19216811.liveDG-BR4000N/E User Manual
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external attacker only has access to equipment in the DMZ, rather than any other part of the
network.
Ethernet:
A standard for computer networks. Ethernet networks are connected by special
cables and hubs, and move data around at up to 10/100 million bits per second (Mbps).
Idle Timeout:
Idle Timeout is designed so that after there is no traffic on the Internet for a
pre-configured amount of time, the connection will automatically get disconnected.
IP Address and Network (Subnet) Mask:
IP stands for Internet Protocol. An IP address
consists of a series of four numbers separated by periods, which identifies a single, unique
Internet computer host in an IP network. Example: 192.168.2.1. It consists of 2 portions: the
IP network address, and the host identifier.
The IP address is a 32-bit binary pattern, which can be represented as four cascaded decimal
numbers separated by “.”: aaa.aaa.aaa.aaa, where each “aaa” can be anything from 000 to 255,
or
as
four
cascaded
binary
numbers
separated
by
“.”:
bbbbbbbb.bbbbbbbb.bbbbbbbb.bbbbbbbb, where each “b” can be either 0 or 1.
A network mask is also a 32-bit binary pattern, and consists of consecutive leading
1’s followed by consecutive trailing 0’s, such as
11111111.11111111.11111111.00000000. Therefore sometimes a network mask can also be
described simply as “x” number of leading 1’s.