4. SSH
Secure Shell (SSH) is a coded network protocol
for secure data communication, remote
command-line login, remote command
execution.
5. POP3
A protocol for receiving e-mail by downloading it
to your computer from a mailbox on the server
of an Internet service provider.
6. NTP
Network Time Protocol (NTP) is a protocol that
is used to synchronize computer clock times in a
network of computers. NTP uses Coordinated
Universal Time (UTC) to synchronize computer
clock times to a millisecond, and sometimes to a
fraction of a millisecond.
7. SSL
Secure Sockets Layer (SSL) is a commonly-used
protocol for managing the security of a message
communication on the Internet.
8. SMS
Short Message Service (SMS) is a text messaging
service component of phone, Web, or mobile
communication systems. It uses standardized
communications protocols to allow fixed line or
mobile phone devices to exchange short text
messages.
