DevNet Associate (DEVASC) v1.0Network FundamentalsMedium
A network administrator is configuring a new router and needs to implement a routing protocol that scales well for very large networks, automatically discovers neighbors, and converges quickly after topology changes. Which of the following routing protocols best fits these requirements?
- AEIGRP
- BStatic Routing
- CBGP
- DRIPv2
Show answer & explanationAnswer & explanation
Correct answer: A. EIGRP
EIGRP (Enhanced Interior Gateway Routing Protocol) is an advanced distance-vector protocol known for its fast convergence, efficient use of bandwidth, and good scalability for medium to large enterprise networks. It automatically discovers neighbors and adapts quickly to topology changes.
Why the other options are wrong
- B. Static routing does not automatically discover neighbors or converge quickly; it requires manual configuration.
- C. BGP (Border Gateway Protocol) is an exterior gateway protocol used for routing between autonomous systems, not typically within a single enterprise network for general routing.
- D. RIPv2 is a distance-vector protocol that does not scale well for large networks and has slower convergence.
EIGRP (Enhanced Interior Gateway Routing Protocol)
A Cisco proprietary advanced distance-vector routing protocol known for its fast convergence, low overhead, and scalability.
- Uses DUAL (Diffusing Update Algorithm) for fast convergence.
- Supports unequal-cost load balancing.
- Sends partial, bounded updates, reducing bandwidth usage.
Memory trick: EIGRP: Efficient, Intelligent, Great for Rapid Paths.