Sierra Wireless 2170042 Modem User Manual


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Rev A Dec.08 4
• .comistheTLD
• mydomainisthedomain(usuallynotedas
mydomain.comsincethedomainisspecifictotheTLD)
• car54isthesubdomainorservernameassociatedwiththe
device,computer,ormodemregisteredwith
mydomain.com
car54.mydomain.com.ca
Thiswouldbethesameasabove,butwiththeadditionofthe
countrycode.Inthisexample,thecountrycode(.ca)isfor
Canada.
AURL(UniversalResourceLocator)isdifferentfroma
domainnameinthatitalsoindicatesinformationontheproto
‐
colusedbyawebbrowsertocontactthataddress,suchas
http://www.sierrawireless.com.www.sierrawireless.comisa
fullyqualifieddomainname,butthehttp://,theprotocoliden
‐
tifier,iswhatmakesthewholethingaURL.
Dynamic Names
WhenanIPaddressisnotexpectedtochange,theDNSserver
canindicatetoallqueriesthattheaddresscanbecachedand
notlookedupforalongperiodoftime.DynamicDNS
servers,conversely,haveashortcachingperiodforthe
domaininformationtopreventotherInternetsites
orqueries
fromusingtheoldinformation.SincetheIPaddressofa
modemwithadynamicaccountcanchangefrequently,ifthe
oldinformationwasused(suchaswithaDNSserverwhich
indicatestheaddresscanbecachedforalongperiodoftime)
whentheIPaddress
changed,thedomainwouldnolonger
pointtothenewandcorrectIPaddressofthemodem.
IfyourmodemisconfiguredforDynamicIP,whenitfirst
connectstotheInternet,itsendsaIPchangenotificationtoIP
Manager.IPMangerwillacknowledgethechangeandupdate
theDynamicDNSserver.ThenewIPaddresswillthenbethe
addressforyourmodem’sconfiguredname.
Onceyourmodem’sIPaddresshasbeenupdatedinIP
Manager,itcanbecontactedvianame.IftheIPaddressis
needed,youcan usethedomainnametodeterminetheIP
address.
Note: The fully qualified domain name of your modem will be a
subdomain of the domain used by the IP Manager server.
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