IT: Chapter 6:Teecommunications, the Internet, and Wireles Technology Flashcards
Convergence
Telephone networks and computer networks converging into single digital network using Internet Standards
Computer Network
consists of two or more connected computers
Server Computer
performs important network functions for client computers
Network Operating System
routes and manages communications on the network and coordinates network resources
Hubs
connect network components, sending a packet of data to all other connected devices
Switch
more intelligence than a hub and can filter and forward data to a specified destination on the network
Routers
a communications processor used to route packets of through different networks, ensuring that the data sent gets to the correct address.
Client/Server Computing
a distributed computing model in which some of the processing power is located within small, inexpensive client computers, and resides on desktops, laptops, or handheld devices.
Packet Switching
a method of slicing digital messages into parcels called packets, sending the packets along different communication paths as they become available, and then reassembling packets at destination
Transmission Control Protocol/Internet Protocol (TCP/IP)
connectivity between computers enabled by protocols
Protocols
set of rules and procedures governing transmission of information between two points in a network
Transmission Control (TCP)
establishes a connection between the computers, sequences the transfer of packets, and acknowledges the packets sent.
Internet Protocol (IP)
responsible for the delivery of packets and includes the disassembling and reassembling of packets during transmission
Application Layer
Transport Layer
Internet Layer
Network Layer
Four layers for TCP/IP
Application layer
enables client application programs to access the other layers and defines the protocols that applications use to exchange data.
Transport layer
responsible for providing the Application layer with communication and packet services
Internet layer
responsible for addressing, routing, and packaging data packets called IP datagrams
Network Interface Layer
responsible for placing packets on and receiving them from the network medium, which could be any network technology
Analog Signal
represented by a continuous waveform that passes through a communications medium and has been used for voice communications
Digital signal
discrete, binary waveform, rather than a continuous waveform, uses one bit and zero bits
Modem
translates digital signals into analog form so that computers can transmit data over analog networks such as telephone and cable networks
Local-area networks (LANs)
to connect personal computer and other digital devices within a half-mile or 500-meter radius
Peer-to-peer
treats all processors equally and is used primarily in small networks with 10 or fewer users
Topologies
the way components are connected together