What Does Identification Mean?
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Quick Definition
In IT, identification is simply stating who you are. When you type your username on a login screen, that is identification. It is the first step before you prove your identity with a password or other method. Without identification, a system cannot know which account to check.
Commonly Confused With
Authentication is the process of verifying that someone or something is who they claim to be. Identification is just the claim itself. You cannot authenticate without identification, but identification alone gives no access. In practice, identification uses a username or ID, while authentication uses a password, biometric, or token.
When you type your email address on a login page, that is identification. When you type your password, that is authentication.
Authorization determines what an authenticated user is allowed to do. It happens after identification and authentication. Identification answers 'Who are you?', authentication answers 'Are you really that person?', and authorization answers 'What are you allowed to do?'.
After you log into an online banking app (identification and authentication), the system checks if you are allowed to see your account balance. Checking that permission is authorization.
Accountability is the ability to trace actions back to a specific individual using logs and audit trails. It relies on proper identification (unique user IDs) and authentication. Accountability is not a step in the process but a result of having good identification and logging.
When a security audit shows that user 'jsmith' deleted a file at 2:00 PM, accountability is working because the identification 'jsmith' was uniquely linked to that user.
Accounting is the logging of user activity, including login times, resource consumption, and actions performed. Identification provides the identity that is logged. Accounting is the third A in AAA, but identification must occur first so the logs contain the correct identity.
A RADIUS server records that user 'jdoe' authenticated at 10:00 AM and disconnected at 10:30 AM. The 'jdoe' in the log comes from the identification step.
Federation is an arrangement where multiple organizations share identity information. It relies on identification being passed between systems using standards like SAML or OIDC. Federation does not replace identification; it extends identification across domains.
When you sign into a third-party website using your Google account, Google provides identification (your email address) to the third-party site. That is federation in action.
Must Know for Exams
Identification appears across nearly every major IT certification exam, though it is often tested as part of a broader concept like AAA, access control, or network authentication. In CompTIA Security+, identification is directly covered in domain 3 (Implementation) under the AAA framework. Candidates must understand that AAA stands for Authentication, Authorization, and Accounting, but the first A in common parlance often omits identification. Exam questions will test the distinction: identification is the claiming of an identity, authentication is the verification, and authorization is the granting of permissions. A typical Security+ question might present a scenario: "A user enters their username and password on a login page. Which step occurs first?" The answer is identification, because the username is entered before the password is checked. Another question might ask: "Which component of AAA involves presenting a user ID?" The answer is identification (though sometimes the official CompTIA objectives include identification within authentication). It is important to know that Security+ expects you to differentiate these phases. In the CompTIA Network+ exam, identification appears in the context of network access control (NAC) and 802.1X. Questions may describe a scenario where a device connects to a switch port and sends an EAP identity response. You need to know that identification occurs before any authentication method is chosen. Network+ also tests identification when discussing MAC address filtering, claiming a MAC address is a form of identification, though it is weak because MAC addresses can be spoofed.
In the Cisco CCNA exam, identification is part of the AAA and 802.1X configuration. Cisco expects you to know that the identification step in RADIUS uses the username attribute. A CCNA question might ask: "Which RADIUS attribute carries the user identity?" The answer is User-Name (attribute 1). You might also see questions about the order of operations in AAA: identification first, then authentication, then authorization. In Cisco ISE (Identity Services Engine), identification is the first step in a network access policy. Examinees should understand that the identity group (e.g., Active Directory group) is determined from the username after identification. In the Microsoft Exam MD-100 (Windows Client), identification is tested in the context of user account control and sign-in options. A question might ask: "When a user signs in to Windows, what is the first piece of information they provide?" The answer is the username, which is identification. The password is provided for authentication. The difference is subtle but examiners love to trick you by asking about the "first step" or "initial claim."
In the (ISC)² CISSP exam, identification is part of the Identity and Access Management (IAM) domain. CISSP questions often present complex scenarios involving federated identity, single sign-on, and multifactor authentication. The exam expects you to identify which step in the process is identification. For example, in a Kerberos authentication, the first message from a client to the Authentication Server (AS) includes the client's principal name, that is identification. The AS then checks if the principal exists in the KDC database. Another CISSP concept is that identification must be unique within the security domain, shared accounts violate the principle of accountability. Exam questions may ask: "What is the primary reason for requiring unique user IDs?" The answer is to enable individual accountability, which depends on correct identification.
In all of these exams, the trap is often that candidates confuse identification with authentication. The phrase "logging in" usually includes both steps, but exam questions will specifically ask for the first step or the step that does not involve a secret. Also, watch for scenarios where identification is performed using non-secret attributes like email address, employee number, or hostname. The exams want you to recognize that these are valid forms of identification, even though they are not secret. Another common exam point: identification can be shared (e.g., a group email alias) but that violates security policy. By mastering identification as a distinct concept, you can pick up easy points across multiple certification exams.
Simple Meaning
Think of identification like showing your gym membership card at the front desk. When you walk into the gym, you hand over your card and say, "I am member number 12345." The staff member looks at the card and knows you are claiming to be that member. They do not yet know if you really are that person, but they now know which member profile to check. In IT, identification works the same way. When you log into a website, you first enter your email address or username. That is your claim. The system then knows which account you are trying to access. It does not yet trust you, but it knows where to look. Identification does not involve any secrets or proof. It is just a claim. Think about calling a friend on the phone. When you say, "Hi, it's me, Sarah," that is identification. Your friend still does not know if it really is Sarah until they hear your voice or see your face. The claim comes first. In a network, every device also has an identity. A laptop might have a hostname like "Marketing-Laptop-7." When that laptop tries to join a company network, it identifies itself with that name. The network switch then knows which device is asking for access. Again, identification is just the announcement. In everyday IT, you see identification everywhere. When you swipe a keycard at work, the card reader reads a number. That number is your claimed identity. When you type a username into a VPN client, that is identification. When a printer sends a job to a print server with its own name, that is identification too. Identification is always the first step in any security process. It answers the question, "Who do you say you are?" It does not answer, "Are you really that person?" That is authentication. And it does not answer, "What are you allowed to do?" That is authorization. So remember: identification is simply the claim. It is the starting point for all access control.
Now imagine a library where each book has a card in the front pocket. When you want to check out a book, you write your name on the card. That name is identification. The librarian then looks at the card and knows which patron you claim to be. They still need to check your library card to confirm it is really you. But without that name on the card, they would not even know where to start. In cybersecurity, without identification, the whole security model falls apart. You cannot authenticate a user if you do not know which user to check. And you cannot authorize access if you do not know who is asking. So identification is deceptively simple but absolutely essential. It is the first domino that starts the entire access control process.
Full Technical Definition
In information technology, identification is the process by which a subject (user, device, service, or process) presents a claimed identity to a system, typically in the form of a unique identifier such as a username, user ID (UID), email address, certificate common name, MAC address, IP address, hostname, or digital certificate subject. This claimed identity is used by the system to look up the corresponding security context record, which contains credentials, policy rules, and attribute information. Identification must be distinguished from authentication: identification is the claim of an identity, while authentication is the verification of that claim. The AAA (Authentication, Authorization, and Accounting) framework, widely used in network security, explicitly separates these functions. In an AAA model, identification occurs during the first phase when the user or device supplies a credential identifier (e.g., a username in RADIUS, an X.509 certificate in 802.1X, or a machine account name in Active Directory). The RADIUS protocol (RFC 2865) defines the User-Name attribute as the primary identification field. In 802.1X port-based network access control, the supplicant (client) identifies itself using its EAP identity response, which contains an identity string such as a username or a machine principal name. The authenticator (switch or wireless access point) forwards this identity to the authentication server (typically RADIUS) so that the server can locate the correct authentication method and credentials.
In operating systems, identification is handled by the security subsystem. In Windows, every user account has a Security Identifier (SID). When a user logs on, the Local Security Authority (LSA) uses the supplied username to look up the SID. That SID then becomes the primary identity used for all subsequent access checks. In Linux, the user is identified by a username that maps to a numeric User ID (UID) in the /etc/passwd file. The identification process involves reading this file (or using NSS, Name Service Switch, for networked directories) to resolve the username to a UID. The kernel uses the UID to check permissions for every file or process access. In network environments, identification is often tied to directory services. Microsoft Active Directory uses the sAMAccountName attribute as the logon identifier, along with the User Principal Name (UPN) such as user@domain.com. When a client computer joins a domain, it identifies itself using a machine account name. LDAP (Lightweight Directory Access Protocol) uses the distinguished name (DN) as the unique identifier for an entry, and the identification process in LDAP authentication starts with a bind request containing the DN.
In web applications, identification typically consists of a username or email address submitted via an HTML form. The server uses this identifier to query a user database and retrieve the stored password hash and other attributes. Session management often starts after the user is identified, with a session token being generated for subsequent requests. In certificate-based systems (e.g., client certificates for TLS), the identification is embedded in the certificate's Subject field or Subject Alternative Name (SAN). The server extracts the common name (CN) from the certificate to identify the client before verifying the certificate signature. In network protocols like SNMPv3, identification uses a combination of an engine ID and a username (securityName). In 802.1X, the identity can be sent in cleartext during the EAP-Response/Identity packet, which is why privacy concerns sometimes lead to use of anonymous identities (e.g., "anonymous@domain") for the identification step, followed by a tunneled authentication method that provides the real identity inside an encrypted channel.
identification is a fundamental building block of access control and security. It enables the system to locate the right policy, credentials, and audit trail for the subject. Without accurate identification, subsequent authentication and authorization steps would have no context in which to operate. Exam questions often test the candidate's ability to identify which step in the AAA process corresponds to identification, and to distinguish it from authentication and authorization. The key takeaway is that identification is always the first step, it does not require any secret knowledge, and it is distinct from proving the identity.
Real-Life Example
Imagine you walk into a large office building for a job interview. At the front desk, there is a security guard. You walk up and say, "Hello, I am David Chen. I am here for an interview with the HR team." At this point, the guard has no idea if you are actually David Chen. You have simply made a claim. That claim is identification. The guard looks at a list of expected visitors and finds "David Chen, Interview at 10 AM." Now the guard knows which person on the list you claim to be. This is exactly like a server receiving a username during login: it checks its database to see if that username exists. Next, the guard asks for your driver's license to verify your identity. That step is authentication. The guard checks that the photo and name on the license match the face in front of them. After verifying you are really David Chen, the guard gives you a visitor badge and says, "You may go to the 5th floor, but no other floors." That is authorization. The visitor badge itself contains your claimed identity (your name and a badge number), and whenever you scan the badge at a door, you are performing identification again. The door reader identifies you by the badge number, but it does not automatically let you through, it then checks your authorization level (which floors you can access). In this real-world example, notice that identification happens twice: once when you announce yourself to the guard, and then every time you scan your badge. Each scan is a fresh identification claim. The system uses that claim to look up what you are allowed to do. The guard's first step, writing down your name, is pure identification. No proof, no secret, no password. Just a name.
Now extend the analogy to a computer network. When your laptop connects to a corporate Wi-Fi network, it sends an identity string like "jdoe-laptop" or "jdoe@company.com" to the access point. This is the same as you telling the guard your name. The access point does not yet trust the laptop. It just knows which device or user is asking for access. In EAP-TLS (a common certificate-based authentication), your laptop sends a certificate that contains a common name (CN) like "jdoe-laptop.company.com." That common name is the identification. The RADIUS server reads that CN and looks up your laptop's certificate details and policy. If the certificate is valid and the identity matches, the server allows access. Without the identification step, the server would not know which policy to apply. Would it give you guest access? Employee access? Admin access? The identification tells the server where to start. This is why, in real IT scenarios, identification errors can cause login failures even if the password is correct. For example, if you mistype your username, the system cannot find your account, and it rejects the login attempt immediately. That is an identification failure, not an authentication failure. Understanding this distinction is critical for troubleshooting login issues in the field.
Why This Term Matters
Identification matters in IT because it is the foundation of every access control system. Without correct identification, authentication and authorization cannot function. If the system does not know who or what is requesting access, it cannot determine whether to allow or deny that access. This has direct practical consequences for network administrators, help desk staff, and security professionals. Consider a common scenario: a user calls the help desk and says, "I cannot log in." The first troubleshooting step is always to verify the username. If the user is typing a different username than their assigned one, the system will never find the correct password hash. This is an identification issue, not a password issue. A competent IT professional knows to check the username first before resetting passwords. This simple verification saves hours of wasted effort.
In enterprise networks, identification also impacts auditing and forensics. Every system event is logged against a user identity or device identity. If identification is faulty or spoofed, logs become useless. For example, if an attacker can claim a valid identity without authentication, they can perform actions that get logged under someone else's name. That is why identification alone is never enough to grant access, it must always be paired with strong authentication. However, identification must still be protected. In sensitive environments, usernames are considered private information because knowing a valid username is half the battle for an attacker. Many organizations use anonymous identities during the identification phase of network access, revealing the real identity only inside an encrypted tunnel.
In compliance frameworks like PCI DSS and HIPAA, proper identification of users and devices is a requirement. Auditors check that systems require a unique user ID for each person. Shared accounts are forbidden because they break identification. Without unique identification, you cannot know who performed a specific action. So identification is not just a technical detail; it is a regulatory necessity. For IT professionals, understanding identification means understanding how to design systems that correctly map a username or device name to a security context. It also means understanding that identification data must be handled carefully, usernames, hostnames, IP addresses, and MAC addresses used for identification can be intercepted if sent in cleartext. This is why protocols like EAP (Extensible Authentication Protocol) include mechanisms to send an anonymous identity first, and then the real identity inside a protected channel.
Finally, identification matters because it is the first step in troubleshooting connectivity issues. A device that cannot identify itself on a network may be denied access or placed in a restricted VLAN. Network engineers use commands like "show authentication sessions" on switches to see which identities have been claimed. If the identity is missing or wrong, the session will fail. So whether you are setting up a new user account, configuring a RADIUS server, or debugging a Wi-Fi login, identification is the place to start. Get identification right, and everything else has a chance to work. Get it wrong, and nothing else matters.
How It Appears in Exam Questions
Exam questions about identification generally fall into three patterns: scenario-based, definition-comparison, and order-of-operations. In scenario-based questions, you are given a description of a login process and asked to identify which step corresponds to identification. For example: "A user connects to a corporate VPN and is prompted for their username and then a one-time code from their phone. Which part of the process represents identification?" The correct answer is the username prompt. The one-time code is for authentication. A variant of this question might include biometrics: "A user places their finger on a fingerprint reader and then types their PIN. Which action is identification?" Trick, the fingerprint is used for authentication (it verifies the user's physical trait), and the PIN might also be authentication unless it is used as an identifier. Actually, most biometric systems require you to identify yourself first (e.g., by selecting your name from a list) because the system must know which fingerprint template to compare against. So the identification step might be selecting a username from a dropdown, even before the fingerprint scan. Exam writers love this nuance. Another scenario: "A user swipes a smart card and then enters a PIN. What step is the smart card swipe?" The smart card itself contains a digital certificate that includes the user's identity. Swiping the card presents that identity to the reader. That is identification. The PIN is the authentication factor. You might also see questions where a device identifies itself by its MAC address during network access. For example: "A network switch receives a frame from a device with MAC address 00:11:22:33:44:55. The switch looks up the MAC address in a database. This is an example of what?" The answer is identification.
Definition-comparison questions ask you to distinguish identification from authentication, authorization, and accounting. For instance: "Which of the following best describes identification? A) Proving you know a secret B) Claiming an identity C) Determining what resources you can access D) Logging actions after access" The correct answer is B. Another: "A user provides their email address to a website. The system checks if the email exists in its database. This is an example of: A) Authentication B) Authorization C) Identification D) Accounting" Answer: Identification. Sometimes the question is phrased negatively: "Which of the following is NOT true about identification? A) It requires a secret B) It is the first step in access control C) It can be a username D) It is distinct from authentication" The answer is A. These are straightforward if you know the definition.
Order-of-operations questions ask you to sequence steps. For example: "Put the following AAA steps in the correct order: authorization, authentication, identification, accounting." The correct order is identification, authentication, authorization, accounting. A common exam question: "What is the first step in the RADIUS authentication process?" The answer is the client sends an Access-Request packet containing a User-Name attribute (identification). Another: "In 802.1X, what is the first EAP packet sent by the supplicant?" The answer is EAP-Response/Identity. Some questions combine identification with other concepts. For example, in a question about Kerberos: "What does the client send in the first message to the Authentication Server?" The answer is the client's principal name (user identity). So in summary, when you see a question that involves a user providing a name, ID number, email, or any unique label before any secret or proof, you should immediately think "identification." The exam will try to hide this in descriptions of login windows, network access requests, or certificate presentations. Stay focused on the distinction: is the step just a claim, or is it proof? If it is just a claim, it is identification.
Practise Identification Questions
Test your understanding with exam-style practice questions.
Example Scenario
Imagine you are studying for the CompTIA Security+ exam, and you come across this practice question:
"A company implements a new security policy for remote access. Employees must first enter their employee ID number into a VPN client. Then the VPN client prompts them for a password and finally a one-time code from an authenticator app. Which of the following best describes the entry of the employee ID number? A) Authentication B) Authorization C) Identification D) Accounting"
Let us walk through the scenario. You are an employee named Maria. You have employee ID 2047. You open the VPN client on your laptop. The first screen asks for your employee ID. You type "2047". The VPN client sends this number to the VPN server. The VPN server checks its database and finds that employee ID 2047 belongs to Maria, a sales associate. At this point, the server knows who claims to be connecting. It does not yet trust that it is really Maria. So it sends back a prompt: "Maria, please enter your password." Maria types her password. The server hashes it and compares it to the stored hash. If it matches, authentication succeeds. Next, the server sends a push notification to Maria's phone. Maria opens the authenticator app and types the six-digit code into the VPN client. That is the second authentication factor. After both authentication factors are verified, the server then checks what networks Maria is allowed to access. It applies a policy that allows Maria to reach the sales database and email, but not the HR server. That is authorization. Finally, the server logs the start time, employee ID, and duration of the session. That is accounting.
So the entry of the employee ID number is clearly identification. It is the claim of identity. Without it, the server would not know which password to check or which policies to apply. This example mirrors a real corporate VPN configuration using RADIUS authentication. The identification step often uses the User-Name attribute in the RADIUS Access-Request packet. In the exam, you might see the same scenario but with different details: maybe the user enters an email address, a username, or a smart card PIN (if the PIN is used as an identifier rather than a secret). Always look for the step where the user claims an identity without providing a secret. That is the identification step.
Now consider a different variant: a biometric system. At a secure facility, employees scan their fingerprint at a door. But before scanning, they must first type their employee number. The fingerprint scanner then compares the scanned print to the stored template for that employee number. Here, typing the employee number is identification. The fingerprint scan is authentication. Some modern biometric systems claim they do not require a separate ID entry because they perform identification based on the biometric alone, that is called "identification mode" as opposed to "verification mode." But for exam purposes, if the system requires you to first provide a username, card, or ID, that is the identification step. I hope this scenario clarifies how identification appears in real exam questions and in real IT systems.
Common Mistakes
Thinking that identification and authentication are the same thing.
Identification is simply claiming an identity (e.g., typing a username), while authentication is proving that claim (e.g., providing a password). They are two distinct steps in the access control process. Many exam questions specifically test this difference.
Remember that identification always comes before authentication. If the step involves a secret, it is authentication. If it is just a name or ID, it is identification.
Believing that identification requires a password or other secret.
By definition, identification does not require any secret. A username, email address, or employee ID number is typically not secret. If identification required a secret, it would be a form of authentication. Identification is just a claim, not proof.
Think of identification as the label you put on a mailbox. The label says who you are, but it does not prove you own the mailbox. No secret is needed for the label.
Confusing identification with authorization when reading exam scenarios.
Authorization happens after authentication and determines what resources a user can access. Identification just establishes who the user claims to be. For example, when a system checks a username, that is identification. When it later checks if that user can read a file, that is authorization.
Use the AAA mnemonic: Identification (claim), Authentication (proof), Authorization (permissions), Accounting (logging). Keep them in order and do not skip steps.
Assuming that entering a username is always part of authentication.
Many people think the 'login process' is a single step called 'authentication.' In reality, the login process includes separate identification and authentication stages. Even in multifactor authentication, the first factor (e.g., a password) is authentication, but the username entry that precedes it is identification.
When you see a question about the first step of logging in, always answer identification. Do not let the word 'login' confuse you into thinking the whole process is authentication.
Thinking that identification only applies to users, not devices.
Devices also identify themselves using hostnames, MAC addresses, IP addresses, or device certificates. In network access control, device identification is a key prerequisite for authentication and policy enforcement. Ignoring device identification can lead to gaps in security understanding.
Remember that any subject (user, device, service, process) must be identified before it can be authenticated. Device identification is common in 802.1X and NAC scenarios.
Believing that shared user accounts are acceptable because identification is not important.
Shared accounts break the identification step because the system cannot uniquely identify which individual performed an action. This undermines accountability and forensics. Security standards like PCI DSS explicitly require unique user IDs.
Even if authentication is strong, without unique identification you cannot track who did what. Always advocate for unique user accounts.
Exam Trap — Don't Get Fooled
{"trap":"In a question about the steps of AAA, the options might list 'Identification' as a distractor alongside 'Authentication', 'Authorization', and 'Accounting'. Some candidates think that AAA includes identification as a fourth A, but the official acronym AAA only has three As. So they might select 'Identification' as the odd one out, but in reality, identification is part of the process even though it is not in the acronym."
,"why_learners_choose_it":"Because many study materials explain AAA as Authentication, Authorization, and Accounting, and then separately discuss identification as the first step. When a multiple-choice question asks 'Which of the following is NOT a component of AAA?', candidates might assume identification is included because they learned it as part of the overall process."
,"how_to_avoid_it":"Know the official exam definitions. For CompTIA Security+ and most certification exams, AAA stands strictly for Authentication, Authorization, and Accounting. Identification is a distinct concept that precedes authentication.
In questions about AAA components, identification is NOT one of the three. If the question asks about the steps of access control in general, identification is the first step. Read carefully: does the question ask about 'AAA components' or 'access control steps'?"
Step-by-Step Breakdown
Subject presents a claim
A subject (user, device, or process) presents a unique identifier to the system. This could be a username, email address, MAC address, hostname, or certificate subject. The identifier is sent to the authentication service. At this point, no secrets are exchanged. This step is purely identification. The system now knows which identity record to look up.
System looks up the identity record
The system receives the identifier and searches its identity store (e.g., database, LDAP directory, Active Directory, or local SAM) for a matching record. If the identifier does not exist, the system may reject the request immediately, or it may continue with a dummy record to prevent username enumeration. This step is critical because it determines the context for the subsequent authentication process.
System identifies the authentication policy
Using the identity record, the system determines which authentication method (e.g., password, certificate, biometric, OTP) should be used. For example, if the user's record indicates they have a smart card, the system prompts for smart card authentication. If they have a password, the system prompts for a password. This step relies on the identification to select the correct policy.
System challenges the subject for proof
The system sends a challenge to the subject requesting authentication credentials. This could be a password prompt, a request for a fingerprint scan, or a request for a certificate. The challenge is tailored based on the identity record found in step 2. This step is the start of authentication, but it depends entirely on the identification from step 1.
Subject responds with credentials
The subject supplies the requested credentials (e.g., password, PIN, biometric sample). The system then verifies the credentials against the stored values in the identity record. This is the authentication step. If the credentials match, the subject is authenticated. If not, access is denied. Note that identification was already established, so the system knows exactly which credentials to check.
Practical Mini-Lesson
Identification is not just a theoretical concept, it is something you configure and troubleshoot daily as an IT professional. Let us walk through a real-world scenario: configuring 802.1X for a corporate Wi-Fi network. When a user tries to connect their laptop to the corporate SSID, the wireless access point (AP) sends an EAP-Request/Identity. The laptop (the supplicant) responds with an EAP-Response/Identity packet that contains a username, often in the format user@domain.com. This username is the identification. The AP forwards this identity to the RADIUS server. At this point, the RADIUS server performs the identification step: it looks up the user account in Active Directory or its local database. If the username is not found, the RADIUS server sends an Access-Reject immediately. This is a common cause of connection failures, users often mistype their username or forget to include the domain. As an administrator, you can check the RADIUS logs for 'User-Name' attribute mismatches. The first thing to verify when a user cannot authenticate is whether the username is correct, because identification must succeed before authentication even starts.
Now, consider what happens if identification is sent in cleartext. In the EAP-Response/Identity packet, the username is typically sent in the clear. An attacker sniffing the Wi-Fi traffic can see the username. This is a privacy risk. To mitigate this, many organizations configure their supplicants to send an anonymous identity (like "anonymous@domain.com") as a placeholder. The actual identification is sent later inside a TLS tunnel. This is called 'identity hiding' and is a best practice. In your job, you might need to configure the supplicant (e.g., Windows wired auto-config or a third-party client) to use an anonymous outer identity and a real inner identity. If you skip this configuration, user privacy is compromised.
Another practical area is user account management. When you create a new user in Active Directory, you assign them a sAMAccountName (the old-style logon name) and a User Principal Name (e.g., jdoe@contoso.com). Both are forms of identification. If you create the account but the user cannot log in, check that the identification names are correctly spelled and consistent with what the user is typing. Also, remember that in some systems, the identification is case-insensitive (Windows), while in others it is case-sensitive (Linux). A real-world troubleshooting tip: if a Linux user cannot SSH in, check that they are using the exact case of the username as it appears in /etc/passwd.
Finally, identification plays a role in session management and SSO. When a user authenticates via SAML or OIDC, the identity provider (IdP) sends an assertion containing the user's identifier (often an email or a persistent ID) to the service provider (SP). The SP then uses that identifier to establish a local session. If the identifier changes (e.g., the user changes their email), the mapping between the IdP identifier and the local user account can break, causing access issues. As an IT pro, you must ensure that the identifier used in federation is stable and unique. Identification is not just about usernames; it is about the whole chain of configuration, policy, and troubleshooting. Getting identification right means fewer help desk calls, better security, and smoother authentication flows.
Memory Tip
Think 'ID', Identification first, then Authentication. ID is just the name tag, not the secret handshake.
Covered in These Exams
Current Exam Context
Current exam versions that test this topic — use these objectives when studying.
Related Glossary Terms
Two-factor authentication (2FA) is a security method that requires two different types of proof before granting access to an account or system.
AAA (Authentication, Authorization, and Accounting) is a security framework that controls who can access a network, what they are allowed to do, and tracks what they did.
802.1X is a network access control standard that authenticates devices before they are allowed to connect to a wired or wireless network.
An A record is a type of DNS resource record that maps a domain name to an IPv4 address.
802.1Q is the networking standard that allows multiple virtual LANs (VLANs) to share a single physical network link by tagging Ethernet frames with VLAN identification information.
Summary
Identification is the foundational step in every identity and access control system. It is the act of claiming an identity, typically by providing a unique identifier such as a username, email, or device ID. Without identification, authentication has no target, and authorization cannot be applied.
In IT certification exams, identification is frequently tested as part of the AAA framework. You must be able to differentiate it from authentication and authorization, recognize it in login sequences, and understand its role in protocols like EAP and RADIUS. Common mistakes include confusing identification with authentication and underestimating the security implications of how identification is handled (such as username enumeration).
For real-world IT professionals, proper handling of identification means ensuring unique identifiers, using generic error messages, and separating the identification step from the authentication step in both design and troubleshooting. Whether managing Active Directory, configuring network access control, or developing secure web applications, understanding identification is essential.
The key takeaway for exams: identification is just the claim. It is not proof. Always pair it with strong authentication to build a secure system.