21.
Which of the following is/are services provided by the internet.
1. Websites
2. Electronic mail
3. Newsgroup
4. Discussion groups

24.
The . . . . . . . . is a communication protocol used across the Internet for especially time-sensitive transmissions such as video playback or DNS lookups.

27.
. . . . . . . . is a computer network protocol that allows computers to unambiguously identify network resources.

29.
Findout the odd statement regarding Firewall.

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