300-070 Question #77: Real Exam Question with Answer & Explanation

The correct answer is B: debug voip ccapi inout. Dial-peer matching on a Cisco IOS voice gateway can be verified with three key commands: (B) 'debug voip ccapi inout' - shows the Call Control API processing of a call, including which dial peer was matched at call setup; (D) 'debug voip dialpeer inout' - the most targeted debug

Question

Which three CLI commands allow you to verify the correct VoIP dial-peer matching? (Choose three.)

Options

Adebug ccsip messages
Bdebug voip ccapi inout
Cdebug dialpeer match
Ddebug voip dialpeer inout
Eshow dialplan number

Explanation

Dial-peer matching on a Cisco IOS voice gateway can be verified with three key commands: (B) 'debug voip ccapi inout' - shows the Call Control API processing of a call, including which dial peer was matched at call setup; (D) 'debug voip dialpeer inout' - the most targeted debug for dial-peer matching, showing inbound and outbound peer selection in real time; (E) 'show dialplan number <number>' - a non-disruptive show command that simulates how a given dialed string would match against configured dial peers without needing a live call. Option A ('debug ccsip messages') captures raw SIP signaling messages, useful for SIP troubleshooting but not dial-peer matching logic. Option C ('debug dialpeer match') is not a valid IOS command.

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