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Absolutely! Your router supports gigabit ethernet, which is far faster than even the fastest consumer internet connections, so you're fine.
Cisco gigabit switches can be found in both 24 and 48 port varieties, commonly. Of course, with the ever changing field of technology, this information could be outdated very quickly.
Rusted connectors on a vehicle's battery could be the cause of a car that won't start. The process for cleaning these connectors can be detailed in full on wikiHow.
Cat5e is required for the standard for gigabit ethernet; cat5 is only good for up to 100Mbps. Cat6 is better than cat5e; it will probably give you lower signal degradation over longer distances and less interference from external sources, which can improve speed and quality of connections. You could run gigabit ethernet over normal cat5, but the standard makes no promises about how well it will work. Cat5e and cat6 differ from cat5 in having more twists per inch, which reduces interference at the cost of using more copper.
Maybe, depending on what you mean by "phone cable." Those intended for home use probably won't work (the connectors aren't really even compatible), but those meant for 8-pin office phones might work. If you're not sure the cables are compatible, it's probably not a good idea to try it; you could potentially damage your hardware. No ethernet cable are not phone cable and only look the same. The ethernet plugs are larger
"You can purchase an ethernet card at your local walmart in the electronics section. You could also purchase a very cheap one online, that will work efficiently."
Shops that sell housewares or electrical equipment usually sell scart connectors. Some supermarkets sell scart connectors as well. Scart connectors can be bought online in websites such as Amazon or Ebay.
You need a internet connection on your Xbox to download games on the marketplace. You could use ethernet but you can also use wifi (wireless).
You would use a cat5 (usually called ethernet) for connecting maybe a computer to a switch. Or connecting a server to a router/firewall... Its probably one of the most common network cables you could use, well for home and small to medium sized buisnesses anyway.
The layer 2 protocol that could be used inside of network A and network C is ethernet. Ethernet is a family of computer networking technologies for local area networks.
You could buy an ethernet splitter from Amazon.com copy and paste the link below into your file browser http://www.amazon.com/s?ie=UTF8&search-alias=electronics&field-keywords=ethernet%20cable%20splitter&page=1