What is the difference between all these internet cables?

What is the difference (if any) between Ethernet cables, RJ45, patch cables and crossover cables? I think RJ45 is the socket at the end, but I may be wrong. What (in the UK) is the cable that goes from the phone socket to the router (what is the name and the socket designation)? What is the cable that... show more What is the difference (if any) between Ethernet cables, RJ45, patch cables and crossover cables?

I think RJ45 is the socket at the end, but I may be wrong.

What (in the UK) is the cable that goes from the phone socket to the router (what is the name and the socket designation)?

What is the cable that goes from the router to the PC? Again, name and socket designation.

Which cable should I shop for to be about 30" long and go from the router to my PC ethernet port?
4 answers 4