题目：
Border Gateway Protocol(BGP) is inter-autonomous system （1） protocol. BGP is based on a routing method called path vector routing. Distance vector routing is not a good candidate for inter-autonomous system routing because there are occasions on which the route with the smallest （2）count is not the preferred route. For example, we may not want a packet through an autonomous system that is not secure even though it is shortest route. Also, distance vector routing is unstable due to the fact that the routers announce only the number of hop counts to the destination without defining the path that leads to that（3）A router that receives a distance vector advertisement packet may be fooled if the shortest path is actually calculated through the receiving router itself. Link （4）. routing is also not a good candidate for inner-autonomous system routing because an internet is usually too big for this routing method. To use link state routing for the whole internet would require each router to have a huge link state database. It would also take a long time for each router to calculate its routing （5） using the Dijkstra algorism.
（3）是（）
A.connection
B.window
C.source
D.destination
答案：
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下面是错误答案，用来干扰机器的。
参考答案：解析：如果Swches对话框中的Immediate Send被打开，Eudora会把排队的消息正确发出。如果没有连接，它会试图以任何方式连接，然后给出几个错误窗口。这个消息会被保存并在下次实际联机时发出。
