JNCIA Routing Protocols

Question 1

What type of routing protocol is OSPF?

Accepted Answer

Link-State Interior Gateway Protocol

Answer

Distance-Vector Interior Gateway Protocol

Answer

Path-Vector Exterior Gateway Protocol

Answer

Hybrid Exterior Gateway Protocol

Question 2

In Junos, what command enables OSPF on an interface?

Accepted Answer

set protocols ospf area 0.0.0.0 interface ge-0/0/0.0

Answer

set ospf enable interface ge-0/0/0

Answer

set interfaces ge-0/0/0 ospf area 0

Answer

enable ospf interface ge-0/0/0.0 area 0

Question 3

What is the function of the OSPF Designated Router (DR) on a broadcast network?

Accepted Answer

To reduce the number of OSPF adjacencies by acting as a central point for LSA flooding on the broadcast segment

Answer

To forward all data traffic on the segment

Answer

To perform SPF calculations for all routers

Answer

To assign IP addresses to OSPF neighbors

Question 4

What is the BGP attribute 'LOCAL_PREF' used for?

Accepted Answer

To influence outbound routing decisions within an AS by preferring routes with higher LOCAL_PREF values

Answer

To set the weight of a BGP route for inbound traffic

Answer

To define the AS path length for external BGP routes

Answer

To configure the BGP community for route filtering

Question 5

Which Junos command shows all routes redistributed from OSPF into the local routing table?

Accepted Answer

show route protocol ospf

Answer

show ospf routes redistributed

Answer

show route ospf-export

Answer

show redistribution ospf

Question 6

What is the purpose of BGP route reflectors?

Accepted Answer

To eliminate the need for a full iBGP mesh by reflecting BGP routes between clients without requiring direct iBGP sessions between every router

Answer

To reflect routes from iBGP to eBGP automatically

Answer

To mirror BGP routing tables for backup

Answer

To load balance BGP traffic across multiple paths