ANSWER: BOT
EXPLANATION: When a PC is experiencing the listed effects, it thus depicts that the PC is under attack by a bot, which is a type of script or software application that establishes automated tasks via command.
However, a bad bots often initiate malicious tasks that gives room for attackers to take control over an affected PC remotely, most especially for fraudulent activities. 
When several affected computers are connected, they form a botnet connection. 
 
        
             
        
        
        
Answer:
b. ethernet
Explanation:
It was an ethernet that was developed in the 1970s that improved the ability to send the information over the network. It is the most widely used method to connect the computers in a LAN or the local area network, ever since 1980 when it was first introduced for commercial use. And it is being used in bulk even today.