CCIE Enterprise Infrastructure Flashcards

What is the purpose of the LISP protocol in Cisco SD-Access?

Answer: Providing mapping between endpoint identifiers and routing locators

LISP (Locator/ID Separation Protocol) in SD-Access maps endpoint identifiers (EIDs) to routing locators (RLOCs) for fabric-based forwarding.

In Cisco SD-Access, which node type acts as the first point of attachment for end devices and enforces policy?

Answer: Edge node

Edge nodes in SD-Access are the first point of attachment for end devices, performing policy enforcement and LISP registration.

Which BGP attribute is used to influence inbound traffic by advertising a less specific prefix from a multi-homed AS?

Answer: AS-path prepending

AS-path prepending artificially lengthens the AS path on specific advertisements to make that path less preferred for inbound traffic.

What is the default administrative distance for OSPF in Cisco IOS?

Answer: 110

OSPF has a default administrative distance of 110 in Cisco IOS, making it less preferred than EIGRP (90) but more preferred than RIP (120).

In OSPF, which LSA type is generated by ABRs to summarize routes between areas?

Answer: Type 3

Type 3 LSAs (Summary LSAs) are generated by ABRs to advertise networks from one area into another area.

Which QoS mechanism uses a token bucket algorithm to limit traffic bursts while allowing sustained rates?

Answer: Traffic shaping

Traffic shaping buffers excess traffic and releases it smoothly using a token bucket, allowing short bursts without dropping packets.