SSH, or Secure Shell, is the correct protocol for encrypted remote management of routers and switches because it establishes a secure, encrypted tunnel for all terminal session traffic, including login credentials and command output. Unlike Telnet, which sends everything in plaintext and is easily intercepted, SSH uses cryptographic keys and algorithms to protect the entire interactive session, ensuring confidentiality and integrity. On the CompTIA Network+ N10-009 exam, this concept often appears in scenario-based questions where you must choose the right protocol for secure CLI access—Telnet is the classic distractor because it offers remote management but lacks encryption. A common trap is confusing SSH with SNMP or HTTP, but those are not designed for interactive terminal sessions. Remember the mnemonic: “SSH Secures Shell, Telnet Tells Everyone.”
N10-009 Network Operations Practice Question
This N10-009 practice question tests your understanding of network operations. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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.
A network administrator needs to remotely manage multiple routers and switches. The management traffic must be encrypted. Which protocol should be used for the remote terminal sessions?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
SSH
SSH (Secure Shell) encrypts all traffic, including authentication credentials and session data, making it the correct choice for securely managing routers and switches over a network. Telnet transmits everything in plaintext, while SNMP and HTTP lack the interactive encrypted terminal session required for remote CLI management.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Telnet
Why it's wrong here
Telnet provides unencrypted remote terminal access; all data including passwords is sent in cleartext, which is insecure.
Read the scenario before looking for a memorised answer.
✗
SNMP
Why it's wrong here
SNMP is used for network management and monitoring, not for remote terminal sessions.
✗
HTTP
Why it's wrong here
HTTP is used to access web interfaces, but it is unencrypted; HTTPS would be encrypted, but terminal sessions typically use SSH or Telnet.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the distinction between Telnet and SSH by presenting a scenario that requires encryption, hoping candidates overlook that Telnet offers no security and default to it because of its simplicity or familiarity.
Detailed technical explanation
How to think about this question
SSH operates over TCP port 22 and uses public-key cryptography for host authentication and symmetric encryption (e.g., AES, ChaCha20) for session confidentiality. In a production network, SSH keys should be managed via a PKI or SSH key distribution system, and older versions (SSH-1) are deprecated due to vulnerabilities; always enforce SSH-2 (RFC 4253). A common real-world scenario is using SSH with local or AAA (TACACS+/RADIUS) authentication to enforce role-based access control on Cisco IOS devices.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the N10-009 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. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this N10-009 question in full detail.
Network Operations — This question tests Network Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: SSH — SSH (Secure Shell) encrypts all traffic, including authentication credentials and session data, making it the correct choice for securely managing routers and switches over a network. Telnet transmits everything in plaintext, while SNMP and HTTP lack the interactive encrypted terminal session required for remote CLI management.
What should I do if I get this N10-009 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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