Certification Questions

Q:

Assume a router has a loopback address of 135.77.9.254. Convert the loopback address to an IS-IS system ID.

Answer

The loopback address written in dotted decimal and using three digits for each byte has a value of 135.077.009.254. The system ID is 13.50.77.00.92.54.

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Subject: CCNP

1 1866
Q:

How does OSPF determine the DR on a multi-access network?

Answer

The router with the highest interface priority will be the router ID. If all the interface priorities on the multi-access network are the same, the router with the highest router ID will be the DR.

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Subject: CCNP

0 1331
Q:

Why are intra-area summary routes not allowed?

Answer

OSPF databases on routers in the same area must be identical. If route summarization was allowed within an area, some routers would have specific routes and some routers would have summary routes for routes in the area. If this were allowed, the databases for the area would never agree

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Subject: CCNP

0 1577
Q:

What types of routes are allowed into a stub area?

Answer

OSPF intra-area and interarea routes, and a default route. External routes are not advertised into a stub area.

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Subject: CCNP

0 1361
Q:

What types of routes are allowed into a NSSA?

Answer

OSPF intra-area and interarea routes, and possibly a default route. External routes from ABRs are blocked, and external routes from ASBRs are converted to N1 or N2 routes.

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Subject: CCNP

0 1348
Q:

Explain the difference between a classful and a classless routing protocol.

Answer

Classless routing protocols advertise subnet mask information along with the network prefixes. Classful routing protocols do not. Therefore, for a classful protocol, all subnets for the major network number being used must be the same length. Also, classful protocol cannot support discontiguous networks prefixes.

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Subject: CCNP

0 1366
Q:

What is the full IPv6 address represented by FF02::130F:5?

Answer

FF02:0000:0000:0000:0000:0000:130F:0005

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Subject: CCNP

0 2283
Q:

Convert 10100010111101011001110110001011 2 to dotted decimal.

Answer

Convert to dotted hexadecimal first, and then convert each hexadecimal number pair to decimal.

A2.F5.9D.8B then 162.245.157.139

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