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Data in the header is used by networking hardware to direct the packet to its destination, where the payload is extracted and used by an operating system, application software, or higher layer protocols. Packet switching is the primary basis for data communications in computer networks worldwide.
IBM Network Control Program (NCP) [11] [12] is a communications program running on the 3705 and subsequent 37xx communications processors that, among other things, implements the packet switching protocol defined by SNA. The protocol performed two main functions:
The network transfers the data from switch to switch when it is convenient to do so, as such the data is not transferred in real-time. Blocking can not occur, however, long delays can happen. The source and destination terminal need not be compatible, since conversions are done by the message switching networks. A message switch is ...
In computer networking and telecommunications, a switched communication network is a communication network which uses switching for connection of two non-adjacent nodes. Switched communication networks are divided into circuit switched networks, message switched networks, and packet switched networks.
Within any network enabled device (e.g. router, switch, network element or terminal such as a computer or smartphone) it is the packet processing subsystem that manages the traversal of the multi-layered network or protocol stack from the lower, physical and network layers all the way through to the application layer.
A network operating system (NOS) is a specialized operating system for a network device such as a router, switch or firewall.. Historically operating systems with networking capabilities were described as network operating systems, because they allowed personal computers (PCs) to participate in computer networks and shared file and printer access within a local area network (LAN).
A device capable of more than bridging is known as a multilayer switch. A layer 2 network device is a multiport device that uses hardware addresses (MAC addresses) to process and forward data at the data link layer (layer 2). A switch operating as a network bridge may interconnect otherwise separate layer 2 networks.
A digital communications network for computers giving rapid response at remote terminals. ACM Symposium on Operating Systems Principles. Scantlebury, R. A.; Wilkinson, P.T. (1971). The design of a switching system to allow remote access to computer services by other computers and terminal devices. Proceedings of the 2nd Symposium on Problems in ...