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1. Physical layer. v. t. e. Intermediate System to Intermediate System (IS-IS, also written ISIS) is a routing protocol designed to move information efficiently within a computer network, a group of physically connected computers or similar devices. It accomplishes this by determining the best route for data through a packet switching network.
Router (computing) Rack containing a service-provider–class router connected to multiple networks. A router[a] is a computer and networking device that forwards data packets between computer networks, including internetworks such as the global Internet. [2][3][4] A router is connected to two or more data lines from different IP networks.
The link-state protocol is performed by every switching node in the network (i.e., nodes which are prepared to forward packets; in the Internet, these are called routers). [3] The basic concept of link-state routing is that every node constructs a map of the connectivity to the network in the form of a graph , showing which nodes are connected ...
The Internet backbone is the principal data routes between large, strategically interconnected computer networks and core routers of the Internet. These data routes are hosted by commercial, government, academic and other high-capacity network centers as well as the Internet exchange points and network access points, which exchange Internet ...
Route flapping. In computer networking and telecommunications, route flapping occurs when a router alternately advertises a destination network via one route then another, or as unavailable and then available again, in quick sequence. Route flapping is caused by pathological conditions (hardware errors, software errors, configuration errors ...
Virtual routing and forwarding. In IP-based computer networks, virtual routing and forwarding (VRF) is a technology that allows multiple instances of a routing table to co-exist within the same router at the same time. One or more logical or physical interfaces may have a VRF and these VRFs do not share routes.
Networking hardware, also known as network equipment or computer networking devices, are electronic devices that are required for communication and interaction between devices on a computer network. Specifically, they mediate data transmission in a computer network. [1] Units which are the last receiver or generate data are called hosts, end ...
Router R1 is a one-armed router carrying out inter-VLAN routing. A router on a stick, also known as a one-armed router, [1][2] is a router that has a single physical or logical connection to a network. It is a method of inter- VLAN routing where one router is connected to a switch via a single cable. The router has physical connections to the ...