Answer these 20 points
the best answer will be marked as brainliest
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Answer:
3. (i) When There is no Wifi you can Connect to Internet just by Your SiM operator or telecom operator who allows you to connect to internet at some charges.
(ii) You can also Connect to Internet by Boomband/Ethernet Cable it is an optical wire network which many Internet Service Providers (ISP) provide for internet Connectivity at Monthly, Quarterly and Yearly Charges. Some ISP are DEN, Fibernet, Nextra, Siti etc.
4. (i) We can Protect a network from unauthorised acess by putting passphrase/password on entry of that Network.
(ii) We can also Restrict any device from Connecting to our network just by blocking its IP Address on that Network.
5. LAN ( Local Area Network )
Thunder is a very loud sound that is made sometimes during a very big rain storm. It can sound like a boom, a crash, or a rumble. Thunder is made when lightning strikes. The energy from the lightning heats up the air so much that it makes a kind of explosion.