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. What is the number of usable host addresses in a /30 subnet?

    Answer: 2

    A /30 leaves 2 host bits: 2^2 - 2 = 2 usable hosts, making it ideal for point-to-point WAN links.

  2. Which encapsulation type is used by default on a Cisco serial interface running HDLC?

    Answer: Cisco HDLC

    Cisco serial interfaces default to Cisco's proprietary HDLC encapsulation, which differs from the ISO HDLC standard.

  3. A host sends a packet to 255.255.255.255. What kind of message is this?

    Answer: Limited broadcast

    255.255.255.255 is the limited broadcast address, delivered to all hosts on the local network segment only.

  4. In the OSI model, which layer handles the conversion of data formats such as encryption and compression?

    Answer: Presentation

    The Presentation layer (Layer 6) translates data formats, handles encryption/decryption, and compression.

  5. Which network address belongs to the same /27 subnet as host 192.168.5.100?

    Answer: 192.168.5.96

    A /27 has a block size of 32; 96 ≤ 100 < 128, so the network address is 192.168.5.96.

  6. Which statement is true about CSMA/CD?

    Answer: It detects collisions after they occur and retransmits after a random back-off

    CSMA/CD (Carrier Sense Multiple Access/Collision Detection) detects collisions and uses a random back-off timer before retransmitting.

  7. What does the term 'default gateway' refer to in IP networking?

    Answer: The router interface used to reach networks outside the local subnet

    The default gateway is the router interface that hosts send packets to when the destination is not on the local subnet.