Network Operations CCIE-ENTERPRISE-INFRASTRUCTURE Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   A network administrator runs 'show interfaces' on a switch and sees that the input errors counter is incrementing rapidly on a port connected to a server. The administrator also sees that the CRC errors counter is high. What is the most likely cause?

   • AThere is a faulty cable or bad connection on the port.
   • BThe server is sending too much traffic, causing buffer overflows.
   • CThe server's network interface is failing.
   • DThe switch port is configured for the wrong duplex mode.
   Reveal Solution Discussion Select an answer first
2. 17application · medium

   A network engineer is troubleshooting a problem where users cannot access a web server. The engineer can ping the web server's IP address from the users' subnet, but the web page does not load. The engineer wants to determine if the web server is listening on port 80. Which tool should the engineer use?

   • Anslookup to the web server's domain name
   • Btelnet to the web server on port 80
   • Ctraceroute to the web server
   • Dping to the web server with a large packet size
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   While analyzing a packet capture, a network engineer notices that a client is sending many TCP SYN packets to a server, but the server is not responding. The capture shows that the SYN packets are arriving at the server's interface. What is the most likely cause?

   • AThe server's firewall is silently dropping the SYN packets.
   • BThe server's TCP stack is overwhelmed and dropping SYNs.
   • CThe server's application is not listening on the destination port.
   • DThe client is sending SYNs to the wrong IP address.
   Reveal Solution Discussion Select an answer first
5. 19expert · hard

   A network engineer is troubleshooting intermittent connectivity issues between two routers connected via a serial link. The engineer runs 'show interfaces serial 0/0' and sees that the line protocol is up, but there are increasing numbers of input errors and CRC errors. The engineer also notices that the clock rate is set on both ends. What should the engineer do to resolve the issue?

   • ADisable keepalives on the serial interface.
   • BChange the clock rate on one end to match the other.
   • CIncrease the bandwidth on the serial interface.
   • DReplace the serial cable with a new one.
   Reveal Solution Discussion Select an answer first
6. 20expert · hard

   A network engineer needs to capture traffic on a switch that is experiencing high CPU utilization. The engineer suspects that a SPAN session is contributing to the CPU load. The engineer wants to capture traffic for a specific application without impacting the switch's performance. What should the engineer do?

   • AConfigure a SPAN session with a filter to capture only the application's traffic.
   • BUse an ERSPAN session to offload the capture to a remote analyzer.
   • CUse tcpdump on the switch's CPU to capture traffic.
   • DUse a local SPAN session without any filters.
   Reveal Solution Discussion Select an answer first