The user ID in email can consist of?
Correct answer: D. All of the above
- A. Alphabets
- B. Digits
- C. Underscore
- D. All of the above
Explanation
A user ID in an email address can consist of letters (alphabets), numbers (digits), underscores (_), and sometimes even periods (.) and hyphens (-) according to various email service providers.
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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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