Trivial File Transfer Protocol (TFTP)
Trivial File Transfer Protocol (TFTP)
is the stripped-down, stock version of FTP, but it’s the
protocol of choice if you know exactly what you want and where to find it, plus it’s so easy
to use and it’s fast too! It doesn’t give you the abundance of functions that FTP does, though.
TFTP has no directory-browsing abilities; it can do nothing but send and receive files. This
compact little protocol also skimps in the data department, sending much smaller blocks of
data than FTP, and there’s no authentication as with FTP, so it’s insecure. Few sites support
it because of the inherent security risks.
Simple Mail Transfer Protocol (SMTP)
Simple Mail Transfer Protocol (SMTP)
, answering our ubiquitous call to email, uses a spooled,
or queued, method of mail delivery. Once a message has been sent to a destination, the message
is spooled to a device—usually a disk. The server software at the destination posts a vigil, regularly
checking the queue for messages. When it detects them, it proceeds to deliver them to their
destination. SMTP is used to send mail; POP3 is used to receive mail.
Line Printer Daemon (LPD)
The Line Printer Daemon (LPD) protocol is designed for printer sharing. The LPD, along with
the Line Printer (LPR) program, allows print jobs to be spooled and sent to the network’s
printers using TCP/IP.
X Window
Designed for client/server operations,
X Window
defines a protocol for writing client/server
applications based on a graphical user interface (GUI). The idea is to allow a program, called
a client, to run on one computer and have it display things through a window server on
another computer.
Simple Network Managemen ...