CCNA系列认证单项选择题每日一练(2020.04.23)

单项选择题
The Testking corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?（）
A. The number of broadcast domains will be decreased.
B. It will make the broadcasting of traffic between domains more efficient between segments.
C. It will increase the number of collisions.
D. It will prevent segment 1's broadcasts from getting to segment 2.
E. It will connect segment 1's broadcasts to segment 2.
单项选择题
Which type of attack is characterized by flood of packet that requesing a TCP connection to a server?（）
A.denial of service
B.brute force
C.reconnaissance
D.Trojan horse
单项选择题
在将ACL应用到路由器接口的过程中，哪个流量将被指定为出站流量？（）
A.从源IP地址到路由器的流量
B.离开路由器、流向目的主机的流量
C.从目的IP地址到路由器的流量
D.路由器找不到路由表条目的流量
单项选择题
Acknowldgement, Sequencing, and Flow control are characteristics of which OSI layer?（）
A. Layer 2
B. Layer 3
C. Layer 4
D. Layer 5
E. Layer 6
F. Layer 7
单项选择题
自动化生产线上的振动传感器检测到异常状况。传感器与控制器通信，控制器将自动关闭线路并发出警报。该场景代表哪种类型的通信？（）
A.机器到人员
B.机器间
C.人员间
D.人员到机器