2012年思科认证（CCNA）考试练习题精选13
61. What are the two basic mechanisms that make up a routing protocol (构成路由选择协议的两个基本机制是什么.？
A. Route selection
B. Flooding
C. Autonomous Systems
D. Data Tr a n s m i s s i o n
62. What is a routing table used for (路由选择表的用途是什么.？
A. It is the physical support for the router to sit on
B. It contains a list of all the timers used to prevent routing loops
C. It is used to select the best route
D. It manages the periodic update algorithm
63. What types of information can be found in different types of routing protocol routing tables (在不同类型的路由选择协议路由表中可以发现何种类型的信息.？(select 3.
A. The destination network associated with the next hop
B. The destination network associated with the cost metric
C. The destination network associated with the subnet mask
D. The destination network associated with the next path or interface to use
64. What is a routing update used for (路由选择更新的用途是什么.？
A. Routing updates notify neighboring routers with a 呼叫
B. Routing updates redistribute routes learned from other routing protocols
C. Routing updates maintain the routing table
D. Routing updates increase the network addresses available by changing the subnet masks
65. When a node on one network sends a packet to a node on another segment that is three
hops away, what addresses are included in the initial addressing of that packet (select 2. (当网络上的节点向另一个跳3个跳上的节点发送信息表时，在那个信息表的初始地址中包含了什么地址.？
A. The network address of the router
B. The MAC layer address of the router
C. The network address of the destination node
D. The MAC layer address of the destination node