Data Questions

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41.

In PPP, the ________ is responsible for establishing, maintaining, configuring, and terminating links

A

NCP

B

LCP

C

CHAP

D

PAP

Correct Answer: B

None.

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42.

In PPP, ________ is a simple authentication procedure with a two-step process:

A

NCP

B

LCP

C

CHAP

D

PAP

Correct Answer: D

None.

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43.

In PPP, _______ is a three-way hand-shaking authentication protocol in which the password is kept secret; it is never sent online.

A

NCP

B

LCP

C

CHAP

D

PAP

Correct Answer: C

None.

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44.

In ________ each station sends a frame whenever it has a frame to send.

A

pure ALOHA

B

slotted ALOHA

C

both (a) and (b)

D

neither (a) nor (b)

Correct Answer: A

None.

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45.

In pure ALOHA, the vulnerable time is ______ the frame transmission time.

A

the same as

B

two times

C

three times

D

none of the above

Correct Answer: B

None.

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46.

The maximum throughput for pure ALOHA is ________ per cent.

A

12.2

B

18.4

C

36.8

D

none of the above

Correct Answer: B

None.

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47.

In __________, each station is forced to send only at the beginning of the time slot

A

pure ALOHA

B

slotted ALOHA

C

both (a) and (b)

D

neither (a) nor (b)

Correct Answer: B

None.

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48.

In slotted ALOHA, the vulnerable time is ______ the frame transmission time.

A

the same as

B

two times

C

three times

D

none of the above

Correct Answer: A

None.

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49.

The maximum throughput for pure ALOHA is ________ per cent.

A

12.2

B

18.4

C

36.8

D

none of the above

Correct Answer: C

None.

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50.

The vulnerable time for CSMA is the ________propagation time.

A

the same as

B

two times

C

three times

D

none of the above

Correct Answer: A

None.

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