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  2. CCNA - Wikipedia

    en.wikipedia.org/wiki/CCNA

    CCNA. CCNA ( Cisco Certified Network Associate) is an entry-level information technology (IT) certification offered by Cisco Systems. CCNA certification is widely recognized in the IT industry as the foundational step for careers in IT positions and networking roles. [ 1][ 2] Cisco exams routinely change in response to evolving IT trends. [ 3]

  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. Wireless LAN - Wikipedia

    en.wikipedia.org/wiki/Wireless_LAN

    This notebook computer is connected to a wireless access point using a PC Card wireless card. An example of a Wi-Fi network. A wireless LAN (WLAN) is a wireless computer network that links two or more devices using wireless communication to form a local area network (LAN) within a limited area such as a home, school, computer laboratory, campus, or office building.

  5. Network simulation - Wikipedia

    en.wikipedia.org/wiki/Network_simulation

    In computer network research, network simulation is a technique whereby a software program replicates the behavior of a real network. This is achieved by calculating the interactions between the different network entities such as routers, switches, nodes, access points, links, etc. [1] Most simulators use discrete event simulation in which the modeling of systems in which state variables ...

  6. Social media - Wikipedia

    en.wikipedia.org/wiki/Social_media

    The PLATO system was launched in 1960 at the University of Illinois and subsequently commercially marketed by Control Data Corporation.It offered early forms of social media features with innovations such as Notes, PLATO's message-forum application; TERM-talk, its instant-messaging feature; Talkomatic, perhaps the first online chat room; News Report, a crowdsourced online newspaper, and blog ...

  7. Ethernet - Wikipedia

    en.wikipedia.org/wiki/Ethernet

    Ethernet ( / ˈiːθərnɛt / EE-thər-net) is a family of wired computer networking technologies commonly used in local area networks (LAN), metropolitan area networks (MAN) and wide area networks (WAN). [ 1] It was commercially introduced in 1980 and first standardized in 1983 as IEEE 802.3. Ethernet has since been refined to support higher ...

  8. List of TCP and UDP port numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_TCP_and_UDP_port...

    TCP: Allow traffic to all destinations on ports: 28910, 29900, 29901, 29920, 80, and 443. UDP: Allow all traffic to all destinations. (Necessary for peer-to-peer connections and game play). ... ^ "Ports Used for Call of Duty Games". Activision Support.

  9. Internet - Wikipedia

    en.wikipedia.org/wiki/Internet

    The Internet (or internet) [ a] is the global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) [ b] to communicate between networks and devices. It is a network of networks that consists of private, public, academic, business, and government networks of local to global scope, linked by a broad array of ...