Which ICMP message type is sent by the router if an IP packet TTL field reaches zero?
A. Destination Unreachable
B. ICMP Time-Exceeded
C. Echo Reply
D. Echo Request
Which ICMP message type is sent by the router if an IP packet TTL field reaches zero?
A. Destination Unreachable
B. ICMP Time-Exceeded
C. Echo Reply
D. Echo Request