Given a bridge link 6 miles （9.7 km） long，which parameter on the Root Radio Interface page must be configured in order for IP traffic to pass？（）..

第1题

[单选题] For&#8194;a&#8194;given&#8194;Ethernet&#8194;network，&#8194;the&#8194;failure&#8194;cycle&#8194;is&#8194;set&#8194;to&#8194;5&#8194;seconds&#8194;and&#8194;the&#8194;heartbeat&#8194;rate&#8194;is&#8194;set&#8194;to&#8194;2&#8194;seconds.Given&#8194;these&#8194;values，&#8194;what&#8194;is&#8194;the&#8194;failure&#8194;detection&#8194;time&#8194;for&#8194;the&#8194;network&#8194;（in&#8194;seconds）？（）

A、5 B、10 C、12 D、20

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第2题

[单选题] How&#8194;many&#8194;strict-high&#8194;priority&#8194;forwarding&#8194;classes&#8194;can&#8194;be&#8194;applied&#8194;to&#8194;a&#8194;given&#8194;interface？（）

A、1 B、2 C、3 D、4

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第3题

[单选题] What&#8194;is&#8194;the&#8194;Cisco&#8194;IOS&#8194;default&#8194;behavior&#8194;for&#8194;switching&#8194;from&#8194;the&#8194;shared&#8194;tree&#8194;to&#8194;the&#8194;shortest&#8194;path&#8194;tree&#8194;in&#8194;PIM-SM&#8194;operations？（）

A、immediately after receiving the first packet on the shared tree for a given （S，G） B、after receiving over 1 kb/s traffic onthe shared tree for a given （S，G） C、10 seconds after receiving the first packet on the shared tree for a given （S，G） D、30 seconds after receiving the first packet on the shared tree for a given （S，G） E、after receiving over 10 kb/s traffic onthe shared tree for a given （S，G）