Cisco ENCOR Ultimate 2 — Questions and Answers
Question 1: Which EIGRP feature allows a router to use a backup route immediately upon detecting a topology change without running a full diffusing computation?
- Stuck-In-Active (SIA)
- Feasible Successor (Correct answer)
- Query Scoping
- Route Summarization
Correct 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.
Question 2: In OSPF, what is the purpose of the 'ip ospf network point-to-point' command on a multi-access interface?
- Forces DR/BDR election on the segment
- Eliminates DR/BDR election and treats the link as a direct peer connection (Correct answer)
- Enables OSPF authentication on the interface
- Changes the OSPF hello interval to 10 seconds
Correct 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.
Question 3: A network engineer needs to redistribute connected routes into BGP without advertising the loopback used for BGP peering. Which solution is BEST?
- Use 'network' statements for each connected prefix
- Apply a route-map with a prefix-list to filter the loopback during redistribution (Correct answer)
- Use 'redistribute connected' with no additional filtering
- Disable BGP synchronization
Correct 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.
Question 4: Which QoS scheduling mechanism guarantees minimum bandwidth to each class while allowing unused bandwidth to be shared among queues?
- Priority Queuing (PQ)
- Weighted Fair Queuing (WFQ)
- Class-Based Weighted Fair Queuing (CBWFQ) (Correct answer)
- Low Latency Queuing (LLQ)
Correct 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.
Question 5: What is the default administrative distance of an OSPF inter-area (O IA) route in Cisco IOS?
- 90
- 110 (Correct answer)
- 115
- 120
Correct answer: 110
OSPF inter-area routes carry the same administrative distance of 110 as intra-area OSPF routes on Cisco IOS.
Question 6: In a Cisco SD-WAN fabric, which component is responsible for distributing OMP routes and policies between vEdge/WAN Edge routers?
- vManage
- vBond
- vSmart (Correct answer)
- vAnalytics
Correct answer: vSmart
The vSmart controller runs OMP (Overlay Management Protocol) and distributes routing information, policies, and keys to all WAN Edge devices.
Question 7: Which spanning-tree feature sends TCN BPDUs upstream and immediately flushes the MAC address table on non-edge ports upon detecting a topology change?
- PortFast
- BPDU Guard
- Rapid PVST+ (802.1w) (Correct answer)
- Loop Guard
Correct 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.
Cisco ENCOR Ultimate 2
Which EIGRP feature allows a router to use a backup route immediately upon detecting a topology change without running a full diffusing computation?