CCIE CCIE Enterprise Infrastructure 2 — Questions and Answers
Question 1: What is the purpose of the LISP protocol in Cisco SD-Access?
- Encrypting overlay traffic
- Providing mapping between endpoint identifiers and routing locators (Correct answer)
- Load balancing across WAN links
- Authenticating network devices
Correct 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.
Question 2: In Cisco SD-Access, which node type acts as the first point of attachment for end devices and enforces policy?
- Control plane node
- Border node
- Edge node (Correct answer)
- Intermediate node
Correct answer: Edge node
Edge nodes in SD-Access are the first point of attachment for end devices, performing policy enforcement and LISP registration.
Question 3: Which BGP attribute is used to influence inbound traffic by advertising a less specific prefix from a multi-homed AS?
- MED
- Local preference
- AS-path prepending (Correct answer)
- Weight
Correct answer: AS-path prepending
AS-path prepending artificially lengthens the AS path on specific advertisements to make that path less preferred for inbound traffic.
Question 4: What is the default administrative distance for OSPF in Cisco IOS?
- 90
- 100
- 110 (Correct answer)
- 120
Correct 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).
Question 5: In OSPF, which LSA type is generated by ABRs to summarize routes between areas?
- Type 1
- Type 2
- Type 3 (Correct answer)
- Type 5
Correct answer: Type 3
Type 3 LSAs (Summary LSAs) are generated by ABRs to advertise networks from one area into another area.
Question 6: Which QoS mechanism uses a token bucket algorithm to limit traffic bursts while allowing sustained rates?
- WRED
- FIFO
- Traffic policing
- Traffic shaping (Correct answer)
Correct answer: Traffic shaping
Traffic shaping buffers excess traffic and releases it smoothly using a token bucket, allowing short bursts without dropping packets.
CCIE CCIE Enterprise Infrastructure 2
What is the purpose of the LISP protocol in Cisco SD-Access?