200-101 · Question #161
Which command can be used from a router to verify the Layer 3 path to a host?
The correct answer is B. traceroute address. The IOS command to verify the Layer 3 path from a router to a destination host is 'traceroute', which reveals each hop along the path.
Question
Options
- Atracert address
- Btraceroute address
- Ctelnet address
- Dssh address
How the community answered
(26 responses)- A8% (2)
- B88% (23)
- C4% (1)
Why each option
The IOS command to verify the Layer 3 path from a router to a destination host is 'traceroute', which reveals each hop along the path.
'tracert' is a Windows command-line utility and is not a valid Cisco IOS command; entering it in IOS would return an error.
The 'traceroute address' command is the Cisco IOS privileged EXEC command that sends probe packets with incrementing TTL values to discover each Layer 3 hop between the router and the destination, verifying the routed path end to end.
'telnet address' establishes a remote terminal session and tests TCP/IP connectivity to a specific port but does not reveal the Layer 3 hop-by-hop path.
'ssh address' initiates an encrypted management session and does not provide hop-by-hop path verification.
Concept tested: Layer 3 path verification using traceroute
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp/command/iap-cr-book/iap-t2.html
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