Network protocols 3
- Created by: Tomiwaq
- Created on: 02-04-19 18:21
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- Network protocols
- TCP / IP
- It is the protocol which dictates how data is sent between networks
- It is made up of 2 protocols
- Transmission Control Protocol
- Sets the rules foe how devices connect to the network
- It's in charge of splitting data into packets and reassembling them
- It's in charge of checking if the data has been correctly sent and delivered
- Internet protocol
- Responsible for packet switching
- Other protocols
- Hyper Text Transfer Protocol Secure (HTTPS)
- Used by web browsers to securely access websites
- File Transfer Protocol
- Used to access, edit and move files between devices on a network
- Post Office Protocol 3 (POP3)
- Used to retrieve emails from a server
- Internet Message Access Protocol (IMAP)
- Used to retrieve emails from a server which holds the email until you actually delete it
- Simple Mail Transfer Protocol (SMTP)
- Used to send emails
- Hyper Text Transfer Protocol Secure (HTTPS)
- Layers
- A layer is a group of protocols which have similar functions
- Layers are self-contained
- Each layer serves the layer above it
- The 4 layers
- Layer 1 - Data link layer
- Passing data over the physical network e.g. ethernet
- Layer 2 - Network layer
- Making connections between networks, directing data packets and handling traffic e.g. IP
- Layer 3 - Transport layer
- Controlling data flow e.g. TCP
- Layer 4 - Application layer
- Turning data into websites and other apps e.g. HTTP
- Layer 1 - Data link layer
- Advantages
- It breaks network communication into manageable pieces
- They can be changed without the other layers being affected
- Having set rules for each layer means it is compatible with other companies
- TCP / IP
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