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A computer network is a set of computers sharing resources and communicating over digital interconnections. Learn about the origins, features, types, and applications of computer networks from this comprehensive encyclopedia article.
Network architecture is the design of a computer network, including its physical components, functional organization, communication protocols, and services. Learn about the OSI model, distributed computing, and network topology concepts related to network architecture.
Learn how to create and read schematic diagrams of computer networks or telecommunications networks. See examples of different network symbols, topologies and scales.
CCNA (Cisco Certified Network Associate) is an entry-level IT certification that tests network fundamentals, access, connectivity, security, and automation skills. Learn about the exam content, prerequisites, expiry, and training methods for CCNA certification.
The OSI model is a reference model that divides network communication into seven abstraction layers, from physical to application. It defines the functions and protocols of each layer, and is used to standardize network interconnection and interoperability.
A network interface normally does not accept packets addressed to other Ethernet stations. [c] [d] An EtherType field in each frame is used by the operating system on the receiving station to select the appropriate protocol module (e.g., an Internet Protocol version such as IPv4).
Learn about the electronic devices that are required for communication and interaction between devices on a computer network. Find out the types, functions and examples of networking hardware, such as routers, switches, bridges, firewalls and more.
A computer network diagram of client computers communicating with a server computer via the Internet Wikimedia Foundation rackmount servers on racks in a data center The first WWW server is located at CERN with its original sticker that says: "This machine is a server.
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