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

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.

Read the first 7 IP Addressing & Subnetting flashcards as text

  1. A company needs 5 subnets with at least 25 hosts each from 192.168.1.0/24. Which subnet mask satisfies this?

    Answer: 255.255.255.224 (/27)

    /27 provides 30 usable hosts per subnet and allows 8 subnets from a /24, meeting both requirements.

  2. What is the purpose of the loopback address 127.0.0.1?

    Answer: To test the local TCP/IP stack without sending traffic on the network

    127.0.0.1 is the loopback address used to test that the local IP stack is functioning correctly.

  3. Which subnet does the host 192.168.5.200/28 belong to?

    Answer: 192.168.5.192

    /28 uses 16-address blocks; 192 is the nearest multiple of 16 ≤ 200, so the network is 192.168.5.192.

  4. In IPv4 subnetting, what does the term 'magic number' refer to?

    Answer: The block size used to calculate subnet boundaries

    The magic number (256 minus the interesting octet of the subnet mask) gives the block size for calculating subnet boundaries.

  5. How many subnets are created when you borrow 3 bits from the host portion of a Class C network?

    Answer: 8

    Borrowing 3 bits creates 2^3 = 8 subnets.

  6. What is the network address of 10.10.10.130/25?

    Answer: 10.10.10.128

    /25 splits the last octet into two halves: .0–.127 and .128–.255; since .130 falls in the second half, the network is 10.10.10.128.

  7. Which address range is reserved for IPv4 multicast traffic?

    Answer: 224.0.0.0–239.255.255.255

    Class D addresses, ranging from 224.0.0.0 to 239.255.255.255, are reserved for multicast group communication.