Digital communications require a communications channel and standards.
Correct Answer:
Verified
Q4: An email address reveals no information about
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Q5: Smartphones use Wi-Fi in addition to 4G
Q6: Email addresses cannot contain spaces.
Q10: Cybercriminals often send spam containing spelling and
Q11: Text messaging is a synchronous service.
Q13: If you want to change something posted
Q13: Spam filters are often built into email
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Q18: All servers on the Internet follow TCP/IP
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