Ethernet cables are built from...
A. Twisted pair cables
B. Power cables
C. Fiber optic cables
D. Coaxial cables
A. Twisted pair cables
Ethernet cables are built from A. Twisted pair cables.
To determine the correct answer, you can use your knowledge about the different types of cables commonly used in networking. Ethernet cables are used to connect devices in a local area network (LAN) and transfer data using Ethernet protocols. There are different types of Ethernet cables, but the most common type is known as "twisted pair" cables.
Twisted pair cables consist of pairs of insulated copper wires that are twisted together. The twisting helps to reduce electrical interference, known as crosstalk, between adjacent pairs of wires. The wires are typically encased in a protective sheath, making the cable durable and resistant to external factors.
Twisted pair cables come in two main categories: unshielded twisted pair (UTP) and shielded twisted pair (STP). UTP cables are commonly used in most Ethernet applications. They are less expensive, flexible, and suitable for most residential and office environments. STP cables, on the other hand, have an additional layer of shielding that provides extra protection against external electromagnetic interference.
Therefore, based on this information, the correct answer is A. Twisted pair cables.