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Delay-tolerant networking. Delay-tolerant networking ( DTN) is an approach to computer network architecture that seeks to address the technical issues in heterogeneous networks that may lack continuous network connectivity. Examples of such networks are those operating in mobile or extreme terrestrial environments, or planned networks in space.
1. Physical layer. The Open Systems Interconnection ( OSI) model is a reference model from the International Organization for Standardization (ISO) that "provides a common basis for the coordination of standards development for the purpose of systems interconnection." [ 2] In the OSI reference model, the communications between systems are split ...
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 ...
Internetworking is the practice of interconnecting multiple computer networks, [ 1]: 169 such that any pair of hosts in the connected networks can exchange messages irrespective of their hardware-level networking technology. The resulting system of interconnected networks is called an internetwork, or simply an internet .
Firewall (computing) In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. [ 1][ 2] A firewall typically establishes a barrier between a trusted network and an untrusted network, such as the Internet. [ 3]
In computer networking, a peer group is a group of functional units in the same layer (see e.g. OSI model) of a network, by analogy with peer group. See also peer-to-peer (P2P) networking which is a specific type of networking relying on basically equal end hosts rather than on a hierarchy of devices. Categories: Network software stubs.
Computer network diagram. A computer network diagram is a schematic depicting the nodes and connections amongst nodes in a computer network or, more generally, any telecommunications network. Computer network diagrams form an important part of network documentation.
Retransmission (data networks) Retransmission, essentially identical with automatic repeat request (ARQ), is the resending of packets which have been either damaged or lost. Retransmission is one of the basic mechanisms used by protocols operating over a packet switched computer network to provide reliable communication (such as that provided ...