Ans :
Under some circumstances many of the times packets got stuck in loops in the
network and consumes the bandwidth of the network unnecessarily. The size
of this field is 8 bit. This field restricts packets to enter to live infinitely long
time in the Internet. This value is in seconds, but time intervals less than 1
second are rounded up to 1. The value of this field is set to a number (known
as maximum hop count limit). When the packet arrives at a router, the TTL
field value is decrement by one. The packet is dropped by the router if it
encounters TTL field value to be 0 (zero).
