Cheatography
https://cheatography.com
common protocols for OCR GCSE computing
protocol
a protocol governs the transport of data on the internet |
common protocols
|
TCP - transmission control protocol breaks up messages, reassembles, detects errors and resends lost messages
|
|
IP- internet protocol routes packets around the internet from one IP address to another
|
|
HTTP- hypertext transfer protocol used for accessing and receiving webpages
|
|
HTTPS - hypertext transfer protocol secure the information is encrypted so if it intercepted it cannot be understood
|
|
FTP- file transfer protocol used for sending and receiving files
|
|
IMAP- Internet message access protocol leaves mesage on the server and syncs with all of your devices, can only be deleted if user deletes email
|
|
POP/3- post office protocol/3 downloads every new message to local device so it is no longer available on the server
|
|
SMTP- simple mail transfer protocol used for sending emails
|
the TCP/IP protocol stack aka layers
application layer |
applications such as email clients and web browsers create data to send in this layer. SMTP, FTP and HTTP operate in this layer |
transport layer |
the transport layer creates the connection between two computers, or ‘hosts’. data is then divided up into packets and given a packet number. packets are reassembled by the recipient’s transport layer. lost packets are resent. This layer uses TCP. |
internet layer |
the Internet layer is responsible for routing packets. routers operate on this layer |
link layer |
the link layer is responsible for transporting information between nodes on the network. |
advantages:
- self-contained
- the functionality of one layer can be changed without affecting another
- senders and receivers can use different hardware and software but can communicate using the same layer protocols
|
Created By
Metadata
Comments
No comments yet. Add yours below!
Add a Comment
Related Cheat Sheets
More Cheat Sheets by ghcytdckyc