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27 votes
27 votes

Match the following:
$$\begin{array}{llll} \text{(P)} & \text{SMTP} &(1)& \text{Application layer} \\ \text{(Q)} & \text{BGP}& (2) & \text{Transport layer} \\   \text{(R)} & \text{TCP}& (3) & \text{Data link layer} \\  \text{(S)} & \text{PPP}& (4) & \text{Network layer} \\ &&(5) & \text{Physical layer}  \\ \end{array}$$

  1. $\text{P - 2, Q - 1, R - 3, S - 5}$
  2. $\text{P - 1, Q - 4, R - 2, S - 3}$
  3. $\text{P - 1, Q - 4, R - 2, S - 5}$
  4. $\text{P - 2, Q - 4, R - 1, S - 3}$
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4 Answers

Best answer
35 votes
35 votes

Answer is B.

  • SMTP is an application layer protocol used for e-mail transmission.
  • TCP is a core transport layer protocol.
  • BGP is a network layer protocol backing the core routing decisions on the Internet.
  • PPP is a data link layer protocol commonly used in establishing a direct connection between two networking.
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10 votes
10 votes
Correct answer is :: P - 1, Q - 4, R - 2, S - 3

Explanation::
SMTP is application layer protocol but take help of TCP for activation over link for transfering mail.

TCP:: It is transport layer protocol.

BGP:: Border Gateway procoly is used to connect two AS and used in Network layer.

While PPP:: Point to point connection with the help of MAC will come under the category of Data Link layer.
–5 votes
–5 votes
The answer is (C). PPP - refers to Point to Point Protocol which falls under Physical Layer.
Answer:

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