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Networking Fundamentals Flashcards

7 cards from real ACP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Networking Fundamentals flashcards as text

  1. Which protocol operates at Layer 3 of the OSI model and is responsible for logical addressing and routing?

    Answer: IP

    IP (Internet Protocol) operates at OSI Layer 3 and handles logical addressing and packet routing between networks.

  2. What is the default subnet mask for a Class B IPv4 address?

    Answer: 255.255.0.0

    Class B addresses (128.0.0.0–191.255.255.255) use a default subnet mask of 255.255.255.0, providing 16 network bits.

  3. Which switching method begins forwarding a frame as soon as the destination MAC address is read, before the full frame is received?

    Answer: Cut-through

    Cut-through switching forwards frames immediately after reading the destination MAC address, minimizing latency.

  4. What does the TTL field in an IP packet header primarily prevent?

    Answer: Routing loops causing infinite circulation

    TTL (Time to Live) prevents packets from circulating indefinitely by decrementing at each hop and discarding the packet when TTL reaches zero.

  5. In a full-duplex Ethernet connection, what is eliminated compared to half-duplex?

    Answer: CSMA/CD collisions

    Full-duplex Ethernet eliminates CSMA/CD collisions by allowing simultaneous send and receive on separate wire pairs.

  6. Which address type is used to send a packet to all devices within a specific multicast group?

    Answer: Multicast address

    Multicast addresses (224.0.0.0–239.255.255.255) deliver packets to all members of a subscribed multicast group.

  7. What is the primary function of the Spanning Tree Protocol (STP) in a switched network?

    Answer: Prevent Layer 2 broadcast storms by eliminating loops

    STP prevents Layer 2 loops and broadcast storms by blocking redundant paths while keeping them available for failover.