WhichtwostatementsaboutVPLSaretrue？（）
A. Thereisafullmeshofpseudowires.
B. Thereisapartialmeshofpseudowires.
C. OnlyL2TPv3canbeusedforpseudowireestablishment.
D. Thereissplit-horizontoavoidloops.
查看答案
Whatarethreefeaturesofvoicetrafficonanetwork？（）
A. bursty
B. constant
C. bandwidthintensive
D. smallpacketsizes
E. time-sensitive
F. retransmittable
WhatisTCI？（）
A. TagCallingInterface
B. TagControlIdentifier
C. ToSClassInterface
D. TagControlInformation
Which IPsec security protocol should be used when confidentiality is required？（）
AH
B. MD5
C. PSK
D. ESP
WhatdoesUDLDstandfor？（）
A. UniDirectionalLoopDetection
B. UnspecifiedDistributionLabelDetection
C. UnifiedDistributionLabelDirection
D. UniDirectionalLinkDetection
微信支付 
支付宝支付