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AlterPath Manager E2000 Manual Glossary-7
connect to the Internet via PPP, you might want to set your
machine's MTU to 576 too. Most Ethernet networks, on the
other hand, have an MTU of 1500.
Network Mask A 32-bit number used to group IP addresses together or to
indicate the range of IP addresses on a single IP network/
subnet/supernet. There is a group of addresses assigned to
each network segment. For example, the mask 255.255.255.0
groups together 254 IP addresses. If we have, as another
example, a sub-network 192.168.16.64 with mask
255.255.255.224, the addresses we may assign to computers
on the sub-network are 192.168.16.65 to 192.168.16.94, with
a broadcast address of 192.168.16.95.
A number used by software to separate the local subnet
address from the rest of a given Internet protocol address
Network masks divide IP addresses into two parts (network
address and address of a particular host within the network).
Mask have the same form as IP addresses (i.e.
255.255.255.0), however, its value is needed to be
understood as a 32-bit number with certain number of ones
on the left end and zeros as the rest. The mask cannot have an
arbitrary value. The primary function of a subnet mask is to
define the number of IP hosts that participate in an IP subnet.
Computers in the same IP subnet should not require a router
for network communication.
NTP Network Time Protocol. A standard for synchronizing your
system clock with the ``true time'', defined as the average of
many high-accuracy clocks around the world.
Parity In serial communications, the parity bit is used in a simple
error detection algorithm. As a stream of data bits is formed,
an extra bit, called the parity bit, is added. This bit is set on
(1) or off (0), depending on the serial communications
parameters set in the UART chip.