Which statement is true of a source that wants to transmit multicast traffic to group 239.1.1.1？（）
A . Before sending traffic, it must first join multicast group 239.1.1.1 by sending an IGMPv2 membership report to the default router on the local subnet.
B . It must send an IGMPv2 Request to Send packet and then wait for an IGMPv2 Clear to Send packet from the IGMPv2 querier router on the local subnet
C . It may begin transmitting multicast traffic to the group only when there is no other host transmitting to the group on the local subnet.
D . It may transmit multicast traffic to the group at any time.&e
相似题目
-
Which of the statements is NOT true?
-
Which of the following statements is true？
A．The divorce rate in Britain would reach 50 percent.
B．Some 34 percent of women have cohabited.
C．Over 50 percent of women cohabit before marriage.
D．13 percent of births were outside formal marriage in Britain.
-
Which of the statements is true？
A．The stockholder can sell his stock to anywhere at anytime.
B．There were no stock exchange in England in the 1700's.
C．The price of stock is not stable.
D．The stockbrokers do the transaction without charging for the stockholders.
-
Which of the following statements is True？
A．Children are always clear about what they are learning in the museums.
B．Parents are usually more interested in the museums than their children.
C．Playing games is a means of interactive learning offered by the museums.
D．Many demonstrations in the museums are designed by the kids.
