中等ict-u03-d02
The main role of a modem is to:
A. Interface the local network to the service provider's link, converting signals between formats✓ 答案
B. Switch frames between devices inside one VLAN only
C. Store the school's management database
D. Print documents on the network printer
解說
A modem modulates and demodulates signals so data can travel over the line the provider supplies, including a telephone or cable line. Switching inside the site is the switch's job.