Nishat Kazi's video: Cisco Routing Switching Protocols with Access Control Lists ACL

Types of Routing Protocols (3.1.4) Table 3-1 showed how routing protocols can be classified according to various characteristics. This section gives an overview of the most common IP routing protocols. Most of these routing protocols will be examined in detail in other chapters. For now, this section gives a very brief overview of each protocol. Classifying Routing Protocols (3.1.4.1) Routing protocols can be classified into different groups according to their characteristics. Specifically, routing protocols can be classified by their: Purpose: Interior Gateway Protocol (IGP) or Exterior Gateway Protocol (EGP) Operation: Distance vector protocol, link-state protocol, or path-vector protocol Behavior: Classful (legacy) or classless protocol For example, IPv4 routing protocols are classified as follows: RIPv1 (legacy): IGP, distance vector, classful protocol IGRP (legacy): IGP, distance vector, classful protocol developed by Cisco (deprecated from 12.2 IOS and later) RIPv2: IGP, distance vector, classless protocol EIGRP: IGP, distance vector, classless protocol developed by Cisco OSPF: IGP, link-state, classless protocol IS-IS: IGP, link-state, classless protocol BGP: EGP, path-vector, classless protocol The classful routing protocols, RIPv1 and IGRP, are legacy protocols and are only used in older networks. These routing protocols have evolved into the classless routing protocols, RIPv2 and EIGRP, respectively. Link-state routing protocols are classless