In which modes does selective packet discard（SPD）operate？（）

多项选择题WhichtwostatementsaboutVPLSaretrue？（）

A.There is a full mesh of pseudowires.
B.There is a partial mesh of pseudowires.
C.Only L2TPv3 can be used for pseudowire establishment.
D.There is split-horizon to avoid loops.

单项选择题IntheApacheWebServerconfiguration，thecommandKeepAliveONisusedto（）

A.Allow a CSS to probe the server
B.Allow a connection to be closed with a TCP RESET
C.Allow persistent connections
D.Allow the use of HTTP HEAD request

多项选择题WhichofthefollowingisreportedintheLMIregularstatuspolling？（）

A.Addition or Deletion of PVC
B.PVC status （active or inactive）
C.Link integrity
D.None of the other alternatives apply

单项选择题WhatistrueregardingCiscoNetworkRegistrarinCablenetworks？（）

A.It provides comprehensive Domain Name system
B.It provides DHCP administrative functionality
C.It provides TFTP server functionality.
D.All of the above are true

单项选择题WhatdoesUDLDstandfor？（）

A.UniDirectional Loop Detection
B.Unspecified Distribution Label Detection
C.Unified Distribution Label Direction
D.UniDirectional Link Detection