Practice Test Geeks(CCST) Cisco Certified Support Technician Networking Practice Test
← All CCST Flashcard Decks

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 suspects a duplex mismatch between a PC and a switch port. Which command on a Cisco switch shows the current duplex setting of an interface?

    Answer: show interfaces GigabitEthernet0/1

    The 'show interfaces' command for a specific port displays speed, duplex, and error counters that reveal duplex mismatches.

  2. What is the purpose of the 'ipconfig /release' command followed by 'ipconfig /renew' on a Windows PC?

    Answer: Release the current DHCP lease and request a new IP address

    '/release' surrenders the current DHCP-assigned IP address, and '/renew' sends a new DHCP discovery to obtain a fresh lease.

  3. Which tool is used to measure optical signal power levels in fiber optic cabling?

    Answer: Optical power meter

    An optical power meter measures the light signal strength in fiber optic cables, helping identify signal loss or insufficient power levels.

  4. A Cisco router shows 'up/down' for an interface. What does this indicate?

    Answer: The physical layer is active but the data link layer protocol has failed

    An 'up/down' state means the physical connection (Layer 1) is detected but the line protocol (Layer 2) has not established, often due to encapsulation or keepalive issues.

  5. Which command on Windows displays all active TCP and UDP connections along with the listening ports?

    Answer: netstat -an

    The 'netstat -an' command shows all active network connections and listening ports in numerical format without DNS resolution.

  6. A technician is troubleshooting slow network performance and suspects excessive broadcasts. Which tool would BEST help quantify broadcast traffic on the segment?

    Answer: Protocol analyzer (Wireshark)

    A protocol analyzer like Wireshark captures all traffic and can filter and count broadcast frames to determine whether excessive broadcasts are causing the performance issue.

  7. When troubleshooting a routing issue, a technician uses 'show ip route' and sees a route marked with 'C'. What does 'C' signify?

    Answer: A directly connected network

    In Cisco IOS, the 'C' code in the routing table indicates a directly connected network — one that is on an interface configured with an IP address.