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An internetwork is the connection of multiple different types of computer networks to form a single computer network using higher-layer network protocols and connecting them together using routers. The Internet is the largest example of internetwork. It is a global system of interconnected governmental, academic, corporate, public, and private ...
Local area network. A local area network ( LAN) is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building. [ 1] By contrast, a wide area network (WAN) not only covers a larger geographic distance, but also generally involves leased telecommunication ...
Router (computing) 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. When a data packet comes in on a line, the router reads the network address ...
Networking cable is a piece of networking hardware used to connect one network device to other network devices or to connect two or more computers to share devices such as printers or scanners. Different types of network cables, such as coaxial cable , optical fiber cable , and twisted pair cables, are used depending on the network's topology ...
Firewall (computing) In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. [ 1][ 2] A firewall typically establishes a barrier between a trusted network and an untrusted network, such as the Internet. [ 3]
The textbook definition of a WAN is a computer network spanning regions, countries, or even the world. [3] [4] However, in terms of the application of communication protocols and concepts, it may be best to view WANs as computer networking technologies used to transmit data over long distances, and between different networks.
In computer networking, a port or port number is a number assigned to uniquely identify a connection endpoint and to direct data to a specific service. At the software level, within an operating system, a port is a logical construct that identifies a specific process or a type of network service. A port at the software level is identified for ...
A network switch (also called switching hub, bridging hub, Ethernet switch, and, by the IEEE, MAC bridge[ 1]) is networking hardware that connects devices on a computer network by using packet switching to receive and forward data to the destination device. A network switch is a multiport network bridge that uses MAC addresses to forward data ...