2.)

UTP

Gigabit Ethernet (over copper), 1000baseT
Speed: 1000 Mbps
Max Len: 100
Meters Cable: UTP, RJ-45 connectors

Fast Ethernet, 100baseT
Speed: 100 Mbps
Max Len: 100
Meters Cable: UTP, RJ-45 connectors

Twisted Pair Ethernet, 10baseT
Speed: 10 Mbps
Max Len: 100
Meters Cable: UTP, RJ-45 connectors

Thin Ethernet , 10 base 2
Speed: 10 Mbps
Max Len: 185
Meters Cable: RG-58 type coax, 50 ohm impedance

Thick Ethernet, 10 base 5
Speed: 10 Mbps
Max Len: 500
Meters Cable: RG-58 type coax, 50 ohm impedance

Advantages:
It is a thin, flexible cable that is easy to string between walls. Most modern buildings come with CAT 5 UTP already wired into the wall outlets or at least run between the floors. Because UTP is small, it does not quickly fill up wiring ducts. UTP costs less per foot than any other type of LAN cable.
Disadvantages:
Twisted pair’s susceptibility to the electromagnetic interference greatly depends on the pair twisting schemes (usually patented by the manufacturers) staying intact during the installation. As a result, twisted pair cables usually have stringent requirements for maximum pulling tension as well as minimum bend radius. This relative fragility of twisted pair cables makes the installation practices an important part of ensuring the cable’s performance.

STP