HTML, Hypertext Mark-up language, Writing web pages for display, CSS, Cascading style sheets, Defines how HTML elements are to be displayed. CSS files are stored separately from the HTML they affect., HTTPS, HTTP over SSL (secure sockets layer), This means HTTP but over a secure connection. Provides authentication between the web server and the client. This is much used in internet banking and similar services., POP, Post office protocol, This is the protocol used by email clients to retrieve email from a remote email server. It is simple to implement and generally removes email from the server and downloads it to store on the clients computer. POP is more or less obsolete these days having been largely replaced by IMAP. The last version was knows as POP3., HTTP, Hypertext transfer protocol, Client-server protocol for requesting (client) and delivering (server) resources such as HTML files., SMTP, Simple mail transfer protocol, This is an old standard for the transmission of email. Most modern email services have their own protocols for sending and administering emails but they are able to use SMTP in order to communicate with other proprietary systems. SMTP is only used to push or deliver mail onto a mail server., IMAP, Internet message access protocol, This is an alternative protocol for accessing email messages from a server. It is more capable than POP and allows complete management of the remote mailbox, FTP, File transfer protocol, This is used to send computer files from one host (node) to another over the internet or other TCP/IP network. FTP is commonly used for uploading web pages to web servers and is normally supplied as part of most web page editors..

Protocols Grouping Activity

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