湯姆遜筆經(jīng)

筆試一共5個部分，其中第一部分是C語言的，選擇，改錯，什么都有，有4頁紙那么多，沒法抄。把后邊4部分抄回來了，如下。

Part 2. Network

1. please enumerate all TCP/IP protocols for every layer as many as possible based on TCP/IP 5-layer reference model.

2. what is vlan? why we need it?

3. please describe the PPP protocols.

4. please describe the difference between Hub, Switcher and Router.

Part 3. Operating System

1. please describe the difference between process and thread.

2. please list the scheduling mechanisms of a real time OS as you know, and describe their characteristics, respectively.

3. please explain the typical handle process of OS, when an external interruption take place.

4. please list inter-process communication mechanisms in Linux or windows as many as possible.

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