Match the following: (P) SMTP (1) Application layer (Q) BGP (2) Transport…

2007

Match the following: 


(P) SMTP     (1) Application layer
(Q) BGP      (2) Transport layer
(R) TCP      (3) Data link layer
(S) PPP      (4) Network layer
             (5) Physical layer

  1. A.

    P – 2 Q – 1 R – 3 S – 5

  2. B.

    P – 1 Q – 4 R – 2 S – 3

  3. C.

    P – 1 Q – 4 R – 2 S – 5

  4. D.

    P – 2 Q – 4 R – 1 S – 3

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Show answer & explanation

Correct answer: B

Correct matches: P – 1, Q – 4, R – 2, S – 3

  • P (SMTP) → Application layer (1): SMTP is used for sending and receiving email and operates at the application layer.

  • Q (BGP) → Network layer (4): BGP is a routing protocol that exchanges routing information between autonomous systems, a network-layer function.

  • R (TCP) → Transport layer (2): TCP provides end-to-end reliable transport (connection management, flow control, error detection).

  • S (PPP) → Data link layer (3): PPP (Point-to-Point Protocol) provides framing, authentication, and link control over point-to-point links, which is a data-link layer responsibility.

Therefore the correct matching is P – 1, Q – 4, R – 2, S – 3.

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