Answer:
IBM's own Personal Computer (IBM 5150) was introduced in August 1981, only a year after corporate executives gave the go-ahead to Bill Lowe, the lab director in the company's Boca Raton, Fla., facilities. He set up a task force that developed the proposal for the first IBM PC.
<span>This is called an unshielded twisted pair cable, which is also known as a UTP cable. This type of cable has four pairs of wires that are twisted around each other. Because the wires are like this, the electrical interference is reduced.</span>
The answer is A due to the internet being a plethora of information being accessed by anyone and everyone with internet access. Any person of no background to certain information could claim mastery to the field and sway his/her audience to ways possible. Ensuring that the source of the information being read is from credible and reputable companies. You can do this by ensuring the information is from newspapers with names known all over the world or there are also sourced footnotes from the author where they could have cited some information from other articles.
The answer is 2 frequencies.
A Full-Duplex QAM 64 K Modem uses two frequencies. One frequency is used for upstream and the other for downstream. A variety of common QAM forms are available and include, 16 QAM, 32 QAM, 64 QAM, and 256 QAM. For example, for domestic broadcast use, 64 and 256 QAM are used for cable modem and digital cable TV. The modulation scheme for this modem uses both amplitude and phase.
