Answer:
When we know how many times a loop is going to occur when we make use of them for a loop. Like if we want to print a number 100 times, then we make use of them for a loop. However, if we only know the condition then we make use of the while loop.
Like while( sum<=100):
sum +=i
i=i+1
And this will add till sum <=100.
Hence, while requires us to know the number of times the loop will take place. And while requires a condition. On many occasions, both can be used. However, it must be understood that we increment the loop number at the end in case of the while loop and the beginning in case of a loop.
Explanation:
Please check the answer section.
Answer: star topology.
Explanation:
The layout of the way how the computers in a netword are interconnected is called network tipology.
Some types of network topologies are:
1) Point-to-point tipology: all the computers are connected to each other directly (computer-to-computer, in pairs, this is a direct link between each two computers).
2) Bus topology: all the nodes (computers or server) are connectect to a maing cable.
3) Star topology: all the computers are connected to a central computer or server which is called central hub. This is the layout described in the question.
4) Ring topology: the computers are connectec in a circular path; each computer is connected to the next computer.
5) Mesh: every computer is connected to every other computer.
The answer is an RFID tag. Its a device capable of sending short-range signals, therefore making it capable of sending identifying information to a receiver placed close to the tag.