T3 - Protocols and layers: Flashcards
Protocols
- set of rules
HTTP
– Hypertext Transfer Protocol
HTTPS –
Hypertext Transfer Protocol Secure
FTP –
File Transfer Protocol
POP –
Post Office Protocol
IMAP –
Internet Message Access Protocol
SMTP –
Simple Mail Transfer Protocol
TCP/IP –
Transmission Control Protocol /
Internet Protocol
HTTP use
used for accessing and receiving web pages via the Internet - written in HTML
protocol requests a web page from the
web server
The server sends its response with the web page
HTTPS (secure HTTP) use
encrypts the information so that it cannot be understood by an eavesdropper
Websites using HTTPS =
Banks or online shops
FTP: role
used for sending or retrieving files to or from a FTP server
How email works:
email is sent from a computer it will first be sent to a mail server using the SMTP protocol
When it reaches the destination mail server it is stored
The user’s computer uses POP or IMAP to access the email
POP and IMAP:
email retrieval protocols fetch message data and attachments from your remote mail server
POP: role
will download every new message to your local device and delete from local server