Telecommunications, the internet, and wireless technology Telecommunications and networking in today’s business world What is a computer network? The connection medium for linking network components can be a telephone wire, coaxial or radio signal. The network operating system (NOS) routes and manages communications on the network and coordinates network resources It can reside on every computer in the network, or it can reside primarily on a dedicated server computer for all the applications on the network A server is a computer on a network that performs important network functions for client computers, such as webhosting, storing data, and storing the NOS Hubs connect network components, sending a packet of data to all other connected devices A switch has more intelligence than a hub and can filter and forward data to a specified destination on the network A router is a communications processor used to route packets of data through different networks Key digital networking technologies Contemporary digital networks and the internet are based on 3 key technologies: Client/server computing Packet switching is a method of slicing digital messages into parcels called packets, sending the packets along different communication paths as they become available, and then reassembling the packets once they arrive at their destinations In circuit-switched networks, such as the telephone system, a complete point-to-point circuit is assembled, and then communication can proceed TCP/IP and connectivity A protocol is a set of rules and procedures governing transmission of information between 2 points in a network TCP/IP was developed during the early 70s to support DARPA efforts to help scientists transmit data among different types of computers over long distances TCP/IP uses a suite of protocols, mainly TCP and IP TCP handles the movement of data between computers TCP establishes a connection between the computers, sequences the transfer of packets, and acknowledges the packets sent IP is responsible for the delivery of packets and includes the disassembling and reassembling of packets during transmission TCP/IP layers: Application layer
Telecommunications, the internet, and wireless technology Telecommunications and networking in today’s business world What is a computer network? The connection medium for linking network components can be a telephone wire, coaxial or radio signal. The network operating system (NOS) routes and manages communications on the network and coordinates network resources It can reside on every computer in the network, or it can reside primarily on a dedicated server computer for all the applications on the network A server is a computer on a network that performs important network functions for client computers, such as webhosting, storing data, and storing the NOS Hubs connect network components, sending a packet of data to all other connected devices A switch has more intelligence than a hub and can filter and forward data to a specified destination on the network A router is a communications processor used to route packets of data through different networks Key digital networking technologies Contemporary digital networks and the internet are based on 3 key technologies: Client/server computing Packet switching is a method of slicing digital messages into parcels called packets, sending the packets along different communication paths as they become available, and then reassembling the packets once they arrive at their destinations In circuit-switched networks, such as the telephone system, a complete point-to-point circuit is assembled, and then communication can proceed TCP/IP and connectivity A protocol is a set of rules and procedures governing transmission of information between 2 points in a network TCP/IP was developed during the early 70s to support DARPA efforts to help scientists transmit data among different types of computers over long distances TCP/IP uses a suite of protocols, mainly TCP and IP TCP handles the movement of data between computers TCP establishes a connection between the computers, sequences the transfer of packets, and acknowledges the packets sent IP is responsible for the delivery of packets and includes the disassembling and reassembling of packets during transmission TCP/IP layers: Application layer
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