Ping Command

Question 1

What is the Unreachable Destination or Service code for host unreachable?

Answer 1

1

Question 2

What is the purpose of the ping command?

Answer 2

To test IP connectivity between hosts.

Question 3

What ICMP message can be used to indicate that a packet cannot be forwarded because the TTL field of the packet has expired?

Answer 3

Time Exceeded

Question 4

What is the purpose of the traceroute command?

Answer 4

To observe the path between two devices.

Question 5

What is the purpose of the Traceroute utility?

Answer 5

To observe the path between two devices.

Question 6

Which of the following is NOT a Destination Unreachable code?

• Net Unreachable
• Host Unreachable
• Protocol Unreachable
• Time Exceeded

Answer 6

Time Exceeded

Question 7

When can a router send an ICMP Source Quench message to source hosts?

Answer 7

When it does not have enough buffer space to receive incoming packets and discards them

Question 8

What is the purpose of the ICMP Redirect message?

Answer 8

To notify hosts on a network that a better route is available for a particular destination

Question 9

What is the purpose of tools such as ping and traceroute?

Answer 9

To test the connectivity and operational performance of an IP network

Question 10

What is the purpose of the Time to Live (TTL) field in the Layer 3 header?

Answer 10

To limit the number of hops that a packet can cross.