What is split horizon?

Given the entropy for a split, Esplit = 0.39 and the entropy before the split, Ebefore = 1. What is the Information Gain for the split?

A

1

B

0.39

C

0.61

D

2.56

In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: Although the event horizon has an enormous effect on the fate and circumstances of an object crossing it, it has no locally detectable features. B: A black hole is a region of spacetime where gravity is so strong that nothing, no particles or even electromagnetic radiation such as light, can escape from it. C: The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. D: The boundary defining the region of space around a black hole from which no escape is possible is called the event horizon.

A

BCAD

B

BCDA

C

BDAC

D

BDCA

The escape velocity at the event horizon of a black hole is 3×108 m/s, i.e., the velocity of light. What is the mass of the black hole if the distance from its centre to the event horizon is 18km?

A

12.15 x 10-30 kg

B

12.15 x 1030 kg

C

Infinity

D

Cannot be determined

The R-horizon of soil horizon consists of

A

unweathered bedrock

B

weathered parent material

C

plant litter at various levels of decomposition

D

None of the above

At the North Pole the sun will rise above the horizon on ____ and set below the horizon on ____.

A

June 22; September 23

B

September 23; December 22

C

March 21; September 23

D

June 22; December 22

E

March 21; December 22

How should a router that is being used in a Frame Relay network be configured to keep split horizon issues from preventing routing updates?

A

Configure a separate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface.

B

Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic.

C

Configure many subinterfaces in the same subnet.

D

Configure a single subinterface to establish multiple PVC connections to multiple remote router interfaces.

Consider the following three statements about link state and distance vector routing protocols, for a large network with 500 network nodes and 4000 links. [S1] The computational overhead in link state protocols is higher than in distance vector protocols. [S2] A distance vector protocol (with split horizon) avoids persistent routing loops, but not a link state protocol. [S3] After a topology change, a link state protocol will converge faster than a distance vector protocol. Which one of the following is correct about S1, S2, and S3?

A

S1, S2, and S3 are all true.

B

S1, S2, and S3 are all false

C

S1 and S2 are true, but S3 is false.

D

S1 and S3 are true, but S2 is false

Distance vector protocols use the concept of split horizon, but link-state routing protocols, such as OSPF, do not.

A

True

B

False

Which of the following is the best description of the operation of split horizon?

A

Information about a route should not be sent back in the direction from which the original update came

B

It splits the traffic when you have a large bus (horizon) physical network

C

It holds the regular updates from broadcasting to a downed link

D

It prevents regular update messages from reinstating a route that has gone down

How should a router that is being used in a Frame Relay network be configured to keep split horizon issues from preventing routing updates

A

Configure a seperate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface

B

Combine multiple Frame Relay circuits as a point-to-point line to support multicast and broadcast traffic

C

Configure many subinterfaces in the same subnet

D

Configure a single subinterface to establish multiple PVC connections to multiple remote router interfaces.

What is split horizon?

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