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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What is the broadcast address of the host 172.20.100.200/19?
सही उत्तर: क) 172.20.127.255
/19 gives third-octet blocks of 32: 100 lies in 96-127, so the subnet is 172.20.96.0 and its broadcast is 172.20.127.255.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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How many usable host addresses does a /30 subnet provide, which makes it popular for point-to-point router links?
सही उत्तर: ख) 2
A /30 has 4 addresses: one network, one broadcast and 2 usable hosts, exactly enough for the two ends of a link.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The four networks 192.168.0.0/24, 192.168.1.0/24, 192.168.2.0/24 and 192.168.3.0/24 can be summarised (supernetted) into the single route:
सही उत्तर: घ) 192.168.0.0/22
Four contiguous /24 networks starting on a multiple of 4 combine into one /22 (24 - 2 = 22).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What is the last usable host address in the subnet 192.168.1.64/26?
सही उत्तर: ग) 192.168.1.126
192.168.1.64/26 covers 64-127; 127 is the broadcast address, so the last usable host is .126 (the first is .65).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Are the hosts 172.16.17.30/20 and 172.16.28.15/20 on the same subnet?
सही उत्तर: ग) Yes, both belong to 172.16.16.0/20
With /20 the third octet changes in blocks of 16: 17 and 28 both fall in 16-31, so both are in 172.16.16.0/20.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The wildcard mask (inverse mask) used in router access lists for a /26 network is:
सही उत्तर: घ) 0.0.0.63
The wildcard mask is 255.255.255.255 minus the subnet mask: 255 - 192 = 63, giving 0.0.0.63.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A network uses the subnet mask 255.255.248.0. How many usable host addresses can each subnet hold?
सही उत्तर: ख) 2046
255.255.248.0 is /21, leaving 32 - 21 = 11 host bits: 2^11 - 2 = 2046 usable hosts.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What is the broadcast address of the subnet containing the host 192.168.5.100/28?
सही उत्तर: ख) 192.168.5.111
A /28 subnet has blocks of 16 addresses; 100 lies in 96-111, so the broadcast address is 192.168.5.111.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What is the network address of the host 10.20.30.40/12?
सही उत्तर: क) 10.16.0.0
A /12 mask is 255.240.0.0; the second octet 20 ANDed with 240 gives 16, so the network is 10.16.0.0.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The SQL statement used to create an index on the 'name' column of table 'student' is:
सही उत्तर: ग) CREATE INDEX idx_name ON student(name)
CREATE INDEX index_name ON table(column) builds an index that speeds up searches on that column.
💬 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।
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