Which of the following is a Layer 3 protocol designed to permit routers to excha

Question

Which of the following is a Layer 3 protocol designed to permit routers to exchange information about networks that are reachable, the routes by which they may be reached, and the costs associated with such routes? a. Routing protocol b. Redistributed protocol c. Maximum protocol d. All of the above It is better to use EIGRP than any other routing protocol because it works on any router. True False Administrative distance is a value used by CISCO routers to decide between routes learned from different sources. True False Route summarization is the combination of many routes that share their leftmost bits into one route. True False

Explanation / Answer

Answer 30: (A) Routing protocol

A routing protocol specifies how routers communicate with each other, information that enables them to select routes between any two nodes on a computer network.

Routing algorithms determine the specific choice of route. Each router has a priori knowledge only of networks attached to it directly. A routing protocol shares this information first among immediate neighbors, and then throughout the network. This way, routers gain knowledge of the topology of the network.

How Routing Protocols Work

Every network routing protocol performs three basic functions:

Answer 31: True

Enhanced Interior Gateway Protocol (EIGRP), a Cisco proprietary routing protocol, EIGRP was developed to be used with any media and network topology. It uses an algorithm called DUAL (Diffuning Update Algorithm) to calculate a loop free path to each network. Which has proven most idea for multi levels of hierarchy because of the ability to summarize at any router interface.

some advantages of EIGRP are:

Fast convergence

Variable length subnet mask

Support for partial updates

Support for multiple network layer protocols

Answer 32: True

Administrative distance is the feature that routers use in order to select the best path when there are two or more different routes to the same destination from two different routing protocols.

Most routing protocols have metric structures and algorithms that are not compatible with other protocols. In a network with multiple routing protocols, the exchange of route information and the capability to select the best path across the multiple protocols are critical.

Administrative distance defines the reliability of a routing protocol. Each routing protocol is prioritized in order of most to least reliable (believable) with the help of an administrative distance value.

Answer 33 : True

This growth taxes CPU resources, memory, and bandwidth used to maintain the routing table. Route summarization techniques can manage this corporate growth much like Internet growth has been managed. With a thorough understanding of route summarization you can implement a scalable network.

In large internetworks, hundreds, or even thousands, of network addresses can exist. It is often problematic for routers to maintain this volume of routes in their routing tables. Route summarization (also called route aggregation or supernetting) can reduce the number of routes that a router must maintain, because it is a method of representing a series of network numbers in a single summary address.

Route Summarization Example

Router A has the following networks in its routing table:

172.16.12.0/24

172.16.13.0/24

172.16.14.0/24

172.16.15.0/24

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