Definition of dynamic routing protocols
Routers can exchange routing data and dynamically learn about distantly connected networks via routing protocols. This information is included in their routing table as a foundation for forwarding packets. Big networks often employ dynamic routing protocols to simplify the configuration required to set up static routes. Most networks contain a combination of static and dynamic routes. If you want to know about Dynamic Routing Protocols in CCNA, You can join the CCNA Course in Chennai at FITA Academy.
Classification
Different categories exist for dynamic routing protocols.
- Routing protocols for both interior and external gateways,
- Routing protocols for distance vector, path vector, and link state,
- Classful and classless.
Operation of routing protocols
We must comprehend how routing protocols function now that we understand them.
Routing protocols encompass the procedures, messages, and tools routers use to obtain information about distantly connected networks from other routers that have those routing protocols set up. to transmit packets
- Routing protocols function by:
- Discovering remote networks
- Maintaining current routing information
- Path determination
These elements make up the routing protocol.
Data structures – This data relates to distant networks. It typically consists of neighbour and topology tables and is kept in RAM.
Algorithm – This is a list of the sequential phases that routing uses to find the ideal path for a specific network.
Routing protocol messages – These are needed to keep the routing information updated. Examples include, among others, greetings and updates. Are you looking for the Best institution to do a CCNA Course? FITA Academy is the right place to learn the CCNA Course Online with the help of experts.
The way routing protocols may differ depending on the routing protocol. Each routing protocol, though, has some specific inherent properties.
- Information exchange on interfaces to identify nearby routers
- Exchange of publicly listed routes
- Executing the algorithm to find the optimum route
- Best pathways are added to the routing table.
- Detection of topological changes and implementation of required modifications
The majority of routers perform these actions. Each routing protocol has unique procedures, which will be covered in a subsequent stage.
Classful and classless
Classful Routing Protocols
Subnet masks are not updated in classful routing protocols’ routing updates. It’s because they were created before CITR and VLSM were available. An illustration of such a system is RIPv1. Since they do not contain the subnet mask in their router updates, they are ineffective in subnetted networks.
Classless routing protocols
Routing updates in classless routing protocols also contain the subnet mask and the network address.
Classful routing protocols are no longer in use in most current networks; hence classless routing protocols will be this course’s primary focus.
Administrative distance and metric
Metric
A routing protocol employs a metric to establish how much it will cost to connect to distant networks. This could be the fuel required for travellers to go to their destination in the tourism example. When numerous paths exist for a network, the measurement is used to choose the best path.
The routing table’s routes are all given priority. The greatest and most popular routes are those that are directly connected. The AD determines how reliable a route is.
The administrative distance (AD) is often a number between 0 and 255; the lower the number, the better the source of the routing information; a route with an AD of 255 can never be relied upon. Learn CCNA Course In Bangalore with the Well- Experienced trainers.
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