A computer network is a group of two or more computer systems linked together. Examples include local-area networks (LANs) and wide-area networks (WANs). Network of Networks in the Canadian clinical trials landscape, and network with other clinical research groups faced with similar challenges and opportunities. We witnessed the revolution of network science in and started with small-world and scale-free networks having now thousands of  ‎Abstract · ‎FRAMEWORK OF TWO · ‎FRAMEWORK FOR A · ‎EXTREME.


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Network of Networks

Network Characteristics In addition to these types, the following characteristics are also used to categorize network of networks types of networks: The geometric arrangement of a computer system.

Common topologies include a bus, starand ring. See the Network topology diagrams in the Quick Reference section of Webopedia.


The protocol defines a common set of rules and signals that computers on the network use to communicate. One of the most popular protocols for LANs is called Ethernet.

You can also search network of networks programs and networks and see how they are related across different institutions. It was implemented in real network of networks in Node networking Apart from any physical transmission media there may be, networks comprise additional basic system building blocks, such as network interface controllers NICsrepeatershubsbridgesswitchesroutersmodemsand firewalls.

Computer network

Any particular piece of equipment will network of networks contain multiple building blocks and perform multiple functions. Network interfaces[ edit ] An ATM network interface in the form of an accessory card.

  • What is a Computer Network? Webopedia Definition
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  • Top 5 Network Related Questions

A lot of network interfaces are built-in. A network interface controller NIC is computer hardware that provides network of networks computer with the ability to access network of networks transmission media, and has the ability to process low-level network information.

For example, the NIC may have a connector for accepting a cable, or an aerial for wireless transmission and reception, and the associated circuitry. In Ethernet networks, each network interface controller has a unique Media Access Control MAC address—usually stored in the controller's permanent memory.


The size of an Ethernet MAC address is six octets. The three most significant octets are reserved to identify NIC manufacturers. These network of networks, using only their assigned prefixes, uniquely assign the three least-significant octets of every Network of networks interface they produce.

Repeaters and hubs[ edit ] A repeater is an electronic device that receives a network signalcleans it of unnecessary noise and regenerates it.

The signal is retransmitted at a higher power level, or to the other side of an obstruction, so that the signal can cover longer distances without network of networks. In most twisted pair Ethernet configurations, repeaters are required for cable that runs longer than meters.

With fiber optics, repeaters can be tens or even hundreds of kilometers apart. A repeater with multiple ports is known as an Ethernet hub. Repeaters work on the physical layer of the OSI network of networks.

Repeaters require a small amount of time to regenerate the signal. This can cause a propagation delay that affects network performance and may affect proper function. As a result, many network architectures limit the number of repeaters that can be used in a row, e. Hubs and repeaters in LANs have been mostly obsoleted by modern network of networks.