Networking Concepts Quiz

In an OSPF network, NSSA areas and STUB areas are both for reducing the number of LSAs. The most important difference between the two is that NSSA areas can introduce external routes and simultaneously receive external routes introduced by other OSPF areas.

• Correct

• Incorrect

GRE is a Layer 2 VPN encapsulation technology that can encapsulate packets of certain data link layer protocols, and finally make the encapsulated packets capable of transmission in an IP network.

• Correct

• Incorrect

In IP multicast, RPF routes can only be generated by selection from unicast routes and group static routes.

• Correct

• Incorrect

After a BGP peer is established, changing the BGP Router ID will cause the BGP peer relationship to reset.

• Correct

• Incorrect

In an IS-IS network, a Level-1 router can only access other areas by connecting to the IS-IS backbone area through a Level-1-2 router.

• Correct

• Incorrect

In an IS-IS network, a router can only belong to one area; while in an OSPF network, different interfaces of a router can belong to different areas.

• Correct

• Incorrect

In a certain enterprise office network, the OSPF routing protocol is running and multiple OSPF areas are divided. To reduce the routing table scale and optimize device resource utilization, the enterprise network engineer can perform route summarization on the ASBR to reduce type-3 LSAs between areas.

• Correct

• Incorrect

When configuring VRRP, engineers need to pay attention that the virtual IP addresses between different backup groups cannot overlap, but device interfaces belonging to the same backup group can use different VRIDs.

• Correct

• Incorrect

In an OSPF network, two directly connected routers have different network types: one device is P2P and the other is P2MP. If the Hello time of both devices is modified to be consistent for the above scenario, it will not affect the establishment of neighbors and the synchronization of LSDBs.

• Correct

• Incorrect

In an OSPF network, if two non-directly connected routers with the same Router-ID are running in the same area, it will cause problems with type 1 LSA calculation.

• Correct

• Incorrect