Which of this is NOT the cable type used by old 10Base2 Ethernet networks?Thin coaxialThick coaxialTwisted pairFiber opticUTP

To determine which of the cable types is NOT used by old 10Base2 Ethernet networks, we need to analyze the types of cables associated with 10Base2.

1. 10Base2 Cable Types:

   • Thin Coaxial Cable: Used in 10Base2 Ethernet networks, also known as cheapernet.
   • Thick Coaxial Cable: Used in older Ethernet networks but not specifically 10Base2; instead, it was associated with 10Base5 and other forms.
   • Twisted Pair: Not used in 10Base2; it's associated with newer Ethernet standards.
   • Fiber Optic: Not used in 10Base2; fiber optics came into play later in networking.
   • UTP (Unshielded Twisted Pair): Is a type of twisted pair cable but is not used in 10Base2.

2. Conclusion:

   • Among the listed options, Fiber Optic is definitely not used by 10Base2 Ethernet networks and is a more advanced technology that was introduced after coaxial cable technology.

Final Answer

Fiber optic is NOT a cable type used by old 10Base2 Ethernet networks.