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.