Which of the following statements about computer networks are true?
1.An intranet is a public network
2.The internet is a group of interconnected networks
3.An extranet is an internal network that can be accessed externally by authorised users
A1 & 2 only
B1 & 3 only
C2 & 3 only ✓ Correct
D1, 2 & 3
Correct answer: (C) 2 & 3 only
Explanation
Statements 2 and 3 are correct: the internet is a group of interconnected networks, and an extranet is an internal network reachable externally by authorised users.
Statement 1 is wrong because an intranet is a private network for an organisation, not a public one.
The internet links millions of networks worldwide using common protocols.
An intranet serves only the members of one organisation behind its security boundary.
An extranet extends parts of an intranet to trusted outsiders such as suppliers or partners.
All three rely on the TCP/IP protocol suite to exchange data.
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