Which one of these statements should the designer keep in mind when considering the advanced routing features?

Which one of these statements should the designer keep in mind when considering the advanced
routing features?

A.
One-way route redistribution avoids the requirement for static or default routes.

B.
Redistribution, summarization, and filtering are most often applied between the campus core
and enterprise edge.

C.
Filtering only occurs on the routing domain boundary using redistribution.

D.
Summarize routes at the core toward the distribution layer.

E.
The hierarchical flexibility of IPv6 addressing avoids the requirement for routing traffic reduction
using aggregation.

Explanation:

Routing Protocols on the Hierarchical Network Infrastructure
The selected routing protocol should be used based on the network design goals and the network
module being used. As shown in Figure 11-23, high-speed routing is recommended for the
network core and distribution layers. These routing protocols react fast to network changes. It is a

best practice that the same routing protocol be used in the three layers (core, distribution, access)
of the enterprise network.
The enterprise edge connects the campus network with external connectivity including WAN,
Internet, VPN. remote-access modules. Routing protocols in the enterprise edge may be EIGRP,
OSPF, BGP, and static routes. Specifically in the Internet module you will find BGP/static routes.
Table 11-9 shows a summary of the recommended routing protocols in the network infrastructure.