a. STP - The extra covering in shielded twisted pair wiring protects the transmission line from electromagnetic interference leaking into or out of the cable.
b. UTP - Unshielded twisted pair (UTP) cables are widely used in the computer and telecommunications industry as Ethernet cables and telephone wires.
B. Coaxial is a type of electric cable that has an inner conductor surrounded y a tubular insulting layer, surrounded by a tubular conducting shield.
C. Fiber Optic is consisting of or using thin flexible fibers with a glass core through which light signals can be sent with very little loss of strength.
Difference Between Straight Through and Crossover Cable
Straight through and crossover cables are wired differently from each other. One easy way to tell what you have is to look at the order of the colored wires inside the RJ45 connector. If the order of the wires is the same on both ends, then you have a straight through cable. If not, then it's most likely a crossover cable or was wired wrong. At present, the straight through cable is much more popular than crossover cable and is widely used by people.
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