Practice Test Geeks(CCST) Cisco Certified Support Technician Networking 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. Which IPv4 address block is used for testing and documentation purposes only (TEST-NET)?

    Answer: 192.0.2.0/24

    192.0.2.0/24 is designated by RFC 5737 as TEST-NET-1, reserved for documentation and example use.

  2. A router interface is configured with IP address 10.1.1.1/30. How many usable hosts can connect to this link?

    Answer: 2

    A /30 subnet has 4 addresses total: 1 network, 2 hosts, and 1 broadcast — making it ideal for point-to-point links.

  3. What is the result of ANDing a host IP address with its subnet mask?

    Answer: The network address

    ANDing an IP address with its subnet mask zeroes out the host bits, revealing the network address.

  4. A packet destined for 10.5.3.255 on a 10.5.3.0/24 network will be sent to which type of address?

    Answer: Directed broadcast

    10.5.3.255 is the directed broadcast address for the 10.5.3.0/24 subnet, delivered to all hosts on that subnet.

  5. Which supernet correctly summarizes the subnets 192.168.4.0/24 through 192.168.7.0/24?

    Answer: 192.168.4.0/22

    Four consecutive /24 subnets (4–7) can be summarized as a single /22 block starting at 192.168.4.0.

  6. What is the valid host range for the subnet 192.168.100.128/26?

    Answer: 192.168.100.129–192.168.100.190

    The /26 block .128–.191 has network address .128 and broadcast .191, leaving .129 through .190 as usable hosts.

  7. Which IPv4 address is an example of a Class A address?

    Answer: 10.0.0.1

    Class A addresses range from 1.0.0.0 to 126.255.255.255; 10.0.0.1 falls within this range.