Characteristic impedance of cat 5e utp cables is 100 ohms.
Cat 5, Cat 5e, Cat 6, Cat7
Typically you would use a CAT-5e or CAT-6 UTP (Unshielded Twisted Pair) network cable.
Yes, CAT 5E is well-suited for gigabit ethernet. CAT 6 will also work just fine.
CAT-5, and CAT-5e.
Yes
If you can use fiber optics. If not try to use CAT-5e at least, CAT-6 is recommended.
It should be at least UTP CAT-5, if your equipment supports gigabit connection use CAT-5e.
RJ-45
Cat 5, Cat 5e
Cat 5 e stands for Category 5 enhanced.
Copper.