Functionality with Telnet and rlogin protocols, but unlike them, encrypts all traffic, including transmitted passwords. SSH is an application-level network protocol that allows remote control of the operating system and tunneling of TCP connections. SMTP is used to send outgoing mail using TCP port 25. SMTP was first described in RFC 821 (1982) the latest update in RFC 5321 (2008) includes a scalable extension, ESMTP. SMTP (Simple Mail Transfer Protocol) is a simple network mail transfer protocol designed for sending email over TCP / IP networks. SMB is an application-level network protocol for remote access to files, printers and other network resources, as well as for interprocess communication. Unlike TFTP, it guarantees transmission (or the generation of an error) due to the use of an acknowledged protocol. Today it is widely used for software distribution and access to remote hosts. IMAP only works with messages and does not require any packets with special headers.įile Transfer Protocol - a file transfer protocol over a network, is one of the oldest application protocols that appeared long before HTTP, and even before TCP/IP.
It is based on the TCP transport protocol and uses port 143, and IMAPS uses port 993. IMAP is an application layer protocol for accessing email. Most prominently, it translates more readily memorized domain names to the numerical IP addresses needed for locating and identifying computer services and devices with the underlying network protocols. It associates various information with domain names assigned to each of the participating entities. The Domain Name System (DNS) is a hierarchical and decentralized naming system for computers, services, or other resources connected to the Internet or a private network.
HTTP (HyperText Transfer Protocol) is an application layer data transfer protocol, a protocol of client-server interaction, which means initiating requests to the server by the recipient, usually a web browser (web-browser).
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