Which two benefits are provided by using a hierarchical addressing network addressing scheme? (Choose two.)
A. reduces routing table entries B. auto-negotiation of media rates C. efficient utilization of MAC addresses D. dedicated communications between devices E. ease of management and troubleshooting
Correct Answers: A,E
Explanation:
Here are some of the benefits of hierarchical addressing:
Reduced number of routing table entries — whether it is with your Internet routers or your internal routers, you should try to keep your routing tables as small as possible by using route summarization. Route summarization is a way of having a single IP address represent a collection of IP addresses; this is most easily accomplished when you employ a hierarchical addressing plan. By summarizing routes, you can keep your routing table entries (on the routers that receive the summarized routes) manageable, which offers the following benefits:
More efficient routing
A reduced number of CPU cycles when recalculating a routing table or sorting through the routing table entries to find a match
Reduced router memory requirements
Reduced bandwidth required to send the fewer, smaller routing updates
Faster convergence after a change in the network
Easier troubleshooting
Increased network stability
Efficient allocation of addresses — Hierarchical addressing lets you take advantage of all possible addresses because you group them contiguously.