Month: April 2000

Older versions of Windows used NetBIOS within a UDP or TCP packet. NetBIOS is used to interconnect Microsoft Windows machines. UDP Port 137 is NetBIOS name services (nbname) – This…

RDP stands for Remote Desktop Protocol. RDP uses TCP port 3389. With RDP you can share a desktop from a remote location. You can even take control of the remote…

Like POP3, IMAP is used to receive emails from an email server. The latest version of IMAP is IMAP4. IMAP4 stands for Internet Message Access Protocol version 4. IMAP4 uses…

POP3 stands for Post Office Protocol version 3. It uses TCP Port 110. POP3 provides a way to receive emails from an email server. POP3 has been around for a…

HTTP stand for Hypertext Transfer Protocol. HTTP uses TCP port 80. HTTP allows for web server communication. If you’re using a web browser to view internet pages, then you are…

DNS stands for Domain Name System. DNS uses UDP or TCP port 53. This protocol allows the use of DNS naming. Computers use numbers to identify each other, namely IP…

SMTP stands for Simple Mail Transfer Protocol. It uses TCP Port 25. SMTP is the protocol used to send outgoing email from a device to a mail server, or from…

Telnet stands for Telecommunicaton Network. Telnet uses TCP Port 23. Older equipment may not be able to support SSH so Telnet may be the only method of communication with that…

SSH stands for Secure Shell. SSH uses TCP Port 22. SSH is used to access a remote system’s terminal over a secure channel because the connection is encrypted. SSH provides…

FTP stands for File Transfer Protocol. As you can guess from the name, it’s used to transfer files between systems. FTP uses TCP Port 21 to control the communication of…