What is the purpose of the "time-to-live" (TTL) field of the IPv4 packet? a. ensures that the packet remains in the network long enough to reach its destination b. it was used when the Internet was very slow, but is no longer needed c. it prevents the packet from remaining indefinitely in the network thus helping to prevent network congestion d. none of the above describes the purpose of the TTL field

c. it prevents the packet from remaining indefinitely in the network thus helping to prevent network congestion

Explanation:

It prevents the packet from remaining indefinitely in the network thus helping to prevent network congestion

TTL is a value which is shown so that we can estimate that the packet that will tell the network router whether the packet has been in the network for enough time so that it should be discarded from the network or not.

a software engineer i believe