Crestron
CNX Enhanced Ethernet Expansion Card
IP MASK
An IP mask is a pattern of bits in IP address format (e.g. 255.255.255.0) which, when
"and"ed with your IP address, produces a
network address
. If an outgoing packet's
network address has the same network address as the source of the packet, it is sent
on the local network wire, to be received by a device on that local network.
Otherwise, it is sent to the gateway to be routed to a device existing on another
network. The IP mask for any device should be assigned by whoever manages the
local network. An IP mask is also referred to as a Subnet Mask.
IP TABLE
An IP table lists IP IDs and their corresponding IP addresses. This table is
maintained inside each CNX control system, though it may be generated by a SIMPL
Windows program, or edited manually using the Viewport utility.
NETWORK ADDRESS
A network address is a pattern of bits in IP address format that is shared by all
network devices on a given local network. For example, network address
192.168.2.0 describes the local network where all devices have an IP address of
192.168.2.x, where x is any value from 1 to 254.
ROUTER
Router is a communications device which routes data between networks.
SUBNET MASK
See IP Mask above.
TCP/IP
TCP/IP stands for Transmission Control Protocol/Internet Protocol. It is quite simply
a standard set of protocols that govern the basic workings of the Internet that was
implemented in 1982.
The TCP part is all about ensuring that data is transmitted correctly between two
computers. If any errors occur these are detected and the data is retransmitted. The
data transmitted is split up into small portions called data packets. The IP part of
TCP/IP is how these data packets are moved from one point to another. Each
computer on the Internet has a unique IP address and the data packets are moved
from the source to the destination through many different computers which is
controlled via TCP/IP. This protocol is used on the Internet and also by computers
which are part of a LAN.
Operations & Installation Guide – DOC. 8153A
Glossary of Terms
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