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  2. Communications system - Wikipedia

    en.wikipedia.org/wiki/Communications_system

    Communication system An electronic communications system using electronic signals. A communications system or communication system is a collection of individual telecommunications networks systems, relay stations, tributary stations, and terminal equipment usually capable of interconnection and interoperation to form an integrated whole.

  3. Computer network - Wikipedia

    en.wikipedia.org/wiki/Computer_network

    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 ...

  4. OSI model - Wikipedia

    en.wikipedia.org/wiki/OSI_model

    The model partitions the flow of data in a communication system into seven abstraction layers to describe networked communication from the physical implementation of transmitting bits across a communications medium to the highest-level representation of data of a distributed application. Each intermediate layer serves a class of functionality ...

  5. Telecommunications network - Wikipedia

    en.wikipedia.org/wiki/Telecommunications_network

    The collection of addresses in the network is called the address space of the network. Examples of telecommunications networks include computer networks, the Internet, the public switched telephone network (PSTN), the global Telex network, the aeronautical ACARS network, [1] and the wireless radio networks of cell phone telecommunication providers.

  6. Duplex (telecommunications) - Wikipedia

    en.wikipedia.org/wiki/Duplex_(telecommunications)

    A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions. Duplex systems are employed in many communications networks, either to allow for simultaneous communication in both directions between two connected parties or to provide a reverse path for the monitoring and remote adjustment ...

  7. Node (networking) - Wikipedia

    en.wikipedia.org/wiki/Node_(networking)

    In the fixed telephone network, a node may be a public or private telephone exchange, a remote concentrator or a computer providing some intelligent network service. In cellular communication, switching points and databases such as the base station controller, home location register, gateway GPRS Support Node (GGSN) and serving GPRS support ...

  8. Network architecture - Wikipedia

    en.wikipedia.org/wiki/Network_architecture

    The Open Systems Interconnection model (OSI model) defines and codifies the concept of layered network architecture. Abstraction layers are used to subdivide a communications system further into smaller manageable parts. A layer is a collection of similar functions that provide services to the layer above it and receives services from the layer ...

  9. Telecommunications link - Wikipedia

    en.wikipedia.org/wiki/Telecommunications_link

    Traffic and signalling flowing within the base station subsystem (BSS) and network switching subsystem (NSS) may also be identified as uplink and downlink. Pertaining to computer networks, a downlink is a connection from data communications equipment toward data terminal equipment. This is also known as a downstream connection.