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本篇主要是计网考试题型以及考点内容的一个概述,具体题目我会后续发文详细分析。
1.考试题型
一、选择题(40道,每道1分,题库)
二、简答题(6道,每道的分值都不一样,共35分,课后题)
三、计算题(1道,10分)
四、应用题(1道,15分)
可以看到选择题将近站了分值的一半,所以把重点放在选择题上,简答题每年都会有重复的题,但一半一半,也有很多不一样的,所以简答题不好拿分,后面我尽量把简答部分完整地整理过来,太多了记不住,能拿几道题就可以,计算题和应用题也是到后面再发文。
2.重点内容
1. 各种概念类的东西,了解了解,选择题可能出现;
2. 计算机网络分类,按地域划分(广域、城域、局域、个人局域);
3. 网络性能指标,时延,会计算(发送时延、传送时延等),注意单位转换;
4. 计算机网络体系结构;
5. 协议、服务,了解;
6. 信道极限容量重点掌握,信噪比、香农公式,根据公式可以得出什么关系;
7. 信道复用技术是重点,码分复用,码片序列;
8. 传输系统不看;
9. 宽带接入技术,掌握 ADSL 技术,其它了解即可;
10. 数据链入层的作用、范围及功能是什么,三个基本问题(封装成帧、透明传输、差错检测);
11. 差错检测重点掌握,不会考概念,要计算,帧检验确定;
12. 点对点,它的特点,帧格式,代表什么意思知道;
13. 适配器,判断硬件属于哪一层;
14. 广播信道,CSMA/CD 协议工作原理、争用期,51.2微妙、512比特、64字节代表什么意思;
15. 物理地址,长度、组成、表达方式;
16. MAC 帧的格式,封装成帧如何实现;
17. 高速以太网不作为重点,了解;
18. IP 协议,IP 地址及其表示方式,A、B、C 三类地址分类;
19. IP 地址区别硬件地址;
20. ICMP 了解;
21. 路由选择协议,RIP 重点掌握;
22. IPV6 与 IPV4 过渡,IPV6 的表达形式、长度及构成;
23. TCP 重点复习,可靠传输工作原理;
24. 滑动窗口重点掌握,如何实现、原理;
25. 流量控制与拥塞控制之间的联系和区别,拥塞原因,策略解决,超时怎么做。