
Computer Network: A network is a group of computers connected together in a way that allows information to be exchanged between the computers.
Packet: A piece of a message transmitted over a packet-switching network.
LAN: Local area network (LAN) technologies connect many devices that are relatively close to each other, usually in the same building.
WAN: Wide area network (WAN) technologies connect a smaller number of devices that can be many kilometers apart.
Node: A node is anything that is connected to the network. While a node is typically a computer, it can also be something like a printer or CD-ROM tower.
Media Access Control (MAC): This is the physical address of any device -- such as the NIC in a computer -- on the network. The MAC address, which is made up of two equal parts, is 6 bytes long. The first 3 bytes identify the company that made the NIC. The second 3 bytes are the serial number of the NIC itself.
IP Address: Short for Internet Protocol Address. An IP address is an identifier for a computer or device on a TCP or IP network.
Bus Topology: A bus network is a network topology in which nodes are directly connected to a common linear (or branched) half-duplex link called a bus.
Ring Topology: A ring network is a network topology in which each node connects to exactly two other nodes, forming a single continuous pathway for signals through each node - a ring. Data travels from node to node, with each node along the way handling every packet.
Network Token: Can be several different things. In programming languages, a single element of a programming language. For example, a token could be a keyword, an operator, or a punctuation mark. In networking, a token is a special series of bits that travels around a token-ring network. In security systems, a small device the size of a credit card that displays a constantly changing ID code.
Star Topology: A star topology is a topology for a Local Area Network (LAN) in which all nodes are individually connected to a central connection point, like a hub or a switch. A star takes more cable than e.g. a bus, but the benefit is that if a cable fails, only one node will be brought down.
Tree Topology: A tree topology combines characteristics of linear bus and star topologies. It consists of groups of star-configured workstations connected to a linear bus backbone cable.
Protocol: An agreed-upon format for transmitting data between two devices.
Peer-to-Peer Architecture: Often referred to simply as peer-to-peer, or abbreviated P2P, a type of network in which each workstation has equivalent capabilities and responsibilities.
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Computer Network: A network is a group of computers connected together in a way that allows information to be exchanged between the computers.
Packet: A piece of a message transmitted over a packet-switching network.
LAN: Local area network (LAN) technologies connect many devices that are relatively close to each other, usually in the same building.
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