Exercise

• Circuit Switching


  a direct link is created between the sending and receiving devices, which is maintained for the duration of the conversation (e.g. phone calls). Dedicated pathways to transmit data packets from one device to another across a network. No other devices in the network can use the same pathway until the data transmission is completed.
• Packet Switching


  a mode of data transmission in which a message is broken into a number of parts that are sent independently, over whatever route is optimum for each packet, and reassembled at the destination. Data packets can take any available path across the network, no set direct pathway.
• Frame relay


  An international standard data-link protocol that defines the capabilities to create a frame-switched (packet-switched) service, allowing DTE devices (typically routers) to send data to many other devices using a single physical connection to the Frame Relay service.
• TCP


  a connection is created and maintained until the application software has finished exchanging data at each endpoint. It determines how data is broken down into packets, which it gives to and receives from the network layer in the TCP/IP model. It is responsible for providing error-free data transmission and managing data flow.
• Message switching


  All data packets are sent along the same path. Data is divided into packets, similar to packet switching, except these messages may be stored and then forwarded. The data packets are sent to the first switch device and it holds the packets until all of them have arrived. the switch then sends them onto the next switch until they reach the receiving device.
• Router


  a network component that uses a computer's IP address to send data packets to a destination outside the current network