Cisco ENCOR Routing Protocols

Question 1

What OSPF router type connects one or more areas to the OSPF backbone (Area 0)?

Accepted Answer

Area Border Router (ABR)

Answer

An ABR (Area Border Router) connects one or more OSPF areas to backbone Area 0 and maintains separate LSDBs for each area it belongs to.

Question 2

What is the administrative distance of OSPF internal routes on a Cisco router?

Accepted Answer

110

Answer

OSPF internal routes have an administrative distance of 110 in Cisco IOS, making them less preferred than EIGRP (90) but more preferred than RIP (120).

Question 3

Which LSA type is generated by an ASBR to advertise external routes into the OSPF domain?

Accepted Answer

Type 5 (AS External LSA)

Answer

Type 5 AS External LSAs are originated by ASBRs and flooded throughout the entire OSPF domain except into stub areas.

Question 4

In EIGRP, which concept refers to the best backup route that is guaranteed loop-free without requiring a query?

Accepted Answer

Feasible Successor

Answer

A Feasible Successor satisfies the Feasibility Condition (its Reported Distance < current Feasible Distance), guaranteeing it is loop-free and can be used immediately upon failure of the primary path.

Question 5

What is the default OSPF hello interval on a broadcast (Ethernet) network type?

Accepted Answer

10 seconds

Answer

On broadcast network types, OSPF uses a default hello interval of 10 seconds and a dead interval of 40 seconds (4x hello).

Cisco ENCOR Practice Test

Cisco ENCOR Practice Test

Cisco ENCOR Routing Protocols