When the hop-count field reaches zero and the destination has not been reached, a error message is sent

1. Redirection
2. Time-exceeded
3. Parameter-problem
4. Destination-unreachable

In error reporting the encapsulated ICMP packet goes to .

1. A router
2. The sender
3. The receiver
4. Any of the above

Given the IP address 201.14.78.65 and the subnet mask 255.255.255.224, what is the subnet address?

1. 201.14.78.65
2. 201.14.78.64
3. 201.14.78.12
4. 201.14.78.32

In _ routing, the destination address is a network address in the routing table.

1. Default
2. Next-hop
3. Host-specific
4. Network-specific

Identify the class of IP address 4.5.6.7.

1. Class C
2. Class B
3. Class D
4. Class A

A subnet mask in class C can have 1s with the remaining bits 0s.

1. Eight
2. Ten
3. Twelve
4. Twenty-five

On a network that uses NAT, initiates the communication.

1. The router
2. An internal host
3. An external host
4. (1) or (3)