YouareanetworkadministratorforLitware，Inc.Thecompany’smainofficeislocatedinLima，andbranchofficesarelocatedinfiveothercities.ThenetworkconsistsofasingleDNSdomainnamedlitwareinc.com.Thenetworkconfigurationisshownintheexhibit.（ClicktheExhibitbutton.）

<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/047d17bb6e10a6f1cb1952efc83707eb.jpg' /> AllnetworkserversrunWindowsServer2003.AllclientcomputerIPaddressesareassignedbyusingaDHCPserverthatislocatedineachoffice.Clientcomputersarereimagedoftenandareassignednewnameseachtimetheyarereimaged.AllclientcomputersareconfiguredtoreferencetheirlocalDNSserverasthepreferredDNSserverandtoreferencethecentralDNSserverasthealternateDNSserver.Aprimaryzoneforlitwareinc.comisconfiguredonaserverintheLimaoffice.Secondaryzonesareconfiguredonaserverineachbranchoffice.Theretryinterval，therefreshinterval，theexpirationinterval，andthedefaultminimumTimetoLive（TTL）intervalareconfiguredwiththedefaultsettings.Networkbandwidthutilizationaverages40percent.ThenetworkconnectionbetweentheLimaofficeandtheBogotaofficefailsanaverageoftwiceperday.UsersintheBogotaofficeoccasionallyreceiveincorrectresponsestoqueriesagainstthelocalDNSserverwhenthenetworkconnectionisinterruptedduringazonetransfer. Youneedtochangetheconfigurationofthestartofauthority（SOA）resourcerecordforlitwareinc.com.Inaddition，youneedtoreducethepossibilitythatuserscanquerylocalDNSzonesbeforesuccessfulzonetransfersoccur. Whatshouldyoudo？（）