200-101 Question #124: Real Exam Question with Answer & Explanation

The correct answer is A: terminal monitor. Cisco IOS sends debug and syslog output to the console port by default and suppresses it on VTY (Telnet/SSH) sessions. A remote user must issue 'terminal monitor' to redirect that output to their active session.

Question

Refer to the exhibit. You are connected to the router as user Mike. Which command allows you to see output from the OSPF debug command?

Options

Aterminal monitor
Bshow debugging
Cshow sessions
Dshow ip ospf interface

Explanation

Cisco IOS sends debug and syslog output to the console port by default and suppresses it on VTY (Telnet/SSH) sessions. A remote user must issue 'terminal monitor' to redirect that output to their active session.

Common mistakes.

B. 'show debugging' lists which debug commands are currently active on the router but does not enable those messages to appear on a VTY session.
C. 'show sessions' displays active outbound Telnet connections initiated from the router to other devices and has no relationship to debug output visibility.
D. 'show ip ospf interface' shows static OSPF interface state such as area membership, DR/BDR election results, and hello/dead intervals but does not display live debug output.

Concept tested. Redirecting debug output to remote VTY sessions

Reference. https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/debug/command/db-cr-book/db-t1.html

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