Computer Science Ques 551
Question: HUB is
Options:
A) Layer 1 device
B) central device
C) Dumb device
D) Ail of the above
E) None of these
Show Answer
Answer:
Correct Answer: D
Solution:
- In computing, echo is a command in DOS. OS/2. MS-windows. UNIX that places a string on the computer terminal. It is typically used in shell scriptes and batches files to output status text to the screen or a file.