Alesis ADAT-HD24 FirePort 1394, Справочное руководство, Страница: 88 / 102

chapter 9 • using Ethernet
ADAT HD24 Reference Manual
87
About the subnet mask
The subnet mask is a standard parameter used for
TCP/IP networking. On the HD24, the subnet
mask is used to determine how many computers
are on your local network. For instance, if your
HD24 IP address is set to A.B.C.D, and your subnet
mask is set to 255.255.255.0, then you are telling the
HD24 to look for any computer from A.B.C.0 to
A.B.C.255 on the local network. Similarly, if the
subnet mask is set to 255.255.0.0, then the HD24
will look for any computer from A.B.0.0 to
A.B.255.255.
About the gateway address
The gateway address is used to let the HD24 know
how to get to another network. By default, the
gateway address is set to 0.0.0.0, which means that
it is disabled. However, if the gateway address is
set to a non-zero value, then it can respond to
addresses outside its local network.
Gateway Hint:
The gateway address must be part of the local
network. For instance, if the HD24 IP address is
192.168.1.1, and the HD24 subnet mask is
255.255.255.0, then the gateway must be in the
range of 192.168.1.2 to 192.168.1.254.
Connecting the HD24 directly to
a cable or DSL modem
It is possible to connect the HD24 to the Internet
directly, but unless your ISP (Internet Service
Provider) assigns you a permanent, specific IP
address that your modem will always use, it may
be tricky.
In most cases when your computer connects to
the Internet, its IP address is given to it by the
host computer at the ISP. This is called a
dynamic address. When you log off, that address
may be reassigned to a different user.
The HD24 doesn't have the capability of having
its IP address set by the host. It must be set
manually in the Utility pages.
Check with your ISP to find out if they can assign
your modem a static address, which can be
entered manually to the ADAT HD24.
Otherwise, see page 89.