CCIE CCIE Network Design

Question 1

In the Cisco hierarchical network design model, which layer is responsible for routing between VLANs and applying QoS policies before traffic enters the core?

Accepted Answer

Distribution layer

Answer

The distribution layer aggregates access-layer traffic, performs inter-VLAN routing, and applies QoS and policy enforcement before handing off to the core.

Question 2

Which design approach uses a single routing process to provide both intra-area fast convergence and scalability across multiple areas in OSPF?

Accepted Answer

Hierarchical OSPF with multiple areas

Answer

Hierarchical OSPF with multiple areas limits LSA flooding scope per area, enabling fast local convergence while backbone area 0 provides scalability across the domain.

Question 3

A network designer is choosing between VSS and StackWise Virtual for a campus core. What is the primary design advantage of VSS/StackWise Virtual over traditional dual-chassis designs using HSRP?

Accepted Answer

Elimination of STP blocked ports by enabling active-active forwarding

Answer

VSS and StackWise Virtual create a single logical switch that allows both uplinks to forward traffic simultaneously, eliminating STP-blocked ports and doubling usable bandwidth.

Question 4

When designing a WAN with diverse provider circuits for redundancy, which BGP attribute should be manipulated on inbound traffic to prefer one ISP over another without changing outbound path selection?

Accepted Answer

MED (MULTI_EXIT_DISC)

Answer

MED is advertised to neighboring ASes to suggest a preferred entry point into your AS, influencing how external providers forward traffic to you on inbound paths.

Question 5

In a spine-leaf data center fabric design, what is the maximum number of hops between any two endpoints regardless of the fabric size?

Accepted Answer

3 hops

Answer

In spine-leaf, any endpoint connects to a leaf, traffic crosses one spine, and reaches the destination leaf — always exactly 3 hops, ensuring consistent, predictable latency.

CCIE - Cisco Certified Internetwork Expert Practice Test

CCIE - Cisco Certified Internetwork Expert Practice Test

CCIE CCIE Network Design