Network Protocols

Network Protocols

1. Mac Adresses

   • Every device needs a unique identifier so it can be found on a network.
   • Assigned to all network-enabled devices by the maufacturer.They are unique to the device and cannot be changed.
   • They are 48 or 64-bit binary numbers.To make them easier to use theyre converted into hexadecimal.
   • Mainly used by Ethernet protocol on LANs.LAN switches read the MAC addresses and use them to direct data to the right device.

2. IP Addresses

   • Used when sending data between TCI/IP networks, e.g. over the Internet.
   • IPv4(32bits)
   • IPv6(128bits)
   • Assigned either manually or automatically before the device can acces the network.
   • Two versions of IP addresses.

3. HTTP-Hyper Text Transfer Protocol-Used by web browsers to acces websites and communicate with web servers.

4. HTTPS-HTTP secure-A more secure version of HTTP-Encrypts all information sent and recieved.

5. FTP-File Transfer Protocol-Used to access, edit and move files betwen devices on a network, e.g. to access files on a server from a client computer.

6. POP3-Post Office Protocol, version 3-Used to retrieve emails from a server. The server holds the email until you download it, at which point it is deleted from the server.

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