Velocity Edge GX440 User's Guide download pdf (Page 156)

ALEOS 4.3.4 Software Configuration User Guide

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car54.mydomain.com.ca

This would be the same as above, but with the addition of the country code. In

this example, the country code (.ca) is for Canada.

Tip: A URL (Universal Resource Locator) is different from a domain name in that it also

provides information on the protocol used by a web browser to contact that address such

http://www.sierrawireless.com. www.sierrawireless.com is a fully qualified

domain name, but http://, the protocol identifier, is what makes the whole thing a URL.

Dynamic Names

When an IP address is not expected to change, the DNS server can indicate to all

queries that the address can be cached and not looked up for a long period of

time. Dynamic DNS servers, conversely, have a short caching period for the

domain information to prevent other Internet sites or queries from using the old

information. Since the IP address of a device with a dynamic account can change

frequently, if the old information was used (e.g., with a DNS server which

indicates the address can be cached for a long period of time) when the IP

address changed, the domain would no longer point to the new and correct IP

address of the device.

If your AirLink device is configured for Dynamic IP when it first connects to the

Internet, it sends an IP change notification to the IP Manager. The IP Manager

acknowledges the change and updates the Dynamic DNS server. The new IP

address will then be the address for your device’s configured name.

When your device IP address has been updated in IP Manager, it can be

contacted by name. If the IP address is needed, use the domain name to

determine the IP address.

Note: The fully qualified domain name of your AirLink device will be a subdomain of the

domain used by the IP Manager server.

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Velocity Edge GX440 User's Guide Page 156