CCNA系列认证多项选择题每日一练(2020.04.27)

多项选择题
XYZ LTD wants to connect Cisco IP Phones and Cisco Aironet Access Points to the network. The customer also wants to use the PoE features included in the Cisco Catalyst Express 500 Series Switches.Which two models can provide this features?（）
A. WS-CE500G-12TC
B. WS-CE500-24PC
C. WS-CE500-24TT
D. WS-CE500-24LC
多项选择题
Refer to the exhibit.Which three statements correctly describe Network Device A？（）
A.With a network wide mask of 255.255.255.128， each interface does not require an IP address.
B.With a network wide mask of 255.255.255.128， each interface does require an IP address on a unique IP subnet.
C.With a network wide mask of 255.255.255.0， must be a Layer 2 device for the PCs to communicate with each other.
D.With a network wide mask of 255.255.255.0， must be a Layer 3 device for the PCs to communicate with each other.
E.With a network wide mask of 255.255.254.0， each interface does not require an IP address.
多项选择题
An administrator is unsuccessful in adding VLAN 50 to a switch. While troubleshooting the problem，the administrator views the output of the show vtp status command， which is displayed in the graphic. What commands must be issued on this switch to add VLAN 50 to the database？（）
A. Switch（config-if）# switchport access vlan 50
B. Switch（vlan）# vtp server
C. Switch（config）# config-revision 20
D. Switch（config）# vlan 50 name Tech
E. Switch（vlan）# vlan 50
F. Switch（vlan）# switchport trunk vlan 50
多项选择题
Which of the following are types of flow control? (Choose three.)（）
A.buffering
B.cut-through
C.windowing
D.congestion avoidance
E.load balancing
多项选择题
相比动态路由哪两个是静态路由的优点是什么？（）
A.安全增加，因为只有在网络管理员可以改变路由表。
B.配置的复杂性会随着网络规模的增加。
C.路由更新会自动发送到邻居。
D.路由聚合路由器自动iscompued。
E.在末梢网络链路中的流量路由负载减少。
F.一种高效的算法来构建路由表，使用自动更新。
G.路由表，自动适应网络拓扑变化。