以下Windows命令中，可以用于验证端系统地址的是(56)；可以用于识别分组传送路径的是(57)；如果要终止一个ping会话，正确的操作是(58)。以下应用中，对网络带宽性能影响最大的应用是(59)。OSPF和RIP都是Internet中的路由协议，与RIP相比，OSPF有许多优点，但(60)不是OSPF的优点。

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In low-speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high-speed networks, this approach often works poorly, because in the(71)between sending the notification and notification arriving at the source, thousands of additional(72)may arrive. In ATM network, a major tool for preventing(73)is(74)control. When a host wants a new virtual(75),it must describe the traffic to be offered and the service expected.

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To a router, a flow is a(66)of packets that share the same Characterstics, such as traveling the same(67),using the same(68),having the same kind of security, and so on. A router that supports the handling of flow labels has a(69)table. The table has an entry for each active flow label; each entry defines the(70)required by the corresponding flow label.

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