CompTIA Network+ (N10-008) — Question 856
A network engineer receives the following when connecting to a switch to configure a port: telnet 10.1.200.1
Connecting to 10.1.200.1..Could not open connection to the host, on port 23: Connect failed.
Which of the following is the MOST likely cause for the failure?
Answer options
- A. The network engineer is using the wrong protocol.
- B. The network engineer does not have permission to configure the device.
- C. SNMP has been secured with an ACL.
- D. The switchport the engineer is trying to configure is down.
Correct answer: A
Explanation
The correct answer is A because telnet requires a specific protocol that may not be supported or enabled on the switch, leading to a connection failure. The other options are less likely; permission issues (B) would lead to a different error message, SNMP settings (C) do not affect telnet connections, and an inactive switch port (D) wouldn't directly cause a telnet connection failure as the issue lies with the protocol rather than the state of the port.