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I stumbled across this article which, unlike any ambiguous article I've read, states that my
"pencil-thin network cable (or wireless network adapter) at the back of your computer contains 65,536 microscopic pathways inside it."
I've always been told that a port is just a number (not a wire) used to distinguish different virtual connections from each other, so how can these two explanations co-exist?
- Also, this can't mean that some of the network cable isn't being used to transfer signals when a port isn't being used does it?
The article also said that
packets are required to stop at each network node and:
- Find an open port,
- Pass the identification test that will allow it through that port, and if not,
- Move to the next port and try again, until it is allowed to pass through the toll.
- I thought packets contained a specific destination port, so why would they search for a new open port?
- Finally, what does it take to pass an identification test?
1The article makes no sense at all. Ports are in no way physical, and creating cables with that many strands would be rediculously expensive to make.
Ports simply act as a way to direct traffic to the correct application once it has reached the client system. Other than torrents (which are designed specifically to use a range of ports) most common applications listen in on specific ports and wouldn't work. Torrents get slowed down since it would find it harder to find seeds, but would still work. – Journeyman Geek – 2012-01-29T23:20:23.673