1. The CPU (central processing unit) does the calculations and comparisons that make the computer work. They use millions of transistors to do so.
2. The ROM holds all the programs on the computer. This is most often the "C" drive.
3. The ROM also has the operating system that is used to run the computer.
Bitlocker Encryption can be used during the process of authenticating your computer with a TPM, during the process of authenticating your account with a USB flash drive, and most of the authentication through text messages.
Ping and traceroute locally and on a remote server. Locally it will tell if you local setup is correct and to test your network communication it needs to travel over a network.
A or b i think hope it helps good luck and i hope it helps