Host A pings interface S0/0 on router 3. What is the TTL value for that ping?
A. 252
B. 253
C. 254
D. 255
Answer:B
Host A pings interface S0/0 on router 3. What is the TTL value for that ping?
A. 252 B. 253 C. 254 D. 255
Explanation: The TTL or Time-To-Live gives you an indication of the number of routers between the source and destination. The TTL is used to prevent an IP packet from looping inside an IP network and causing a network meltdown. The initial TTL packet value for an IP packet is 255 and then it is decremented by 1 each time it encounters a router. When this value reaches 0, the packet is discarded by a router. The TTL value is contained in each IP packet including ICMP packets. The TTL value given by the ping command is in fact the TTL value of an echo_response packet. By default, Windows will decrease the TTL by 128 and Ubuntu Linux by 192.