Answer: OSI system is called Open System Interconnection because It provides the collection of protocols for the connection of different system to connect with any dependence on any other system or network.
Explanation: Open system interconnection establishes a connection between the different system for the communication purpose using several protocols and software standards .It has no dependency or any network or other system to do the functioning and works using the seven layers of the OSI architecture.Thus, that is why OSI system known as open system.
Answer:
See the attached picture.
Explanation:
See the attached picture.
Answer:
Ctrl+Alt+Del
Explanation:
It will take you to the task manager and you can highlight the program that is frozen, right click on it and select end task. Or hard reboot as a last resort.
Answer:
Explanation:
Given
Power at point A = 100W
Power at point B = 90W
Required
Determine the attenuation in decibels
Attenuation is calculated using the following formula
Where 
t and 
t
Substitute these values in the given formula
<em>(Approximated)</em>
