CCNA（200-301）题库V
1.0(2020.11.23)
Exam A
QUESTION 1
A network engineer must create a diagram of a multivendor network.which command must be configured on the Cisco devices so that the topology of the network can be mapped?
网络工程师必须创建一个多供应商网络图。必须在Cisco设备上配置哪个命令才能映射网络拓扑？
A. Device(config)#lldp run
B. Device(config)#cdp run
C. Device(config)# cdp enable
D. Device(config)# flow-sampler-map topology
Correct Answer: A Section:
choice E xplanation
Explanation/Reference:
QUESTION 2
Which feature on the Cisco Wireless LAN Controller when enabled restricts management access from specific networks?
启用时，思科无线局域网控制器上的哪个功能会限制来自特定网络的管理访问？
A. CPU ACL
B. TACACS
C. Flex ACL
D. RADIUS
Correct Answer: A Section:
choice E xplanation
Explanation/Reference:
Reference:
www.cisco/c/en/us/support/docs/wireless-mobility/wlan-security/71978-acl-wlc.html
QUESTION 3
When a site-to-site VPN is used, which protocol is responsible for the transport of user data?
使用站点到站点VPN时，哪个协议负责用户数据的传输？
A. IKEv2
B. IKEv1
C. IPsec
D. MD5
Correct Answer: C Section:
choice E xplanation
Explanation/Reference:
QUESTION 4
How do TCP and UDP differ in the way that they establish a connection between two endpoints？
TCP和UDP在两个端点之间建立连接的方式有何不同？
A. TCP use the three-way handshake,and UDP dose no guarantee message delivery
A. TCP使用三向握手，而UDP不保证消息传递
B. TCP use synchronization packets,and UDP uses acknowledgement packets
C. UDP provides reliable message transfer,and TCP is a connectionless protocol.
D. UDP use SYN,SYN ACK,and FIN bits in the frame header while TCP uses SYN,SYN ACK,and ACK bis.
Correct Answer: A Section:
choice E xplanation
Explanation/Reference:
QUESTION 5
What are two reasons that cause late collisions to increment on an Ethernet interface?(choose two) 导致延迟冲突在以太网接口上增加的两个原因是什么？（选择两个）
A. when the sending device waits 15 seconds before sending the frame again
B. when the cable length limits are exceeded
超出电缆长度限制时
controller翻译中文C. when one side of the connection is configured for half-duplex
D. when Carner Sense Multiple Access/Collision Detection is used
使用Carner Sense多路访问/冲突检测时
E. when a collision occurs after the 32nd byte of a frame has been transmitted
Correct Answer: BD
Section: choice
Explanation
Explanation/Reference:
QUESTION 6
A Cisco IP phone receive untagged data traffic from an attached PC. Which action is taken by the phone? 思科IP电话从连接的PC接收未标记的数据流量。电话采取什么行动？
A. It allows the traffic to pass through unchanged
它允许流量不变地通过
B. It drops the traffic
C. It tags the traffic with the default VLAN
D. It tags the traffic with the native VLAN
Correct Answer: A Section:
choice E xplanation
Explanation/Reference:
QUESTION 7
Refer to the exhibit. The show ip ospf interface command has been executed on R1 How is OSPF configured? 请参见图示。在R1上已执行show ip ospf interface命令。如何配置OSPF？
A. The interface is not participating in OSPF
B. A point-to-point network type is configured
C. The default Hello and Dead timers are in use
使用默认的Hello和Dead计时器
D. There are six OSPF neighbors on this interface
Correct Answer: C Section:
choice E xplanation
Explanation/Reference:
QUESTION 8

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