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POP3 server <POP3 server>

Reading: Pop three server
Field:
Internet > mail > POP3 server

The server in order to receive E-mail. Presently most the mail reception protocol which has spread (protocol) those which correspond to POP3 which is.

As for the POP3 server, in case of the student in case of the university and the office worker ahead attending school in case of enterprise and the home user ahead working Internet service provider which it has made a contract possesses, is operational.

The case where sending and receiving it does E-mail, by way of the computer which is called the server who always is connected on Internet.

There is a server for transmission and a server for reception in the server and (those which have combined both general), typical ones of the server for reception are the POP3 server.

POP before SMTP

Reading: The pop before the s m tea tweet
Field:
Internet > mail > POP before SMTP
Network technology > TCP/IP > POP before SMTP
Security > network > mail > POP before SMTP

The case where transmission of E-mail is done one of user identification methods. Before the transmitting the system which gives the use permission of the SMTP server by making the POP3 server access who is appointed beforehand. “PbS” there are also times when it is briefly described rarely.

Originally because there is no user identification function in SMTP, the fact that it makes the stool of un-discriminating announcement mail transmission is prevented, it was necessary to refuse the access from external network altogether.

But, also the proper user who is connected from external network becomes not be able to access with this system and because it is inconvenient, just fixed time makes the IP address of the user transmission reception possible by first doing the reception of the mail with POP which has certification mechanism.

popd

Reading: Pop D
Full spelling: Post Office Protocol Daemon
Field:
OS > UNIX > popd
Internet > mail > popd

Program-id of the POP server who is permanently stationed in the UNIX system. The mail of the user address which is retained inside the server in compliance with the user requirements is transmitted

POSIX

Reading: [pojitsukusu]
Full spelling: Portable Operating System Interface for UNIX
Field:
OS > UNIX > POSIX

It was decided by IEEE, set of specification of minimum which UNIX based OS should have. Of each company, OS the respective individual expansion and modification of specification were administered UNIX interchangeably because compatibility is lost, were defined in order to guarantee the compatibility of the minimum between each OS. Method (system interface) and the like in order to call the function which the application software offers OS has been defined. Even with the American National Standards Institute (ANSI) and International Organization for Standardization (ISO) it is adopted as standard, it has become the essential condition which the UNIX system which is paid to the American Government agency should protect.

POST

Reading: Post
Full spelling: POWER ON Self Test
Field:
Personal computer > POST

The test of each equipment which is executed at the time of power source throwing of the computer automatically. You inspect whether there is no abnormality in hardware such as memory and disk and keyboard.