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Architecture Practice Questions

15 original questions covering ENCOR 1.1 to 1.4. Answer every one before opening any explanation. Target: 12 of 15 (80%).

1. A company has one building with 12 access switches. Which design is most cost-effective while keeping redundancy?

  • A. Three-tier with a dedicated core pair
  • B. Spine-leaf fabric with four spines
  • C. Two-tier collapsed core
  • D. Single distribution switch with redundant uplinks
Answer: C

A single building doesn't need a separate core; a collapsed core/distribution pair gives redundancy at lower cost. A adds a layer with no benefit. B is a data centre design. D has a single point of failure.

2. Which two statements about SSO are true? (Choose two.)

  • A. It requires two route processors or supervisors in the same chassis or stack
  • B. It keeps routing protocol adjacencies up on its own without any other feature
  • C. The standby is synchronised with the active's configuration and state
  • D. It provides gateway redundancy across two separate routers
  • E. It replaces the need for EtherChannel
Answer: A, C

SSO works between supervisors in one system and keeps the standby synchronised. Keeping routing neighbours from flapping needs NSF (graceful restart) or NSR as well (B). Redundancy across separate routers is FHRP (D).

3. Which FHRP is enabled for preemption by default?

  • A. HSRPv1
  • B. GLBP (AVG)
  • C. VRRP
  • D. HSRPv2
Answer: C

VRRP preempts by default. HSRP and the GLBP AVG need preempt configured.

4. Match each Catalyst SD-WAN component to its plane.

Component Plane
SD-WAN Manager ?
SD-WAN Validator ?
SD-WAN Controller ?
WAN Edge ?
Answer

Manager: management. Validator: orchestration. Controller: control. WAN Edge: data.

5. What does the SD-WAN Controller use to distribute routes and TLOCs to WAN Edges?

  • A. NETCONF
  • B. BGP
  • C. BFD
  • D. OMP
Answer: D

OMP runs between Controllers and Edges. BFD runs inside data-plane tunnels for liveness and path measurement. NETCONF is how the Manager pushes configuration.

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