Question

When compared with an RS232C serial port, the USB (Universal Serial Bus):
1. Supports a lower range of peripherals
2. Supports a faster transfer rate
3. Does not support 'Hot plug-ability'
4. Controller in PC can not detect the presence or absence of USB devices

Answer 1

Correct Answer - Option 2 : Supports a faster transfer rate

RS 232 C	USB (Universal serial Bus)
It can connect with lower range of periphenals Comparatively slower transfer rate E.g. \(20\;k\;band\;\left[ {band = \frac{{symbol}}{{sec}}} \right]\) It does NOT support Hot plug ability Here PC can not detect the process or absence	USB can cannot with higher range of peripehenals. Comparatively higher transfer rate. E.g. 12 mbps It support hot plug ability Here PC can detect the process or absence

Note:

• Hot plug ability : When computer’s opening system automatically recognize the presence or absence of any device, while computer is running.
• RS232 C

RS → Recommended standard for serial communication

C → virsion (3^rd)