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.
Answer: Joystick is the only one that makes sense, a stylus and digitizer are both used on drawing tablets, not computer games.
Blaster Worm., the worm has been designed to tunnel into your system and allow malicious users to control your computer remotely. A Trojan horse is not a virus. It is a destructive program that looks as a genuine application. Unlike viruses, Trojan horses do not replicate themselves but they can be just as destructive.
The primary source of help for technical problems with BC Online (computer settings, password, etc.) is: The Instructor
<h3>Computer Technical Problems</h3>
Usually when we have problems on our computers, depending on the type of problem we can call the attention of a technician or follow the advice of an instructor or the message prompt on the software or website.
However, when it comes to technical problems such as Computer settings or password, we have to make sure we follow the instructions given by the instructor primarily especially because BC Online from the question is a type of Government Registry Information that is used by the citizens with the aid of instructors.
Read more on computer technical problems at;
brainly.com/question/17506968