Westermo RM-80 - Manual (Page 55)

55 6193-4201
SSL Commonly used encryption scheme used by many online retail and
banking sites to protect the financial integrity of transactions. When
an SSL session begins, the server sends its public key to the browser.
The browser then sends a randomly generated secret key back to
the server in order to have a secret key exchange for that session
Subnetwork or
Subnet Found in larger networks, these smaller networks are used to
simplify addressing between numerous computers. Subnets connect
to the central network through a router, hub or gateway. Each
individual wireless LAN will probably use the same subnet for all the
local computers it talks to.
Switch A type of hub that efficiently controls the way multiple devices use
the same network so that each can operate at optimal performance.
A switch acts as a networks traffic cop: rather than transmitting all
the packets it receives to all ports as a hub does, a switch transmits
packets to only the receiving port.
TCP A protocol used along with the Internet Protocol (IP) to send data in
the form of individual units (called packets) between computers over
the Internet. While IP takes care of handling the actual delivery of the
data, TCP takes care of keeping track of the packets that a message
is divided into for efficient routing through the Internet. For example,
when a web page is downloaded from a web server, the TCP
program layer in that server divides the file into packets, numbers
the packets, and then forwards them individually to the IP program
layer. Although each packet has the same destination IP address, it
may get routed differently through the network. At the other end,
TCP reassembles the individual packets and waits until they have all
arrived to forward them as a single file.
TCP/IP The underlying technology behind the Internet and communications
between computers in a network. The first part, TCP, is the transport
part, which matches the size of the messages on either end and
guarantees that the correct message has been received. The IP part
is the user’s computer address on a network. Every computer in a
TCP/IP network has its own IP address that is either dynamically
assigned at startup or permanently assigned. All TCP/IP messages
contain the address of the destination network as well as the address
of the destination station. This enables TCP/IP messages to be
transmitted to multiple networks (subnets) within an organization or
worldwide.
VoIP Voice transmission using Internet Protocol to create digital packets
distributed over the Internet. VoIP can be less expensive than voice
transmission using standard analog packets over POTS (Plain Old
Telephone Service).