Network Address Port Translation (NAPT)
NAPT is a special case of NAT, where internal IP numbers are hidden behind a single external addresses, allowing you to connect many local users to the Internet with a
NTP
Network Time Protocol. A standard for synchronizing your system clock with the true time, defined as the average of many
Password Authentication Protocol (PAP)
A basic form of authentication, in which a user’s name and password are transmitted over a network and compared to a table of
PBX
Short for Private Branch eXchange, a private telephone network used within an enterprise. Users of the PBX share a certain number of outside lines for making telephone calls external to the PBX
Ping
A utility used to determine whether a specific IP address is accessible. It works by sending a packet to the specified address and waiting for a reply
POP3
Post Office Protocol 3. A protocol that provides a simple, standardized way for users to access mailboxes and download messages to their computers
POTS
Short for Plain Old Telephone Service, which refers to the standard telephone service that most homes use. In contrast, telephone services based on
Point-to-Point Protocol over Ethernet (PPPoE)
A protocol for connecting remote hosts to the Internet over an
PSTN
34
