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1 change: 1 addition & 0 deletions W10D2/menu.md
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钟逸超 [notes](note_Yichao_Zhong.md)
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# Note-W10D2



## Async and Sync

### Interruption

(可多个)外部设备单向打断CPU进程

访问模式:**Daisy Chain**

使用超立方体,提高维数,压缩直径大小

资料流的传输方式:Virtual Circuit

### Internet

- ATM|ISDN (euro)
- ATM: Async Transfer Mode 异步传输
- **TCP|IP (USA)**
- 异步网络,同步系统

网络:网络的构建&Communication的技术

Softwares:

- SNMP
- OSPF
- **DNS**: (url->IP, 最大的数据库)



#### 数字密码学

FHSS:跳频。用扩频码序列去进行频移键控调制,使载波频率不断地跳变。跳频图案的伪随机性和跳频图案的密钥量,使跳频系统具有保密性。

CDMA:使用多种不相干(正交)语言的同时传输,类似傅里叶变换。

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- [钟逸超](Note_W14D1_Yichao_Zhong.pdf)