Layer & protocol – Computer Networking

Layer & protocol – Computer Networking

Question 1 UGC NET June-2020    
Choose the correct answer from the options given below:
A – A-I, B-II, C-III, D-IV
B – A-III, B-IV, C-II, D-I
C – A-II, B-III, C-IV, D-I
D – A-III, B-I, C-IV, D-II

Show Answer With Best Explanation

Answer: B
Explanation:
Serial Line Internet Protocol: The Serial Line Internet Protocol (also SLIP) is an encapsulation of the Internet Protocol designed to work over serial ports and router connections. On personal computers, SLIP has largely been replaced by the Point-to-Point Protocol (PPP), which is better engineered, has more features, and does not require its IP address configuration to be set before it is established. It is worked on Network Layer.
Border Gateway Protocol (BGP):
User Data protocol (UDP):
Simple Network Management Protocol:


Question 2 UGC NET June-2020    
Post office protocol (POP) is a message access protocol which is used to extract messages for clients. In this regard, which of the following are true?
A) POP has two modes, Delete mode and keep
B) In Delete mode, mail is deleted from mailbox after each retrieval
C) In Delete mode, mail is deleted from the mailbox before each retrieval.
D) In keep mode, mail is deleted before retrieval.
E) In keep mode, mail remains in the mailbox after retrieval.
Choose the correct answer from the options given below:
A – (A) and (B) only
B – (A), (D) and (E) only
C – (A), (B), (C) and (D) only
D – (A), (B) and (E) only

Show Answer With Best Explanation

Answer : D
Explanation:
 POP has two modes, Delete mode and keep.
 In Delete mode, mail is deleted from mailbox after each retrieval.
 In keep mode, mail remains in the mailbox after retrieval.


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