What is a routing domain?

The routing domain is a term used to identify a lower level of the computer network hierarchy with respect to the direction of network traffic. All computers and routers contained in the domain must be administered by a single source, such as a company or organization, and follow a single routing protocol. There may be another partial network in the domain to describe the topology of the network in detail if they follow the undernet with the same routing protocol. In addition, there may be a specific domain as part of a larger network. It is often an undernet of what is known as an administrative domain that can have any number of routing domains. In this way, two different routing domains can work within different routing protocols in one administrative domain, but is still administered by a single source. Two or the case of the third routing protocol must be made more administrative domains, but will be stored separately from the other two.

Increasing in the hierarchy can exist an administrative domain in what is known as an autonomous system. The autonomous system can basically be considered as any collection of routing domains that have an established way to the Internet. In most cases, it will be the only administrative domain and its routing domain autonomous system, sometimes also called the same domain. This is because network traffic gets to another administrative domain must usually go through the Internet to achieve a second administrative domain.

The way the routing domain works is the use of an explicitly established routing protocol. Inside there is any number of computers referred to as end systems (ES). Connecting to groups are usually routers or other network devices called medium systems (IS). These groups or subnet are referred to as the Middle System (ES-IS) end system. Protocols that group an intermediate systemY that share a common routing protocol are referred to as an intermediate system between damping on the middle system (IS-IS) protocol.

While the rules for routing domains specify that there is one routing protocol throughout the domain, there are occasional exceptions. For example, a single es can have a direct way to the IS. Technically, this can be considered as another routing protocol, as the route is set between EC and IS, although it does not interfere with the primary IS-IS IS-IS IS IS. In general, the IS-IS IS-IS-IS protocol is often referred to as the internal gate protocol (IGP).

Since it is possible to have multiple routing domains in one administrative domain, there are methods of connecting instances where more administrative domains must be connected. In this case, the protocol may be different from the protocol used by the routing domain to connect two administrative domains. This is known as the IS-IS protocol between the domain. While two administrative domains administered by a single administrativeThe source may exist, for security, they are usually connected through what is referred to as Border Gateway Protocol (BGP).