Ultimate Flashcards

Which EIGRP feature allows a router to use a backup route immediately upon detecting a topology change without running a full diffusing computation?

Answer: Feasible Successor

A Feasible Successor is a pre-computed backup route that meets the Feasibility Condition, allowing instant failover without triggering a DUAL computation.

In OSPF, what is the purpose of the 'ip ospf network point-to-point' command on a multi-access interface?

Answer: Eliminates DR/BDR election and treats the link as a direct peer connection

Configuring 'point-to-point' network type on a multi-access interface bypasses DR/BDR election, reducing convergence overhead when only two OSPF neighbors exist.

A network engineer needs to redistribute connected routes into BGP without advertising the loopback used for BGP peering. Which solution is BEST?

Answer: Apply a route-map with a prefix-list to filter the loopback during redistribution

A route-map referencing a prefix-list applied during redistribution selectively blocks the loopback prefix while advertising all other connected routes.

Which QoS scheduling mechanism guarantees minimum bandwidth to each class while allowing unused bandwidth to be shared among queues?

Answer: Class-Based Weighted Fair Queuing (CBWFQ)

CBWFQ assigns guaranteed minimum bandwidth to each traffic class and distributes any excess bandwidth proportionally among all classes.

What is the default administrative distance of an OSPF inter-area (O IA) route in Cisco IOS?

Answer: 110

OSPF inter-area routes carry the same administrative distance of 110 as intra-area OSPF routes on Cisco IOS.

In a Cisco SD-WAN fabric, which component is responsible for distributing OMP routes and policies between vEdge/WAN Edge routers?

Answer: vSmart

The vSmart controller runs OMP (Overlay Management Protocol) and distributes routing information, policies, and keys to all WAN Edge devices.

Which spanning-tree feature sends TCN BPDUs upstream and immediately flushes the MAC address table on non-edge ports upon detecting a topology change?

Answer: Rapid PVST+ (802.1w)

Rapid PVST+ uses Topology Change Notifications and flushes MAC tables on non-edge ports within seconds, providing faster convergence than classic 802.1D.