HACKER: Is a person that steals data. A person that can break into a computer.
A VIRUS: A virus is a software that causes hard drive malfunctions and deletes files and it can infect thousands of computers by emails.
A ROUTER: A router is a device that connects you to the Internet.
What can happen when packets of information are sent by internet? There can be a lot of packets of information so it's slow, you can find viruses, interferences, hackers etc...
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