多项选择题
7750SROSPF高可靠性是因为它具备以下功能（）
A.non-stopforwarding
B.gracefulrestart
C.non-stoprouting
D.Bidirectionalforwardingdetection
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多项选择题
A.non-stopforwarding
B.gracefulrestart
C.non-stoprouting
D.Bidirectionalforwardingdetection
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