About This Flashcard Deck
This flashcard deck contains 10 cards covering key Advanced Routing concepts for the ENARSI exam. Test your advanced routing knowledge for ENARSI. Use active recall by attempting to answer each question before revealing the answer.
Question
What is the EIGRP AD for internal vs external routes?
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Answer
Internal: 90. External: 170.
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All Advanced Routing Flashcards
Q: What is the EIGRP AD for internal vs external routes?
A: Internal: 90. External: 170.
Q: What is DMVPN Phase 3?
A: Uses NHRP redirect and shortcut to enable direct spoke-to-spoke tunnels without hub involvement in data plane. Hub sends NHRP redirect message.
Q: What is the difference between OSPF E1 and E2 routes?
A: E1: cost = external cost + internal cost to ASBR. E2: cost = external cost only (default type).
Q: What does uRPF strict mode do?
A: Drops packets if the source IP is not reachable via the interface the packet arrived on (reverse path check).
Q: What is a BGP route reflector?
A: An iBGP peer that re-advertises routes to other iBGP peers, eliminating the need for full-mesh iBGP.
Q: What is CoPP?
A: Control Plane Policing — rate-limits traffic to the router CPU to protect the control plane from DoS attacks.
Q: What is PBR?
A: Policy-Based Routing — forwards packets based on policy (route map) instead of the routing table destination lookup.
Q: What is the IKEv2 advantage over IKEv1?
A: Fewer messages to establish SA (4 vs 9), built-in NAT traversal, EAP authentication support, more reliable.
Q: What seed metric is needed for EIGRP redistribution?
A: Bandwidth, delay, reliability, load, MTU (set with default-metric or route-map set metric commands).
Q: What is an OSPF virtual link?
A: A logical link through a transit area to connect a non-backbone area to Area 0 when physical connectivity is not possible.
Cisco Flashcard Study Strategy
Cisco exams heavily test protocol operations and configuration details. Use these flashcards to drill port numbers, protocol behaviours, and administrative distances. Pair flashcard sessions with Packet Tracer labs — when you encounter a card about OSPF neighbour states, open a lab and verify each state transition on a live topology. This combination of memorisation and practice builds the deep understanding Cisco exams demand.