640-861 Designing for Cisco Internetwork Solutions (DESGN) Practice Tests

Demo Question 4.

Answer: B, F

Explanation: IGP Interior Gateway Protocol: Any protocol used by the Internet to exchange routing data within an independent system EIGRP (Enhanced IGRP) Enhanced IGRP (EIGRP) was created to resolve some of the problems with IGRP. One problem is that the entire route table is sent when changes are made in the network; another problem is the lack of formal neighbor relationships with connected routers. EIGRP is a hybrid of both link-state and distance-vector routing algorithms, which brings the best of both worlds together. EIGRP allows for equal-cost load balancing, incremental routing updates, and formal neighbor relationships, overcoming the limitations of IGRP. This enhanced version uses the same distance-vector information as IGRP, yet with a different algorithm. EIGRP uses DUAL (diffusing update algorithm) for metric calculation. EIGRP is used within the Enterprise Network. Static Route Static routes are manually configured on a router. They do not react to network outages. The one exception is when the static route specifies the outbound interface: If the interface goes down, the static route is removed from the routing table. Because static routes are unidirectional, they must be configured for each outgoing interface the router will use. The size of today's networks makes it impossible to manually configure and maintain all the routes in all the routers in a timely manner. The main benefit of static routing is that a router generates no routing protocol overhead. Because no routing protocol is enabled, no bandwidth is consumed by route advertisements between network devices. Static routing is recommended for hub-and-spoke topologies with a low-speed remote connection. A default static route is configured at each remote site because the hub is the only route used to reach all other sites.