Top 10 CCNP Interview Questions You Should Know

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Top 10 CCNP Interview Questions You Should Know

2019-08-15

If you want to find some CCNP OSPF interview questions and answers for networking engineers, you’re at the right place. SPOTO sorts out top 10 questions to help you get more opportunity to advance your career.

1. Can you explain the difference between E1 and E2 OSPF routes?

E1 OSPF route: The E1 OSPF route contains the OSPF cost to reach ASBR and the cost from ASBR to the external route.

E2 OSPF route: The E2 route contains the cost from ASBR to the external route only.

2. What is the purpose of a default route?

A default route is used if there is not a specific entry in the routing table for the destination.

3. Explain the purpose of OSPF virtual link?

The virtual link is used to connect a non-zero area to the backbone, in case the non-zero area gets disconnected from the backbone. It is also used if the backbone or area 0 becomes discontiguous.

4. Describe why postal addresses and telephone numbers are routable.

A postal address has three components that can be used to deliver mail: state, city, and street. A phone number has an area code and exchange. At the core layer, mail can be delivered to the next post office based on only the state or city and state information. A phone number is delivered at the core layer based on the area code.

5. Convert FACE1234 16 to dotted decimal.

FA 16 = 250 10, CE16 = 20610, 1216 = 18 10, and 34 16 = 52 10

FACE1234 16 = 250.206.18.52 dotted decimal

6.What is the broadcast address for network 142.16.72.0/23?

142.16.73.255

7.What are the purposes of areas in an OSPF network?

Areas allow the design of a hierarchical network. Routes can be summarized or blocked in an area to reduce the amount of routing information on internal OSPF routers.

8. What are the states that an EIGRP route can be in and what do these states mean?

The passive state means that a router has a successor for a route. The active state means that a router does not have a successor or feasible successor for a route and is actively sending queries to neighbors to get information about the route.

9. What types of routes are allowed into a totally stubby area?

OSPF intra-area routes and a default route. OSPF interarea and external routes are not advertised into a totally stubby area.

10. What are the three types of OSPF routers?

ABR, internal router, and ASBR.

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