Network Layer Internet Protocols Questions

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1.

A best-effort delivery service such as IPv4 includes _______.

A

error checking

B

error correction

C

datagram acknowledgment

D

none of the above

Correct Answer: D

None.

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2.

In IPv4 header, an HLEN value of decimal 10 means _______

A

there are 10 bytes of options

B

there are 40 bytes of options

C

there are 10 bytes in the header

D

there are 40 bytes in the header

Correct Answer: D

None.

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3.

In IPv4, what is the value of the total length field in bytes if the header is 28 bytes and the data field is 400 bytes?

A

428

B

407

C

107

D

427

Correct Answer: A

None.

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4.

In IPv4, what is the length of the data field given an HLEN value of 12 and total length value of 40,000?

A

39988

B

40012

C

40048

D

39952

Correct Answer: D

None.

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5.

An IPv4 datagram is fragmented into three smaller datagrams. Which of the following is true?

A

The do not fragment bit is set to 1 for all three datagrams.

B

The more fragment bit is set to 0 for all three datagrams

C

The identification field is the same for all three datagrams.

D

The offset field is the same for all three datagrams

Correct Answer: C

None.

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6.

In IPv4, if the fragment offset has a value of 100, it means that _______

A

the datagram has not been fragmented

B

the datagram is 100 bytes in size

C

the first byte of the datagram is byte 100

D

the first byte of the datagram is byte 800

Correct Answer: D

None.

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7.

In IPv4, what is needed to determine the number of the last byte of a fragment?

A

Identification number

B

Offset number

C

Total length

D

(b) and (c)

Correct Answer: D

None.

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8.

The IPv4 header size _______

A

is 20 to 60 bytes long

B

is always 20 bytes long

C

is always 60 bytes long

D

depends on the MTU

Correct Answer: A

None.

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9.

Which of the following is a necessary part of the IPv6 datagram?

A

Base header

B

Extension header

C

Data packet from the upper layer

D

(a) and (c)

Correct Answer: A

None.

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10.

. In IPv6, the _______ field in the base header restricts the lifetime of a datagram

A

version

B

next-header

C

hop limit

D

neighbor-advertisement

Correct Answer: C

None.

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