When a user connects to a VPN and experiences connectivity issues to an external server, the problem is often related to routing or network path issues.
E). tracert:
Traces the path packets take from the user's device to the destination server.
Helps determine if the traffic is being blocked or misrouted.
F). route print:
Displays the device's routing table.
Helps diagnose whether traffic is being sent to the VPN tunnel instead of the correct external server.
Incorrect Options:
A). nslookup: Used for resolving domain names to IPs (DNS troubleshooting), but this issue is likely routing- related.
B). tcpdump: Captures packets for deep packet analysis, not typically the first step in diagnosing a VPN- related access issue.
C). arp: Used for resolving local network MAC addresses, not relevant for external VPN issues.
D). dig: Like nslookup, used for DNS queries, but not useful for routing problems.
Reference:
CompTIA Network+ N10-009 Official Study Guide - Chapter on Troubleshooting Network Connectivity