N10-009 · Question #489
N10-009 Question #489: Real Exam Question with Answer & Explanation
The correct answer is A: Review the router's ACL.. The traceroute output shows that the first hop (10.1.1.1) responds, but subsequent hops show only asterisks ( *), meaning no response was received from those hops. This typically occurs when intermediate routers block ICMP Time Exceeded messages, which traceroute relies on. The m
Question
A network technician is troubleshooting the connection to the company website. The traceroute command produces the following output: Which of the following should the technician do to identify the path to the server?
Options
- AReview the router's ACL.
- BExecute netstat.
- CPerform an nslookup.
- DEnable LDP.
Explanation
The traceroute output shows that the first hop (10.1.1.1) responds, but subsequent hops show only asterisks (* * *), meaning no response was received from those hops. This typically occurs when intermediate routers block ICMP Time Exceeded messages, which traceroute relies on. The most likely cause is an Access Control List (ACL) on one or more routers in the path that is blocking ICMP traffic, preventing traceroute from showing the complete route. Netstat displays active local network connections, not routing paths. Nslookup checks DNS resolution, not network path. LDP (Label Distribution Protocol) is used in MPLS networks and not Reviewing the ACL on the router(s) is the appropriate next step to troubleshoot this traceroute
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