Practice Test Geeks(CCST) Cisco Certified Support Technician Networking Practice Test
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Network Troubleshooting & Tools Flashcards

7 cards from real CCST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Network Troubleshooting & Tools flashcards as text

  1. A technician needs to verify that TCP port 443 is open on a remote server. Which command can test this from a Windows command prompt?

    Answer: telnet 10.0.0.1 443

    The telnet command followed by an IP and port number attempts a TCP connection to that specific port, confirming whether it is open.

  2. Which Cisco IOS command clears all dynamic entries from the ARP table?

    Answer: clear arp-cache

    The 'clear arp-cache' command removes all dynamically learned ARP entries from the Cisco device's ARP table.

  3. A network technician observes high CPU utilization on a Cisco router. Which command helps identify which processes are consuming CPU resources?

    Answer: show processes cpu

    The 'show processes cpu' command displays CPU utilization per process, helping identify which process is causing high CPU load.

  4. What does a 'Destination host unreachable' ICMP message from ping indicate compared to 'Request timed out'?

    Answer: 'Destination host unreachable' means a router reported no route; 'Request timed out' means no reply was received

    'Destination host unreachable' is an ICMP error returned by an intermediate router that has no route, while 'Request timed out' simply means the reply never arrived within the timeout.

  5. Which log level in Cisco IOS syslog captures the most detailed debugging information?

    Answer: Level 7 – Debugging

    Syslog level 7 (debugging) is the most verbose level and captures all messages including detailed debugging output.

  6. A technician needs to confirm the MAC address of a remote host that is on the same subnet. Which command should be used after pinging the host?

    Answer: arp -a

    After pinging a host on the same subnet, 'arp -a' shows the ARP cache which will contain the MAC-to-IP mapping for recently contacted hosts.

  7. Which troubleshooting approach starts at the Physical layer and works upward through the OSI model?

    Answer: Bottom-up

    The bottom-up troubleshooting method begins at Layer 1 (Physical) and works up through each OSI layer until the problem is found.