connectivity

• Wired has HIGHER DATA TRANSFER SPEEDS, but Wireless has greater FREEDOM WITH MOBILITY
• Circuit switching


  Circuit switching requires a connection to be made between sending and receiving nodes, then all data uses this route. No other data uses the route until the communication has finished.
• Circuit switching used to be used for all phone calls, which meant you got an "engaged" tone if the phone being called was in use. Nowadays, packet switching on the phone network allows you to have call waiting, switch calls and have conference calls between more than 2 people.
• Circuit switching


  • Advantages
  • Disadvantages
• Packet switching


  A packet is a collection of data that is transmitted over a packet-switched network. Packet switching is the process of delivering packets from one computer system to another using a designated device, such as a switch or router.

  
• The process of sending data over a network in packets


  1. The message is broken down into a sequence of packets, which are sent in order

  2. The data is packaged together with control information

  3. Each node (switch) on the network will route the packets according to its routing table

  4. The packets may take different routes to their destination and so may arrive out of order, so are re-ordered on arrival

  5. When all the packets have arrived the data is reassembled and checked for accuracy

  
• what is circuit switching
• contents of whats in packet switching