Class 9 · कंप्यूटर · 255+ Q&A
IT basics, hardware, software, internet safety and MS Office for Class 9. Showing 5 of 5 on page 1 / 1.
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LAN: lab or campus (school Ethernet). MAN: a city network. WAN: large distances; the internet is the biggest everyday WAN. Speed, ownership and area increase as we go from LAN to WAN. Wi-Fi can be part of a LAN.
A modem converts signals so data can travel on the ISP link. A router forwards packets between networks and often shares one internet connection among many lab PCs. Home boxes may combine both. Students need the roles, not brand menus.
It is a numeric label that identifies a device on a network so packets can be delivered. Many school labs use private IPv4 such as 192.168.0.10. It is not a home postal address and should not be confused with an email id.
Guided: twisted pair, coaxial, optical fibre — signal travels in a cable. Unguided: radio, microwave, infrared, satellite — through air/space. Fibre is fast and resists electrical noise; radio gives mobility (Wi-Fi).
Bandwidth is capacity — how much data per second the link can carry (Mbps). Delay (latency), Wi-Fi interference and a busy server also affect how fast a page opens. A wide pipe with a far server can still feel slow.
Class 9 Computer में कितने प्रश्न हैं? 255 महत्वपूर्ण प्रश्न: 174 MCQ, 50 लघु, 31 दीर्घ।
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