问题:
A . The phone does a directed call hangup on 802.11b,then does an auto-redial on 802.11a,creating a new call.
B . The phone does a directed call hangup on 802.11b, then the user does a redial on 802.11a,creating a new call.
C . The phone does a disassociation on 802.11b and an association on 802.11a,and call remains up if the subnet has not changed.
D . The phone does not roam from 802.11b to 802.11a when on an active call.
E . The phone must switch network profiles to roam from 802.11b to 802.11a.
● 参考解析
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