BASIC
Version 1.0, 12/2014. Copyright 2012 Hitron Technologies
55
Version 1.0, 12/2014. Copyright 2014 Hitron Technologies
55
Hitron CGNM-2250 User’s Guide
The LAN is a separate network from the Wide Area Network (WAN). In the case of
the CGNM-2250, the WAN refers to all computers and other devices available on the
cable connection.
By default, computers on the WAN cannot identify individual computers on the LAN;
they can see only the CGNM-2250. The CGNM-2250 handles routing to and from
individual computers on the LAN.
4.1.2
LAN IP Addresses and Subnets
IP addresses on the LAN are controlled either by the CGNM-2250’s built-in DHCP
server (see
), or by you (when you manually
assign IP addresses to your computers).
For more information about IP addresses and subnets in general, see
.
4.1.3
DNS and Domain Suffix
A domain is a location on a network, for instance
example.com
. On the Internet,
domain names are mapped to the IP addresses to which they should refer by the
Domain Name System. This allows you to enter “www.example.com” into your
browser and reach the correct place on the Internet even if the IP address of the
website’s server has changed.
Similarly, the CGNM-2250 allows you to define a
Domain Suffix
to the LAN. When
you enter the domain suffix into your browser, you can reach the CGNM-2250 no
matter what IP address it has on the LAN.
4.1.4
Debugging (Ping and Traceroute)
The CGNM-2250 provides a couple of tools to allow you to perform network
diagnostics on the LAN:
Ping: this tool allows you to enter an IP address and see if a computer (or other
network device) responds with that address on the network. The name comes
from the pulse that submarine SONAR emits when scanning for underwater
objects, since the process is rather similar. You can use this tool to see if an IP
address is in use, or to discover if a device (whose IP address you know) is
working properly.
