The electromagnetic or light waves representing data are called:
Correct answer: B. signal
- A. Information
- B. signal
- C. Sender
- D. Frequency
Explanation
In data transmission, a signal is a physical representation of data that can be transmitted over a communication channel. Electromagnetic or light waves are one way to carry this signal. The signal can be modulated to encode the data, and then demodulated at the receiving end to recover the original data.
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Networking covers LAN, MAN, WAN and wireless networks, network topologies, transmission media, devices such as switches, routers and modems, and the OSI and TCP/IP models. Internet concepts include IP addresses, DNS, URLs, web browsers, email, protocols such as HTTP, HTTPS, FTP and SMTP, and basic network security.
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