Networks

• Factors that affect the performance of a network


  • Number of devices on the network
  • Bandwidth of the transmission medium
  • Type of network traffic
  • Network latency
  • Number of transmission errors
• Router


  Connects devices on a LAN and connects LANs to WANs
• WAP


  Provides wireless access to devices
• NIC


  A device (often on the motherboard) that allows it to connect to a network. Also the MAC address is stored here
• Switch


  Stores the MAC address of devices on a network and filter data packets - intelligently
• How a DNS server works

  1. Browser sends url to DNS

  2. DNS returns IP to browser

  3. Browser sends IP to web server

  4. Web server returns web page to browser
• Hosting


  Storing file and data on a web server. Often known as a host
• Types of hosts


  • Media hosts
  • Email hosts
  • Web hosts