Networking Chapter 19

Question 1

IP is a _________ protocol.

Answer 1

connectionless unreliable

Question 2

An HLEN value of decimal 10 means _______.

Answer 2

there are 40 bytes in the header

Question 3

If the fragment offset has a value of 100, it means that _______.

Answer 3

the first byte of the datagram is byte 800

Question 4

What is needed to determine the number of the last byte of a fragment?

Answer 4

both offset number and the total length

Question 5

The IP header size is _______ bytes long.

Answer 5

20 to 60

Question 6

Packets in the IP layer are called _________.

Answer 6

datagrams

Question 7

The total length field defines the total length of the datagram _________.

Answer 7

including the header

Question 8

When a datagram is encapsulated in a frame, the total size of the datagram must be less than the _______.

Answer 8

MTU

Question 9

ICMP is a (an) _________ layer protocol.

Answer 9

network-layer protocol

Question 10

Which of the following is true about ICMP messages?

Answer 10

An ICMP error message may be generated for an ICMP error message

Question 11

When a host moves to a new network, its original address is referred to as __________.

Answer 11

home

Question 12

Which of the following addresses are permanent in mobile IP?

Answer 12

home

Question 13

To communicate with a remote host, a computer needs to go through __________ phase(s).

Answer 13

three

Question 14

In mobile IP communication, the first phase is called __________.

Answer 14

agent discovery

Question 15

In mobile IP communication, the second phase is called __________.

Answer 15

registration

Question 16

In mobile IP communication, the third phase is called __________.

Answer 16

data transfer

Question 17

In mobile IP communication, inefficiency in triangle routing is ________ the one in double crossing.

Answer 17

in the same level as