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Packet Tracer is a cross-platform visual simulation tool designed by Cisco Systems that allows users to create network topologies and imitate modern computer networks. The software allows users to simulate the configuration of Cisco routers and switches using a simulated command line interface.
Network topology is the arrangement of the elements (links, nodes, etc.) of a communication network. [1] [2] Network topology can be used to define or describe the arrangement of various types of telecommunication networks, including command and control radio networks, [3] industrial fieldbusses and computer networks.
X.25 is an ITU-T standard protocol suite for packet-switched data communication in wide area networks (WAN). It was originally defined by the International Telegraph and Telephone Consultative Committee (CCITT, now ITU-T) in a series of drafts and finalized in a publication known as The Orange Book in 1976.
[3] Ziegler's version has been used by teachers, journalists, and speech therapists, [ 2 ] and is often cited in discussions of internet publishing ethics. [ 1 ] It was twice set to music – once by a rapper, and once in a Gilbert and Sullivan style by a music teacher [ 1 ] – and part of it is recited in the closing credits of Canadian TV ...
Effective network management can provide positive strategic impacts. For example, in the case of developing an infrastructure, providing participants with some interactive space allows them to collaborate with each other, thereby promoting overall benefits.
802.1X-2001 defines two logical port entities for an authenticated port—the "controlled port" and the "uncontrolled port". The controlled port is manipulated by the 802.1X PAE (Port Access Entity) to allow (in the authorized state) or prevent (in the unauthorized state) network traffic ingress and egress to/from the controlled port.
Often the route a packet needs to take through a network is not immediately available. In that case, the packet is queued and waits until a link is free. The physical link technologies of packet networks typically limit the size of packets to a certain maximum transmission unit (MTU). A longer message may be fragmented before it is transferred ...
In the early 1970s, the term datagram was created by combining the words data and telegram by the CCITT rapporteur on packet switching, [1] Halvor Bothner-By. [2] [3] While the word was new, the concept had already a long history. In 1964, Paul Baran described, in a RAND Corporation report, a hypothetical military network having to resist a ...