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.
One way to protect against a security threat to a computer system is to Avoid external links with inconsistent URLs.
<h3>What is malware?</h3>
Malware is any programme that is purposely designed to disrupt a computer, server, client, or computer network, leak private information, obtain unauthorised access to information or systems, deny users access to information, or otherwise interfere with the user's computer security and privacy.
One way to protect against a security threat to a computer system is to Avoid external links with inconsistent URLs. The reason for this is that such links may contain malware or spyware.
Learn more about Malware:
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Answer:
B=10
Explanation:
(-21) x 0=0 and (-50)÷(-5)=10
0+10=10
