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GATE CSE 2010 | Question: 15. PGEE 2018

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33 33 votes

One of the header fields in an IP datagram is the Time-to-Live (TTL) field. Which of the following statements best explains the need for this field?

  1. It can be used to prioritize packets.
  2. It can be used to reduce delays.
  3. It can be used to optimize throughput.
  4. It can be used to prevent packet looping.

8 Answers

4 4 votes
It prevent infinite looping over network .Bcz each router decrease its value by one and when this(TTL) value become zero ,then it  is discarder by router silently.
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2 2 votes

1. TTL decreases by one each time the packet is forwarded by a router.

2.  If TTL reaches zero, the packet is discarded. 


3.  This eliminates packets trapped in routing loops. 
 

Option D

1 1 vote

Time-to-Live (TTL): It can be used to prevent packet looping.

Type of Service (ToS): It can be used to prioritize packets

Quality of Service (QoS): It can be used to reduce delays

Explicit Congestion Notification (ECN): It can be used to optimize throughput

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