A.广播
B.单播
C.组播
D.点播

A.igmp off
B.igmp proxy
C.igmp on
D.igmp Snooping

A.10
B.6
C.8
D.5

A.BTV
B.VOD
C.NPVR
D.Game

A.40Mbit/s
B.200Mbit/s
C.100Mbit/s
D.50Mbit/s

A.MA5680T（config）#display igmp user all
B.MA5680T（config-mvlan300）#display igmp user all
C.MA5680T（config－if）#display igmp user al
D.MA5680T（config－btv）#display igmp user all

A.MA5680T（config）#display vlan 3000
B.MA5680T（config-3000）#display vlan
C.MA5680T#display vlan 3000
D.MA5680T（config-if）#display vlan 3000

A.224.0.0.0~224.0.0.255
B.224.0.1.0~238.255.255.255
C.224.0.0.0–239.255.255.255
D.239.0.0.0~239.255.255.255

A.MGCP
B.SIP
C.sigtran
D.H .248

A.MA5680T（config）#arp proxy enable
B.MA5680T（config-if）#arp proxy enable
C.MA5680T（config-if）#arp proxy 172enable
D.MA5680T（config-if-vlanif172）#arp proxy enable

A.401unauthorized
B.200ok
C.bye
D.register