Nework Layer Routing Questions

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41.

In ______, the router forwards the received packet through only one of its interfaces.

A

unicasting

B

multicasting

C

broadcasting

D

none of the above

Correct Answer: A

None.

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42.

In _______, the router may forward the received packet through several of its interfaces

A

unicasting

B

multicasting

C

broadcasting

D

none of the above

Correct Answer: B

None.

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43.

In unicast routing, each router in the domain has a table that defines a ______ path tree to possible destinations

A

average

B

longest

C

shortest

D

none of the above

Correct Answer: C

None.

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44.

In multicast routing, each involved router needs to construct a ________ path tree for each group.

A

average

B

longest

C

shortest

D

none of the above

Correct Answer: C

None.

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45.

In the _______ tree approach, each router needs to have one shortest path tree for each group.

A

group-shared

B

source-based

C

a or b

D

none of the above

Correct Answer: B

None.

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46.

In the group-shared tree approach, _________ involved in multicasting

A

only the core router is

B

all routers are

C

only some routers are

D

none of the above

Correct Answer: A

None.

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47.

Multicast link state routing uses the _______ tree approach

A

source-based

B

group-shared

C

a or b

D

none of the above

Correct Answer: A

None.

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48.

The Multicast Open Shortest Path First (MOSPF) protocol is an extension of the OSPF protocol that uses multicast routing to create source-based trees. The protocol is based on _______ routing

A

distance vector

B

link state

C

path vector

D

none of the above

Correct Answer: B

None.

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49.

. MOSPF is a _______ protocol

A

data-driven

B

command-driven

C

both a and b

D

none of the above

Correct Answer: A

None.

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50.

_________ broadcasts packets, but creates loops in the systems.

A

Forwarding

B

Flooding

C

Backwarding

D

none of the above

Correct Answer: B

None.

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