I have basic understanding of networking. As far as I can understand IP add and MAC add are unique . At switch level (layer 2) you need MAC add and at router level (layer 3) you need IP add to communicate on internet. Ports belong to PC's and PC can run different services on different ports. Websites also have IP add and these websites are hosted on a server (PC) . You can scan a website IP for open ports as well. I am unable to grasp all this that how can you communicate to a website since it does not have a MAC add? How can you scan a website IP for open ports? How come a single server PC can have multiple IP's in the for of websites? Please guide. Thanks
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