AirLive
POE100CAMv2
User’s
Manual
136
Router -
A device that determines the next network point to which a packet should be forwarded on its way to its
final destination. A router creates and/or maintains a special routing table that stores information on how
best to reach certain destinations. A router is sometimes included as part of a network switch. See also
switch
.
Server -
In general, a server is a computer program that provides services to other computer programs in the
same or other computers. A computer running a server program is also frequently referred to as a server.
In practice, the server may contain any number of server and client programs. A web server is the
computer program that supplies the requested HTML pages or files to the client (browser).
Sharpness -
This is the control of fine detail within a picture. This feature was originally introduced into color TV sets
that used notch filter decoders. This filter took away all high frequency detail in the black and white
region of the picture. The sharpness control attempted to put some of that detail back in the picture.
Sharpness controls are mostly superfluous in today's high-end TVs. The only logical requirement for it
nowadays is on a VHS machine.
Simplex -
In simplex operation, a network cable or communications channel can only send information in one
direction.
SMTP (Simple Mail Transfer Protocol) -
SMTP is used for sending and receiving e-mail. However, as it is "simple," it is limited in its ability to
queue messages at the receiving end, and is usually used with one of two other protocols, POP3 or
IMAP. These other protocols allow the user to save messages in a server mailbox and download them
periodically from the server.
SMTP authentication is an extension of SMTP, whereby the client is required to log into the mail server
before or during the sending of email. It can be used to allow legitimate users to send email while
denying the service to unauthorized users, such as spammers.
SNMP (Simple Network Management Protocol) -
SNMP forms part of the Internet Protocol suite, as defined by the Internet Engineering Task Force. The
protocol can support monitoring of network-attached devices for any conditions that warrant
administrative attention.
Sockets -
Sockets are a method for communication between a client program and a server program over a
network. A socket is defined as "the endpoint in a connection." Sockets are created and used with a set
of programming requests or "function calls" sometimes called the sockets application programming
interface (API).
