Practice Test Geeks(GATE) Graduate Aptitude Test in Engineering Practice Test
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Networks Flashcards

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

Read the first 7 Networks flashcards as text

  1. Which of the following correctly describes a full-duplex communication channel?

    Answer: Data flows in both directions simultaneously

    Full-duplex allows simultaneous bidirectional data transmission, as opposed to half-duplex which requires turn-taking.

  2. The maximum window size in TCP using a 16-bit window field (without scaling) is:

    Answer: 65,535 bytes

    The 16-bit window field can represent values from 0 to 2^16 - 1 = 65,535 bytes.

  3. In a network where a router has the routing table entry '192.168.10.0/24 via 10.0.0.1', what does '10.0.0.1' represent?

    Answer: The next-hop router

    In a routing table, 'via X.X.X.X' denotes the next-hop IP address — the address of the next router toward the destination.

  4. The CRC polynomial x^3 + x + 1 is applied to the message 1011. What is the degree of the remainder after division?

    Answer: At most degree 2

    The remainder from dividing by a degree-r polynomial has degree at most r-1; here r=3, so remainder degree ≤ 2.

  5. Which of the following is NOT a characteristic of UDP?

    Answer: Guaranteed in-order delivery

    UDP is connectionless and does not guarantee ordered or reliable delivery; guaranteed in-order delivery is a TCP feature.

  6. In CIDR notation, the block 10.0.0.0/8 contains how many IP addresses?

    Answer: 16,777,216

    A /8 prefix leaves 32-8=24 host bits, so 2^24 = 16,777,216 addresses.

  7. Which protocol is used by routers to dynamically learn the group membership of directly connected hosts for multicast routing?

    Answer: IGMP

    IGMP (Internet Group Management Protocol) is used by hosts to report their multicast group memberships to directly connected routers.