【导读】
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1. [单选题]介质工作在OSI的哪一层()
A. 物理层
B. 数据链路层
C. 网络层
D. 传输层
2. [单选题]默认情况下,RIP定期发送路由更新的时间是()
A. 15S
B. 30S
C. 60S
D. 90S
3. [单选题]During the boot sequence, a Ezonexam 2800 series router needs to locate and load an operating system. What is the default order the router uses to find an operating system?
A. ROM, TFTP server, Flash
B. Flash, TFTP server, ROM
C. Flash, NVRAM, TFTP server
D. Flash, ROM, TFTP server
E. Flash, TFTP server, RAM