2.7 Protocols

2.7 Protocols

1. tcp

   • transmission control protocol
     • this establishes an connection between devices on a network
   • very reliable , as every packet of data can be transmitted

2. udp(user data protocol)

   • unreliable as not all packets of data will be sent or received
   • sets up network connection just like TCP, but this one is unrelable

3. IP (internet protocol address)

   • determines the fields of data (sent in packets)
   • destination- which is the IP address and it also sends the actual data which is being sent
   • needs to know the ip address of the receiving user.

4. SMTP(simple mail transfer protocol)

   • used for when you want to send emails etc
     • when it is sent it never goes straight to the recipient it always goes through a mail server
       • this is sotred until the recipient is online
         • email does not go directly from sender to recipeint
       • directs mail to mail servers over the internet
   • POP3 (post office protocol)
     • allows users to receive mail from mail server
       • when the recipient/ receiver get s the email it is removed from the mail server.

5. FTP(FILE TRANSFER PROTOCOL)

   • E.G transfer of files from client computer to the web server

6. HTTP(HYPER TEXT TRANSFER PROTOCOL)

   • determines how files that make up web pages are exchanged

7. SNMP(SIMPLE NETWORK MANAGING PROTOCOL)

   • Allows certain admin devices to see information on all devices on a network.

8. ICMP(INTERNET CONTROL MESSAGE PROTOCOL)

   • alerts any devices of errors and will specify what it was and a possible fix solution.