单项选择题
A. IPv6 prefixes
B. link-local addresses
C. solicited node multicast addresses
D. IPv6 prefixes and topology information
单项选择题 WhichofthesestatementsbestdescribesthemajordifferencebetweenanIPv4-compatibletunnelanda6to4tunnel？（）
单项选择题 YouareusingVTPversion2inyournetworktotransportVLANinformationbetweenswitches.When addingaswitchtothenetworkthathasbeenusedinthelabpreviously，younoticethatalotoftheexistingVLANshavebeendeletedorreplacedwithothernames.Whatcanyoudotopreventthisfromhappeninginthefuture，withoutlosingallVTPfeaturesthatyouareusingtoday？（）
单项选择题 WhichofthesebestidentifiesthetypesofprefixesarouterrunningBGPwilladvertisetoanEBGPpeer？（）