What is the protocol of following described： there are 4 priority queues：high，medium，normal.low the high and medium queue have precedence over the default queue the classifcation is configuration via the command ‘priority-list’ the default queue is the normal queue.

多项选择题 YourcompanyisresearchinganewapplicationthatrunsoverIPv6，butpartofitmuststillhaveIPv4support.YourcompanyusesatraditionalIPv4network.YourplanisnottorunIPv6overthewholenetwork，buttosegmentpartsofthenetworkoreventooperatesimultaneouslywithIPv6andIPv4.YoumustmakeabriefpresentationaboutIPv6technologytotheboardoftechnicaldirectors.Whichthreeoftheseitemscouldbepartofyourpresentation？（）

问答题 WhatarethefourtypeofaddressinNAT？

单项选择题 Anexpandingcompanyisdeployingleasedlinesbetweenitsmainsiteandtworemotesites.Thebandwidthoftheleasedlinesis128kb/seach，terminatedondifferentserialinterfacesonthemainrouter.TheselinksareusedforcombinedVOIPanddatatraffic.ThenetworkadministratorhasimplementedaVOIPsolutiontoreducecosts，andhasthereforereservedsufficientbandwidthinalowlatencyqueueoneachinterfacefortheVOIPtraffic.Usersnowcomplainaboutbadvoicequalityalthoughnodropsareobservedinthelowlatencyqueue.Whatactionwilllikelyfixthisproblem？（）

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