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Router
A device that connects two networks together. Routers monitor, direct and filter
information that passes between these networks.
RS-232
RS-232 is an EIA standard which is the most common way of linking data devices
together.
Server
A computer, or a software package, that provides a specific kind of service to client
software running on other computers.
SSL (Secured Socket Layer)
Technology that allows you to send information that only the server can read. SSL
allows servers and browsers to encrypt data as they communicate with each other.
This makes it very difficult for third parties to understand the communications.
Subnet Mask
The subnet mask specifies the network number portion of an IP address. Your device
will compute the subnet mask automatically based on the IP Address that you entered.
You do not need to change the computer subnet mask unless you are instructed to do
so.
Switch
A layer-2 network device that selects a path or circuit to send a data packet through.
TCP (Transmission Control Protocol)
TCP is a connection-oriented transport service that ensures the reliability of message
delivery. It verifies that messages and data were received.
Telnet
Telnet is the login and terminal emulation protocol common on the Internet and in
UNIX environments. It operates over TCP/IP networks. Its primary function is to allow
users to log into remote host systems.
Terminal
A device that allows you to send commands to a computer somewhere else. At a
minimum, this usually means a keyboard, display screen and some simple circuitry.
TFTP (Trivial File Transfer Protocol)
TFTP is an Internet file transfer protocol similar to FTP (File Transfer Protocol), but it is
scaled back in functionality so that it requires fewer resources to run. TFTP uses the
UDP (User Datagram Protocol) rather than TCP (Transmission Control Protocol).
Transparent Firewall
A transparent firewall, also known as a bridge firewall, is a device that can act as a
bridge and also filter/inspect packets. You do not have to change other network
settings when you add a transparent firewall to the network.
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