In asynchronous serial communication the physical layer provides__________________?

A. CD
B. CD-RW
C. DVD
D. RPM

A. My Computer
B. Tool Bar
C. Task Bar
D. Recycle Bin

A. Keyboard
B. Mouse
C. Joystick
D. Track ball

A. Name button
B. Address button
C. Domain bar
D. Address bar

A. distributed database system
B. a single server
C. a single computer
D. none of these

A. Control, Alt
B. Function, Toggle
C. Delete, Insert
D. Caps lock, Num lock