计算机网络期末复习【较实用】

Myth丶恋晨 2023-07-04 04:37 25阅读 0赞

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTg3NjEy_size_16_color_FFFFFF_t_70][]**![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTg3NjEy_size_16_color_FFFFFF_t_70 1][]**若对你有帮助，记得点赞、关注我哦！

**所用教科书：计算机网络(第7版) 谢希仁 编著 自带课后题答案，但不详细**

一学期后の亲身体验：这是一本超厚、难嚼、没看多少的书。基本看完了b站王道计网的课，但还是很绝望。

∵我们老师(博士)要去美国出差，提前考试 ∴划了些书上的课后题，考题作适量改动（努力不会不及格的那种）

> ### 以下答题过程全由作者自写，若有错误欢迎留言or私信 ###

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（1）011011111011111000（每5个1后插入一个0） （2）00011101111111111110（每5个1后删除一个0）

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![20200207235629381.png][]结果没考这4个，且要求写英文全名&中文意思，不用写作用

**IP（Internet Protocol网际互连协议）**：实现网络互连。使参与互连的性能各异的的网络从用户看来好像是一个统一的网络。网络协议IP是TCP/IP体系中两个最主要的协议之一。与IP协议配套使用的还有以下三个协议。

**ARP（Address Resolution Protocol地址解析协议）**：解决同一个局域网上的主机或路由器的IP地址和硬件地址的映射问题。

**RARP（Reverse Address Resolution Protocol反向地址解析协议）**：解决同一个局域网上的主机或路由器的IP地址和硬件地址的映射问题。

**ICMP（Internet Control Message Protcol网际控制报文协议）**：提供差错报告和询问报文，以提高IP数据交付成功的机会。

考了PPP协议（Point to Point Protocol点对点协议）还有3个记不得了，第一题就懵了纯属正常

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（1）分组的目的站IP地址为：128.96.39.10

与子网掩码255.255.255.128相与得128.96.39.0，可见该分组经接口0转发。

（2）分组的目的站IP地址为：128.96.40.12

①与子网掩码255.255.255.128相与得128.96.40.0，不等于128.96.39.0

②与子网掩码255.255.255.128相与得128.96.40.0，经查路由表可知，该项分组经R2转发。

（3）分组的目的站IP地址为：128.96.40.151

与子网掩码255.255.255.128相与得128.96.40.128，该分组转发选择默认路由，经R4转发。

（4）分组的目的站IP地址为：192.4.153.17

与子网掩码255.255.255.128相与得192.4.153.0。与子网掩码255.255.255.192相与得192.4.153.0，经查路由表可知，该分组经R3转发。（答案是对的，过程不太确定）

（5）分组的目的站IP地址为：192.4.153.90

与子网掩码255.255.255.192相与得192.4.153.64，经查路由表可知，该分组转发选择默认路由，经R4转发。

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![20200208002441899.png][]IP数据报固定首部长度为20字节

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![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTg3NjEy_size_16_color_FFFFFF_t_70 3][]大面积截图会有点糊，见谅

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTg3NjEy_size_16_color_FFFFFF_t_70 4][]更详细的讲解↓

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