Answer:
Cokies
Explanation:
Cokies are files that saves on a website server that enables the website to recognize a computer when it visit the website. So for the first time a computer visit a website, the website brings a little pop up that ask the user to accept Cokies and if the user accepts, the website will be able to recognize the computer when next it visit.
A proxy server. A system requests information from the internet, and that traffic is routed through the proxy server before arriving to the requesting system.
This is why proxy servers are used for hiding identity and being more secure, as internet traffic would show the IP address of the proxy server, and not the requesting system, though this often depends on the type of proxy server, as some proxy server's main objective isn't anonymousity, but rather efficiency.
The word DoS refers to the Disk Operating System. In the case given above, if it happens that there is a distributed DoS attack, the attacker then sends messages directly to the BOTS. Bots refer to internet or web robots. Hope this answer helps. The answer is the first option.
