Practice Test Geeks(ICND1) Interconnecting Cisco Networking Devices Part 1 Practice Test
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Network Fundamentals & IP Addressing Flashcards

7 cards from real ICND1 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 Fundamentals & IP Addressing flashcards as text

  1. Which subnet mask allows for 14 usable host addresses per subnet?

    Answer: /28

    A /28 mask leaves 4 host bits, yielding 2^4 - 2 = 14 usable host addresses.

  2. What is the broadcast address of the subnet 192.168.10.64/26?

    Answer: 192.168.10.127

    A /26 block size is 64; subnet 192.168.10.64 has broadcast at .127 (64+64-1).

  3. Which layer of the OSI model is responsible for logical addressing and routing?

    Answer: Layer 3 – Network

    Layer 3 (Network) handles logical IP addressing and path determination via routing.

  4. A host has IP 172.16.45.200/20. What is the network address of this subnet?

    Answer: 172.16.40.0

    A /20 has a block size of 16 in the third octet; 32 ≤ 45 < 48, so the network is 172.16.40.0.

  5. Which protocol operates at Layer 2 and is used to map IP addresses to MAC addresses?

    Answer: ARP

    ARP (Address Resolution Protocol) resolves known IP addresses to MAC addresses on the local segment.

  6. What is the valid host range for the subnet 10.0.0.128/25?

    Answer: 10.0.0.129 – 10.0.0.254

    Network = 10.0.0.128, broadcast = 10.0.0.255; valid hosts are .129 through .254.

  7. Which PDU name is used at the OSI Transport layer?

    Answer: Segment

    The Transport layer (Layer 4) encapsulates data into segments.