Unit 3 Network Focus

Unit 3 Network Focus

1. Wireless Network

   • Factors affect speed of wireless network
     • Physical obstruction between
     • Bandwith available
     • Range between device and wireless access point

2. WAN/LAN

   • WAN
     • Wide Area Network
     • wide geographic area
     • uses external shared infrastructure
   • LAN
     • Local Area Network
     • Small geographic area

3. Router

   • tasks carried out
     • Recieved packets
     • Foward packets
     • Maintain a routing table
     • identify the most efficient path to the destination
     • Assign IP address to nodes
   • Connected to server

4. Virtual Memory

   • software governed network multiple physical networks can appear as one virtual network

5. Network protocol

   • define rules for data transmission
   • HTTP/HTTPS
     • HTTP
       • access and recieving web pages via the Internet
     • HTTPS
       • encrypts the information so that it cannot be understood by an eavesdropper
   • IMAP/POP
     • IMAP
       • leave the message on a server
     • POP
       • download every new message to your local device
   • SMTP
     • Use for sending e-mail