- A
HTTP: Transfers web pages and resources
This option correctly matches each protocol to its primary function: HTTP for web pages, FTP for file transfers, SMTP for sending email, POP3 for downloading email, IMAP for managing email on the server, and Telnet for remote access (though insecure).
- B
FTP: Transfers files between client and server
This option incorrectly swaps the functions of HTTP and FTP, SMTP and POP3, and IMAP and Telnet. HTTP is for web pages, not file transfers; FTP is for file transfers, not web pages; SMTP sends email, not downloads; POP3 downloads email, not sends; IMAP manages email on server, not remote access; Telnet provides remote access, not email management.
- C
SMTP: Sends email messages
This option correctly identifies HTTP and FTP but incorrectly swaps SMTP and POP3, and misassigns IMAP and Telnet. SMTP sends email, not downloads; POP3 downloads email, not sends; IMAP manages email on server, not remote access; Telnet provides remote access, not email management.
- D
SSH: Provides secure remote login and command execution
This option correctly identifies HTTP, FTP, and SMTP but incorrectly swaps POP3 and IMAP, and incorrectly states that Telnet provides secure remote access. POP3 downloads email, not manages on server; IMAP manages email on server, not downloads; Telnet is insecure, not secure.
Quick Answer
The answer is that DNS translates domain names to IP addresses, NTP synchronizes device clocks, Syslog collects and forwards log messages, and DHCP dynamically assigns IP configuration parameters. These four protocols are foundational to network reliability and manageability: DNS enables human-friendly naming instead of memorizing numeric addresses, NTP ensures accurate timestamps for security logs and authentication protocols like Kerberos, Syslog centralizes event monitoring for troubleshooting and compliance, and DHCP automates IP address allocation to eliminate manual configuration errors. On the CCNA 200-301 v2 exam, this matching question tests your ability to distinguish core network services from application-layer protocols like HTTP; a common trap is confusing Syslog with SNMP, but remember Syslog is for log messages while SNMP is for monitoring and managing device status. To lock in the functions, use the mnemonic “DNS Names, NTP Time, Syslog Logs, DHCP Assigns.”
CCNA Network Infrastructure and Connectivity Practice Question
This 200-301 practice question tests your understanding of network infrastructure and connectivity. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: dNS resolves domain names to IP addresses, enabling devices to locate network resources by name rather than numeric addresses.. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Match each protocol or service to its primary function.
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"primary"Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
HTTP: Transfers web pages and resources
DNS (Domain Name System) translates human-readable domain names into IP addresses that devices use to communicate. NTP (Network Time Protocol) ensures that clocks on network devices are synchronized, critical for logging and authentication. Syslog is the standard for sending and collecting event and log messages from network devices to a central server. DHCP (Dynamic Host Configuration Protocol) dynamically assigns IP addresses, subnet masks, default gateways, and other network configuration parameters to client devices, simplifying network management.
Key principle: DNS resolves domain names to IP addresses, enabling devices to locate network resources by name rather than numeric addresses.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
HTTP: Transfers web pages and resources
Why this is correct
This option correctly matches each protocol to its primary function: HTTP for web pages, FTP for file transfers, SMTP for sending email, POP3 for downloading email, IMAP for managing email on the server, and Telnet for remote access (though insecure).
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
DNS resolves domain names to IP addresses, enabling devices to locate network resources by name rather than numeric addresses.
- ✓
FTP: Transfers files between client and server
Why this is correct
This option incorrectly swaps the functions of HTTP and FTP, SMTP and POP3, and IMAP and Telnet. HTTP is for web pages, not file transfers; FTP is for file transfers, not web pages; SMTP sends email, not downloads; POP3 downloads email, not sends; IMAP manages email on server, not remote access; Telnet provides remote access, not email management.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
DNS resolves domain names to IP addresses, enabling devices to locate network resources by name rather than numeric addresses.
- ✓
SMTP: Sends email messages
Why this is correct
This option correctly identifies HTTP and FTP but incorrectly swaps SMTP and POP3, and misassigns IMAP and Telnet. SMTP sends email, not downloads; POP3 downloads email, not sends; IMAP manages email on server, not remote access; Telnet provides remote access, not email management.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
DNS resolves domain names to IP addresses, enabling devices to locate network resources by name rather than numeric addresses.
- ✓
SSH: Provides secure remote login and command execution
Why this is correct
This option correctly identifies HTTP, FTP, and SMTP but incorrectly swaps POP3 and IMAP, and incorrectly states that Telnet provides secure remote access. POP3 downloads email, not manages on server; IMAP manages email on server, not downloads; Telnet is insecure, not secure.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
DNS resolves domain names to IP addresses, enabling devices to locate network resources by name rather than numeric addresses.
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common mistake is confusing DNS and DHCP: DNS resolves names to addresses, while DHCP leases network configuration. Remember that NTP deals with time, not file transfers or email.
Detailed technical explanation
How to think about this question
DNS (Domain Name System) is a critical network protocol that translates human-friendly domain names into IP addresses, enabling devices to locate servers and services on the network. In Cisco environments, DNS is essential for resolving hostnames to IP addresses, facilitating communication and management. Without DNS, users and devices would need to remember numeric IP addresses, which is impractical in large networks. NTP (Network Time Protocol) synchronizes the clocks of network devices to a precise time source, ensuring consistent timestamps across logs and events. Accurate timekeeping is vital for troubleshooting, security protocols, and coordinating distributed systems. Cisco devices use NTP to maintain synchronized time, which helps in correlating logs and managing network events effectively. Syslog is a protocol used to send event messages from network devices to a centralized logging server. It helps network administrators monitor device status, detect faults, and audit network activity. DHCP (Dynamic Host Configuration Protocol) automates the assignment of IP addresses and other network configuration parameters to client devices, simplifying network management and reducing configuration errors. Understanding these protocols’ distinct roles is crucial for CCNA candidates to correctly identify their primary functions and apply them in real-world Cisco network scenarios.
KKey Concepts to Remember
- DNS resolves domain names to IP addresses, enabling devices to locate network resources by name rather than numeric addresses.
- NTP synchronizes device clocks across the network to ensure consistent time for logging and security functions.
- Syslog transports event messages from network devices to centralized servers for monitoring and troubleshooting purposes.
- DHCP dynamically assigns IP addresses and network configuration parameters to clients, reducing manual configuration errors.
- Each protocol serves a unique network function, and confusing their roles can lead to misconfiguration or troubleshooting errors.
- Cisco devices rely on these protocols to maintain network operability, security, and manageability.
- Understanding the distinct purpose of each protocol helps in designing and managing Cisco networks effectively.
- Correctly matching protocols to their functions is essential for passing CCNA exam questions related to network services.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
DNS resolves domain names to IP addresses, enabling devices to locate network resources by name rather than numeric addresses.
Real-world example
How this comes up in practice
A network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
What to study next
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Review dNS resolves domain names to IP addresses, enabling devices to locate network resources by name rather than numeric addresses., then practise related 200-301 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this 200-301 question test?
Network Infrastructure and Connectivity — This question tests Network Infrastructure and Connectivity — DNS resolves domain names to IP addresses, enabling devices to locate network resources by name rather than numeric addresses..
What is the correct answer to this question?
The correct answer is: HTTP: Transfers web pages and resources — DNS (Domain Name System) translates human-readable domain names into IP addresses that devices use to communicate. NTP (Network Time Protocol) ensures that clocks on network devices are synchronized, critical for logging and authentication. Syslog is the standard for sending and collecting event and log messages from network devices to a central server. DHCP (Dynamic Host Configuration Protocol) dynamically assigns IP addresses, subnet masks, default gateways, and other network configuration parameters to client devices, simplifying network management.
What should I do if I get this 200-301 question wrong?
Review dNS resolves domain names to IP addresses, enabling devices to locate network resources by name rather than numeric addresses., then practise related 200-301 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
DNS resolves domain names to IP addresses, enabling devices to locate network resources by name rather than numeric addresses.
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Last reviewed: Apr 13, 2026
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