Cisco CCNA mock exam questions sample test – Question 270

.You are the network administrator for your company. Your company has opened a new site in London. The Chief Technical Officer (CTO) of the company wants to implement a
routing protocol that can provide the following features:
Supports multiple large networks
Does not require a hierarchical physical topology
Supports VLSM
Provides loop prevention and fast convergence
Provides load balancing over un-equal cost links
Which routing protocol should be implemented in the new site?

A. Enhanced Interior Gateway Routing Protocol (EIGRP)
B. Open Shortest Path First (OSPF)
C. Interior Gateway Routing Protocol (IGRP)
D. Routing Information Protocol version 2 (RIPv2)

Correct Answer: A

Explanation:
Enhanced Interior Gateway Routing Protocol (EIGRP) is the routing protocol that should be implemented for this scenario. EIGRP is a classless protocol that allows the use of variable
length subnet masks (VLSM) and classless interdomain routing (CIDR) for the allocation of IP addresses. The following are characteristics of EIGRP:
Supports large networks due to high scalability.
Does not require a hierarchical physical topology.
Provides loop prevention and fast convergence by using Diffusing Update Algorithm (DUAL).
Performs equal cost load balancing by default.
Can be configured to perform unequal-cost load balancing.
Supports VLSM and CIDR.
Is a hybrid routing protocol (a distance-vector protocol that also provides link-state protocol characteristics).
Is a classless protocol.
Sends partial route updates only when there are changes.
Supports Message-Digest algorithm 5 (MD5) authentication.
Has an administrative distance is 90 for EIGRP internal routes, 170 for EIGRP external routes, and 5 for EIGRP summary routes.
Is only used with Cisco platforms.
All the other options are incorrect because they would not provide the features required in this scenario.
OSPF requires a hierarchical physical topology.
IGRP does not support VLSM.
RIPV2 is not designed for multiple large networks.
Objective:
Routing Fundamentals
Sub-Objective:
Compare and contrast distance vector and link-state routing protocols
References:
Cisco > Articles > Cisco Certification > CCNP > Shooting Trouble with IP
Cisco > Support > IP > IP Routing > Design > Design TechNotes > Introduction to EIGRP > Document ID: 13669