Practice Test Geeks(CCST) Cisco Certified Support Technician Practice Test
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IP Addressing & Subnetting 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.

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  1. A technician sees the IP address 192.168.1.255 on a /24 network. What is this address?

    Answer: Broadcast address

    The last address in any subnet (all host bits set to 1) is the directed broadcast address for that network.

  2. What is the total number of IPv4 addresses in a /22 subnet?

    Answer: 1024

    A /22 leaves 10 host bits, so 2^10 = 1024 total addresses.

  3. Which command on a Cisco device shows the IP address and subnet mask configured on an interface?

    Answer: show ip interface brief

    The 'show ip interface brief' command displays IP addresses and status for all interfaces in a concise format.

  4. A host with IP 192.168.10.50/28 tries to communicate with 192.168.10.65. Are these hosts on the same subnet?

    Answer: No, they are on different subnets

    /28 creates 16-address blocks; .50 belongs to 192.168.10.48–.63 and .65 belongs to 192.168.10.64–.79, so they are on different subnets.

  5. What does VLSM (Variable Length Subnet Masking) allow network engineers to do?

    Answer: Use different subnet mask sizes within the same network to minimize IP address waste

    VLSM allows subnets of different sizes within the same address space, allocating exactly as many addresses as each segment needs.

  6. Which of the following correctly describes a /16 subnet mask?

    Answer: 255.255.0.0 with 65,534 usable hosts

    A /16 mask is 255.255.0.0, providing 2^16 = 65,536 total addresses minus 2 = 65,534 usable hosts.

  7. What is the first usable host address in the subnet 172.20.0.0/20?

    Answer: 172.20.0.1

    The network address is 172.20.0.0, so the first usable host is 172.20.0.1.