Internet Protocols and Network hardware

Internet Protocols and Network hardware

1. Ethernet

   • basic protocols used in LAN
   • made up of:
     • Devices that send or receive data
     • Network devices
     • medium that connects the devices

2. TCP/IP

   • TCP
     • ensure data is transmitted acurately
   • IP
     • ensures delivered to the right address
   • computers have IP Address
     • Unique
   • data is divided into packets
     • if packed has not arrived, it will send another copy, duplicates are deleted

3. Handshaking

   • protocol in which computers recognize each other
     • 1. physical link set up
       • 2.protocols are shared and set up
         • ie. the rate of data transfer, the parity check, the alphabet code, how interrupts will be caried out
           • a even parity is a check to make sure the data sent in acurate

4. UDP

   • connectionless service
     • no handshaking
     • no means to check if data has arrived to computer

5. FTP

   • used to transfere data from one computer to another
     • need to log in the server
   • no security

6. HTTP

   • protocall to transfer data across the internet
   • computer makes request to server using http generally use of browser

7. Telnet

   • used within the internet or a LAN
     • Same layer as FTP
   • Main purpose is to gain access to another computer and use the software in its computer
     • User computer emulate other computer

8. SSH

   • allows data to be exchanged securely between 2 computers
   • ssh provides many fetures of telnet but allows more security
     • uses public key authentacation

9. Protocols are a set of rules data packets must follow when moving through a network

10. Network Devices

    • switch/hub
    • routers
    • servers
    • Network interface card
    • dedicated cabelling