1.3.1 computer science

1.3.1 computer science

1. LAN

   • a group of computers connected to one network in one geographical site.
   • WAN
     • a group of networks connected on several geographical sites.

2. Factors that affect network performance

   • bandwidth
     • The higher the bandwidth the faster the rate of transmission.
   • number of devices on the network
     • the higher the number of devices connected the larger the interference.
   • network latency
     • the longer the period of time delay the slower the rate of transmission
     • type of network traffic
       • The higher the network traffic the larger the interference

3. Network hardware

   • Wireless access point
     • Router
       • hub
         • takes in data on a network and sends it to all computers connected
       • collects knowledge of available routes to determine the most suitable routes
     • Allows devices to connect wirelessly
   • modem
     • allows the computer to send and receive data over a telephone cable converting digital signals into analogue to send down the line.
     • NIC
       • allows devices to connect to the network. It has a transmitter and receiver for radiowaves.
     • switch
       • transports data across a network with the uses of MAC adresses.

4. Wired and wireless networks