稀释与接种法测定水中BOD5时，下列废水中应进行接种的是：（）
A. 有机物含量较多的废水
B. 较清洁的河水
C. 不含或含少量微生物的工业废水
D. 生活污水
查看答案
WhichstatementsdescribetheroutingprotocolOSPF？（）
A. ItsupportsVLSM.
B. Itisusedtoroutebetweenautonomoussystems.
C. Itconfinesnetworkinstabilitytooneareaofthenetwork.
D. Itincreasesroutingoverheadonthenetwork.
E. Itallowsextensivecontrolofroutingupdates.
F. ItissimplertoconfigurethanRIPv2.
ForwhattwopurposesdoestheEthernetprotocolusephysicaladdresses？（）
A. touniquelyidentifydevicesatLayer2
B. toallowcommunicationwithdevicesonadifferentnetwork
C. todifferentiateaLayer2framefromaLayer3packet
D. toestablishaprioritysystemtodeterminewhichdevicegetstotransmitfirst
E. toallowcommunicationbetweendifferentdevicesonthesamenetwork
F. toallowdetectionofaremotedevicewhenitsphysicaladdressisunknown
WhichthreeapproachescanbeusedwhilemigratingfromanIPV4addressingschemetoanIPV6scheme？（）
A. staticallymapIPV4addresstoIPV6addresses
B. configurationIPv4tunnelsbetweenIPV6islands
C. useDHCPv6tomapIPV4addressestoIPV6addresses
D. useproxyingandtranslationtotranslateIPV6packetsintoIPV4packets
E. configureIPV6directly
F. enabledual-stackrouting
Whatinformationdoesarouterrunningalink-stateprotocolusetobuildandmaintainitstopologicaldatabase？（）
A. hellopackets
B. SAPmessagessentbyotherrouters
C. LSAsfromotherrouters
D. beaconsreceivedonpoint-to-pointlinks
E. routingtablesreceivedfromotherlink-staterouters
F. TTLpacketsfromdesignatedrouters
微信支付 
支付宝支付