A hierarchical design of the EIGRP domain facilitates which two of the following? (Choose two.)
A.
route summarization
B.
faster convergence
C.
unequal cost load balancing
D.
redistribution
E.
virtual links
Explanation:
Hierarchical Versus Flat Routing Protocols
Some routing protocols require a network topology that must have a backbone network defined.
This network contains some, or all, of the routers in the internetwork. When the internetwork is
defined hierarchically, the backbone consists of only some devices. Backbone routers service and
coordinate the routes and traffic to or from routers not in the local internetwork. The supported
hierarchy is relatively shallow. Two levels of hierarchy are generally sufficient to provide scalability.
Selected routers forward routes into the backbone.
OSPF and IS-IS are hierarchical routing protocols. By default, EIGRP is a flat routing protocol, but
it can be configured with manual summarization to support hierarchical designs.
Flat routing protocols do not allow a hierarchical network organization. They propagate all routing
information throughout the network without dividing or summarizing large networks into smaller
areas. Carefully designing network addressing to naturally support aggregation within routingprotocol advertisements can provide many of the benefits offered by hierarchical routing protocols.
Every router is a peer of every other router in flat routing protocols; no router has a special role in
the internetwork. EIGRP, RIPv1, and RIPv2 are flat routing protocols.