Quick Answer
The answer is SSH, because it encrypts the entire session—including credentials and command traffic—while Telnet sends everything in plaintext. SSH establishes a secure, encrypted tunnel between the client and the remote device, ensuring that an attacker capturing network packets cannot read sensitive data like passwords or configuration changes. On the CCNA 200-301 v2 exam, this distinction tests your understanding of secure remote management protocols, often appearing in questions about best practices for device access or in troubleshooting scenarios where a network admin must choose between the two. A common trap is assuming Telnet is acceptable for lab environments; however, Cisco emphasizes SSH as the mandatory standard for any production or exam topology. Remember the mnemonic: “SSH Secures, Telnet Tattles”—if you see a question about encrypting remote CLI management, SSH is always the correct choice.
This 200-301 practice question tests your understanding of network services and security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: sSH encrypts all remote CLI management traffic, including user credentials, to prevent interception and unauthorized access.. 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.
Which protocol is preferred over Telnet for remote CLI management because it encrypts the session?
FTP
Why wrong: FTP is for file transfer, not secure CLI access.
SSH
Correct. SSH secures the remote management session.
TFTP
Why wrong: TFTP is not an interactive management protocol.
SNMPv1
Why wrong: SNMPv1 is not a secure CLI protocol.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
SSH
SSH encrypts credentials and management traffic, making it the standard secure replacement for Telnet.
Key principle: SSH encrypts all remote CLI management traffic, including user credentials, to prevent interception and unauthorized access.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
FTP
Why it's wrong here
FTP is for file transfer, not secure CLI access.
When this WOULD be correct
If the exam question asked for a protocol used for file transfer that supports encryption, such as FTPS or SFTP, then FTP could be considered correct in that context. This would shift the focus from remote CLI management to secure file transfer.
SSH
TFTP
Why it's wrong here
TFTP is not an interactive management protocol.
When this WOULD be correct
If the exam question asked which protocol is used for transferring files in a simple manner without encryption, TFTP would be the correct answer. For example, a question could specify 'Which protocol allows for file transfers without security features?'
SNMPv1
Why it's wrong here
SNMPv1 is not a secure CLI protocol.
When this WOULD be correct
If the question asked for a protocol used for network management that does not require encryption, SNMPv1 would be the correct answer. For example, a question might specify the need for a simple, unencrypted protocol for monitoring network devices.
Option-by-option analysis
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 200-301 exam frequently reuses these exact scenarios with slightly different constraints.
Why this is correct
Correct. SSH secures the remote management session.
Why this is wrong here
FTP is primarily used for transferring files and does not provide encryption for remote command-line interface management sessions. Therefore, it is not a suitable alternative to Telnet for secure remote access.
★ When this WOULD be the correct answer
If the exam question asked for a protocol used for file transfer that supports encryption, such as FTPS or SFTP, then FTP could be considered correct in that context. This would shift the focus from remote CLI management to secure file transfer.
Why candidates choose this
Candidates may confuse FTP with SSH due to both being networking protocols, and they might mistakenly believe that FTP's capabilities extend to secure remote management, especially if they are not fully aware of the specific use cases for each protocol.
Why this is wrong here
TFTP (Trivial File Transfer Protocol) is not used for remote CLI management; it is a simple file transfer protocol that does not provide encryption or secure remote access capabilities.
★ When this WOULD be the correct answer
If the exam question asked which protocol is used for transferring files in a simple manner without encryption, TFTP would be the correct answer. For example, a question could specify 'Which protocol allows for file transfers without security features?'
Why candidates choose this
Candidates may confuse TFTP with SSH due to their similar acronyms and the context of networking protocols, leading them to mistakenly associate TFTP with remote management tasks.
Why this is wrong here
SNMPv1 is primarily used for network management and monitoring, not for secure remote command-line interface (CLI) management. It does not provide encryption, making it unsuitable as a replacement for Telnet in this context.
★ When this WOULD be the correct answer
If the question asked for a protocol used for network management that does not require encryption, SNMPv1 would be the correct answer. For example, a question might specify the need for a simple, unencrypted protocol for monitoring network devices.
Why candidates choose this
Candidates may choose SNMPv1 due to its common association with network management tasks, leading them to mistakenly believe it could be relevant for remote CLI management despite its lack of encryption.
Analysis generated from the official 200-301blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
A frequent exam trap is selecting Telnet or other protocols like FTP or TFTP for remote CLI management because they are familiar or commonly mentioned in networking contexts. Telnet is often mistakenly chosen because it provides remote access, but it sends all data unencrypted, exposing credentials to attackers. FTP and TFTP are file transfer protocols and do not support interactive command-line management sessions. SNMPv1 is used for network monitoring, not secure CLI access, and lacks encryption. Candidates must recognize that only SSH encrypts the session, making it the secure and preferred protocol for remote management in Cisco environments.
Detailed technical explanation
Secure Shell (SSH) is a network protocol that provides administrators with a secure method to access and manage network devices remotely. Unlike Telnet, which transmits data, including passwords, in plaintext, SSH encrypts the entire session, protecting sensitive information from interception or eavesdropping. SSH uses cryptographic techniques to authenticate users and establish an encrypted channel, making it the preferred protocol for remote CLI management in Cisco networks. In Cisco devices, SSH is enabled by generating cryptographic keys and configuring the device to accept SSH connections on the VTY lines. When a user initiates an SSH session, the device authenticates the user and encrypts all transmitted data, including commands and responses. This encryption prevents attackers from capturing login credentials or session data, which is a significant security improvement over Telnet. Cisco recommends SSH for all remote management tasks to comply with security best practices and exam standards. A common exam trap is confusing SSH with other protocols like FTP or TFTP, which serve different purposes such as file transfer and do not provide secure CLI access. Additionally, some may mistakenly believe SNMPv1 offers secure management, but it lacks encryption and is not used for interactive CLI sessions. Understanding the specific role of SSH in securing remote management helps avoid these pitfalls and ensures correct protocol selection in both exam scenarios and real-world Cisco network management.
Key takeaway
SSH encrypts all remote CLI management traffic, including user credentials, to prevent interception and unauthorized access.
Real-world example
A practitioner preparing for the 200-301 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. SSH encrypts all remote CLI management traffic, including user credentials, to prevent interception and unauthorized access. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Review sSH encrypts all remote CLI management traffic, including user credentials, to prevent interception and unauthorized access., then practise related 200-301 questions on the same topic to reinforce the concept.
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FAQ
Network Services and Security — This question tests Network Services and Security — SSH encrypts all remote CLI management traffic, including user credentials, to prevent interception and unauthorized access..
The correct answer is: SSH — SSH encrypts credentials and management traffic, making it the standard secure replacement for Telnet.
Review sSH encrypts all remote CLI management traffic, including user credentials, to prevent interception and unauthorized access., then practise related 200-301 questions on the same topic to reinforce the concept.
SSH encrypts all remote CLI management traffic, including user credentials, to prevent interception and unauthorized access.
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Last reviewed: May 17, 2026
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