思科认证：CCNA认证考前精选模拟试题1
思科知识的学习在一定基础上还是有些难度，为了帮助考生们复习好《思科认证：CCNA认证学科》，我们考吧网整理了思科认证模拟试题，本次汇编的模拟试题希望对你的考试有所帮助，预祝你考试顺利。
1. The classic Spanning Tree Protocol (802.1D 1998) uses which sequence of variables to determine the best received BPDU?
基本的生成树协议(802.1D)，使用哪些参数来确定最佳的BPDU的包
A. 1) lowest root bridge id, 2) lowest sender bridge id, 3) lowest port id, 4) lowest root path cost
B. 1) lowest root path cost, 2) lowest root bridge id, 3) lowest sender bridge id, 4) lowest sender port id
C. 1) lowest root bridge id, 2) lowest sender bridge id, 3) lowest root path cost 4) lowest sender port id
D. 1) lowest root bridge id, 2) lowest root path cost, 3) lowest sender bridge id, 4) lowest sender port id Answer: D
2. Which three port states are used by RSTP 802.1w? (Choose three.)
哪三个状态出现在RSTP 802.1W中
A. Listening
B. Learning
C. Forwarding
D. Blocking
E. Discarding
F. Disabled
Answer: BCE
3. Which OSPF LSA type does an ASBR use to originate a default route into an area?在OSPF协议中ASBR在一个区域从外部发送默认路由使用哪种LAS
A. LSA 1
B. LSA 3
C. LSA 4
D. LSA 5
E. LSA 7
Answer: D
4. What is the purpose of the STP PortFast BPDU guard feature?根状态发生了改变什么是生成树开启PortFast BPDU保护功能的目的
A. enforce the placement of the root bridge in the network
B. ensure that a port is transitioned to a forwarding state quickly if a BPDU is received
C. enforce the borders of an STP domain
D. ensure that any BPDUs received are forwarded into the STP domain
Answer: C
5. When STP UplinkFast is enabled on a switch utilizing the default bridge priority, what will the new bridge priority be changed to?配置了生成树域的边界当STP的uplink Fast端口上使用了一个默认优先级的交换机，这个交换机的优先级将变成什么?
A. 8192
B. 16384
C. 49152
D. 65535
Answer: C
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