4.1 Diagnose Network Problems Using Such as Debugs, Conditional Debugs, Traceroute, Ping, SNMP, and Syslog 350-401 Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   A network engineer is troubleshooting intermittent connectivity issues. Which combination of tools is most appropriate to systematically isolate the problem?

   • AUse SNMP to change the router's configuration to fix the issue
   • BUse traceroute only, as it provides all necessary information
   • CUse only debug commands to capture all traffic on the router
   • DUse ping to verify connectivity, traceroute to identify the path, and syslog to check for error events
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2. 22foundation · easy

   A network management system uses SNMP to monitor a router. Which SNMP operation is used by the NMS to retrieve the value of a specific object, such as interface status?

   • ASET
   • BTRAP
   • CINFORM
   • DGET
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4. 23expert · hard

   A network administrator is troubleshooting a performance issue between two data centers. Users report slow application response times, but ping tests show low latency and no packet loss. The administrator runs a traceroute and sees that the path includes a router that is not in the expected routing table. The administrator suspects that traffic is being redirected through a different path. Which tool would best confirm this suspicion?

   • AUse SNMP to query the unexpected router's interface counters.
   • BCompare the traceroute output with the routing table on the local router.
   • CRun a continuous ping to the unexpected router's IP address.
   • DEnable 'debug ip routing' on the local router.
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5. 24expert · hard

   A network engineer is troubleshooting a route redistribution issue between OSPF and EIGRP. The engineer needs to see the routing updates being exchanged, but only for routes from a specific subnet. The engineer is concerned about the CPU impact of debugging on a production router. Which approach should be used?

   • AEnable 'debug ip ospf packet' and 'debug eigrp packets' without filters.
   • BConfigure syslog to capture only messages with the specific subnet in the message text.
   • CUse an access-list to filter 'debug ip routing' output to the specific subnet.
   • DEnable 'debug ip ospf events' and 'debug eigrp fsm' simultaneously.
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6. 25application · medium

   A network administrator is investigating a security incident and needs to review historical logs from multiple routers. The logs are currently stored locally on each device and are overwritten quickly. What should the administrator do to ensure logs are preserved for analysis?

   • AUse SNMP to poll the routers' log buffers.
   • BIncrease the logging buffer size on each router.
   • CEnable 'debug ip packet' on all routers to capture detailed traffic.
   • DConfigure the routers to send syslog messages to a central syslog server.
   Reveal Solution Discussion Select an answer first