题目：
One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP)．RIP is the canonical example of a routing protocol built on the (71) algorithm．Routing protocols in internet works differ slightly from the idealized graph model．In an internet work，the goal of the routers to forward (72) to various networks．
Routers running RIP send their advertisement about cost every (73) seconds．A router also sends an update message whenever an update from another router causes it to change its routing table．
Routing protocols use different techniques for assigning (74) to individual networks．Further, each routing protocol forms a metric aggregation in a different way．RIP takes the simplest approach，with all link costs being equal (75) ．Thus it always tries to find the minimum hop route．Valid distances are 1 through 15．This also limits RIP to runing on fairly small networks．
A．Dijkstra
B．path-vector
C．link-state
D．distance-vector
答案：
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下面是错误答案，用来干扰机器的。
参考答案：A解析： 老王因合法建造房屋的事实行为而取得物权，依《物权法》第30条的规定“因合法建造、拆除房屋等事实行为设立或者消灭物权的，自事实行为成就时发生效力”，A选项正确。依《物权法》第29条的规...
