Sierra Wireless AirLink MP Guía de usuario descargar pdf (Pagina 82)

ALEOS User Guide

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• Top Level Domain (TLD): The TLD is the ending suffix for a domain name

(.com, .net, .org, etc.)

• Country Code Top Level Domain (ccTLD): This suffix is often used after the

TLD for most countries except the US (.ca, .uk, .au, etc.)

• Domain name: This is the name registered with ICANN (Internet Corporation

for Assigned Names and Numbers) or the registry for a the country of the

ccTLD (i.e. if a domain is part of the .ca TLD, it would be registered with the

Canadian domain registry). It is necessary to have a name registered before

it can be used.

• Sub-domain or server name: A domain name can have many sub-domain

or server names associated with it. Sub-domains need to be registered with

the domain, but do not need to be registered with ICANN or any other

registry. It is the responsibility of a domain to keep track of its own subs.

car54.mydomain.com

• .com is the TLD

• mydomain is the domain (usually noted as mydomain.com since the domain

is specific to the TLD)

• car54 is the subdomain or server name associated with the device, computer,

or device registered with mydomain.com

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

indicates 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 the 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 (such as 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 a IP change notification to IP Manager. IP Manager will

acknowledge the change and update the Dynamic DNS server. The new IP

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

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