<Quidway>display current-configuration
#
multicast routing- enble
# interface Ethernet6/1/0
ip address 10.1.1.1 255.255.255.0
igmp timer query 40
#
igmp
#
return
The above information is a partial multicast configuration intercepted from a router. After the igmp enable command is configured on interface Ethernet6/1/0, the igmp transmission interval is () seconds after the querier is started.
A . 60
B . 40
C . 15
D . 10
Answer: B