Thank you, pal!
You are invited to my clubhouse!
Option A. is the correct answer the other three are not professional behaviour if you would like an explanation as to why they are not just comment
Answer:
Client server system, packets in the network and the discussion regarding two approaches have been done. See the attached pictures.
Explanation:
See attached pictures for explanation.
...something that the user knows.
Answer:
the system tray is located in the Windows Taskbar (usually at the bottom next to the clock) and contains miniature icons for easy access to system functions such as fax, printer, modem, volume, and more. Double click or right click on an icon to view and access the details and controls.
Explanation: in window 95