Create stable, secure, and scalable routing designs for EIGRP
5 practice questions under this official exam objective (300-420) — each with the community-verified answer, a full option-by-option explanation and instant feedback.
Preventing Routing Loops in EIGRP-RIPv1 Redistribution
This question addresses the critical design consideration of preventing routing loops during two-way redistribution between EIGRP and RIPv1. It establ
Is BFD Required for Sub-Second Fiber-Break Convergence?
In a Layer 3 design built with point-to-point fiber between topology layers, a fiber cut is a physical-layer event that the interface itself reports a
Which Address Families Isolate Two Companies on a Shared Core?
This 300-420 design item tests how two merged companies can share one MPLS core while keeping their prefixes mutually invisible, and it establishes th
BGP Route Reflector Design Reducing iBGP Peerings
This 300-420 design question tests how a route reflector topology shrinks iBGP peering count: a full mesh of nine routers needs 36 peerings, while thr
Which EIGRP Stub Mode Advertises All Needed Prefixs to Neighbors?
EIGRP's stub feature normally limits what a router advertises, but the leak-map option lets a stub router deliberately re-advertise specific suppresse