以太局域网中需要传输的数据必须预先组织成若干帧,每一数据帧的格式如下所示:
其中“?”表示的是______。
A. 填充信息
B. IP地址
C. 协议信息
D. 有效载荷
查看答案
What is Peter Jackson writing this letter for?
A. He wants to thank this company.
B. He wants to get a job.
C. He is angry with the company.
Why does Peter want to be a driver?
A. Because he has nothing to do.
Because he has dreamed to be a driver since he was very young.
C. Because his father told him to do so.
Besides driving, what else has Peter learned in school?
A. English and Chinese.
B. History and swimming.
C. English and history.