一、单项选择题(总题数:70,分数:75.0分)
Computer Network (1)(CND) refers to the strategies and efforts undertaken to secure data and information within a computer network. It involves implementing security measures and conducting security awareness and training programs to protect against potential(2). Many different cyber plagiarize is security solutions can contribute to your organization's CND DOG including(3), VPNs, access control systems, and more. CND involves protection, detection, and reaction.(4) provides a foundation for the program. It is the base of operation, from the base, and detected incidents, the(5)includes taking immediate steps to stop an incident in progress.
1、问题1(分数:1.00分)
A、Description
……此处隐藏48176个字…… OP :拒绝所有来自于192.168.2.0网络的流量进入。A INPUT -s 192.168.3.0/24 –p tcp –m tcp -dport 22 -j ACCETP :允许来自于192.168.3.0网络的SSH流量进入。
A INPUT -i lo -j ACCEPT:允许所有lo接口的流量进入。
A INPUT -j DROP:拒绝所有进入的流量。
A OUTPUT -p icmp –m icmp --icmp-type 0 -j ACCEPT :允许ICMP的请求响应流量放行。
A选项描述反了,B选项仅允许来自于192.168.3.0网络的SSH流量,C选项仅允许来自于192.168.1.0网络的icmp流量。
75、RFID技术在物联网应用中,主要实现( )功能。(分数:1.00分)
A、感知
B、计算
C、标识
D、数据传输
答案: C
解析:
物联网应用可以分为三层:(1)感知层:主要实现标识、识别功能;其中,采用射频识别((RFID)技术、NFC技术实现物体的标识功能,采用传感器技术实现物体的识别、感知功能。(2)传输层:主要实现信息的传输,采用无线网络技术、互联网技术。(3)智能应用层:包括各种智能应用,例如智能交通、电力、医疗、教育等应用平台。