कम्प्युटर र सूचना प्रविधि (प्राविधिक)
कम्प्युटर र सूचना प्रविधि (प्राविधिक)
Computer & IT (Technical) · ५,०७६ प्रश्न
५,०७६ प्रश्न उपलब्ध। मोड छान्नुहोस्:
कम्प्युटर र IT: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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A device that lets wireless clients connect to a wired LAN is a:
सही उत्तर: ग) Wireless access point
An access point bridges Wi-Fi clients to the wired Ethernet network.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Zigbee, a low-power wireless technology used in smart-home sensors, is based on which IEEE standard?
सही उत्तर: ख) IEEE 802.15.4
Zigbee builds on IEEE 802.15.4 for low-rate, low-power personal area networks; 802.16 is WiMAX.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In wireless LANs, the 'hidden terminal' problem is reduced by using:
सही उत्तर: क) RTS/CTS (Request to Send / Clear to Send) frames
Before sending, a station sends RTS and the access point replies with CTS, which is heard by hidden stations so they defer.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Wi-Fi networks based on IEEE 802.11 commonly operate in which frequency bands?
सही उत्तर: क) 2.4 GHz and 5 GHz
Wi-Fi mainly uses the unlicensed 2.4 GHz and 5 GHz ISM bands (newer Wi-Fi 6E also uses 6 GHz).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In Windows, the command 'arp -a' displays:
सही उत्तर: घ) The ARP cache of IP-to-MAC address mappings
arp -a lists the IP addresses on the local network for which the computer has learned the MAC addresses.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which command displays active TCP connections and listening ports on a computer?
सही उत्तर: ग) netstat
netstat (network statistics) lists current connections, listening ports and, with options, routing tables and statistics.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which Windows command queries DNS servers to find the IP address of a domain name?
सही उत्तर: घ) nslookup
nslookup sends DNS queries and shows the answering server and the resolved addresses.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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At the top of the DNS hierarchy, the root zone is served by root name servers known by how many named identities (A to M)?
सही उत्तर: ख) 13
There are 13 root server identities, a.root-servers.net to m.root-servers.net, each run as many anycast instances worldwide.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A reverse DNS lookup, which finds the host name for a given IP address, uses which record type?
सही उत्तर: ग) PTR
PTR records live in the in-addr.arpa (IPv4) or ip6.arpa (IPv6) domains and map addresses back to names.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which DNS record type creates an alias, such as pointing www.example.com to example.com?
सही उत्तर: ख) CNAME
A CNAME (canonical name) record makes one name an alias of another name.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
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