What is the purpose of a packet time-to-live?

A.
Protect against source routing

B.
Ensure that a packet does not continue to be routed forever

C.
Ensure that a packet contains the correct transport header information

D.
Protect against Loki attacks

Explanation:
To ensure that packets do not continually transverse a network
forever, IP provides a time-to-live (TTL) value that is decremented every time the
packet passes through a router.