Routing Protocol For Ccna Training

Routing Protocols: Interior, Exterior, Link State and Distance Vector Routing
Routing Protocols allow routers to animatedly advertise and learn routes, decide which routes are available and which are the most proficient routes to a destination. Routing protocols provide the layer 3 network state update and populate routing tables on the layer 3 switch/router.

Packet routing in the Internet is divided into two general groups: interior and exterior routing. Interior routing happens inside to an independent network system. In TCP/IP
Distance Vector protocols determine best path on how far the destination is, while Link State protocols are competent of using more sophisticated methods taking into terminology, these independent network systems are called autonomous systems. Within an autonomous system (AS), routing information is exchanged using an interior routing protocol chosen by the autonomous system's administration. The exterior routing protocols, on the other hand are used between the autonomous systems.
There are two main types of algorithms for IP routing:Distance Vector Routing and Link State Routing. deliberation link variables, such as bandwidth, delay, reliability and load.
Distance Vector protocols judge best path on how far it is. Distance can be hops or a combination of metrics calculated to represent a distance value. The IP Distance Vector routing protocols still in use today are: Routing Information Protocol (RIP version1 and version2) and Interior Gateway Routing Protocol.
Distance-vector routing protocols are simple and proficient in small networks, and require little, if any management. However, they do not scale well, and have poor convergence properties, which has led to the development of more compound but more scalable link-state routing protocols for use in large networks.
A Link-state routing used in routing of packet-switched networks in computer communications. Link-state routing works by having the routers tell every router on the network about its closest neighbors. The entire routing table is not distributed from any router, only the part of the table containing its neighbors.
Some of the link-state routing protocols are the OSPF(Open Shortest Path First), IS-IS and EIGRP(Enhanced Interior Gateway Routing Protocol). Novell's NLSP (NetWare Link State Protocol) is also a link-state routing protocol, which only supports IPX. This type of routing protocol requires each router to maintain at least a partial map of the network.When a network link changes state (up to down, or vice versa), a notification, called a link state advertisement (LSA) is flooded throughout the network. All the routers note the change, and re-compute their routes accordingly.
Link State Routing protocols provide greater litheness and intricacy than the Distance Vector routing protocols. They decrease overall broadcast traffic and make better decisions about routing by taking characteristics such as bandwidth, delay, reliability, and load into consideration, instead of basing their decisions solely on distance or hop count. This routing protocol are the most important part of the routing concept. Without the knowledge of this routing protocol ,Routing of data through a network cannot be understand.This protocol are very important for all cisco training like CCNA, CCNP, CCIE and others