The statement which does not hold true for modems is
Answer: A
Correct answer: The fastest transfer rate is 56kbps
56 kbps is the ceiling for a dial-up modem on a voice line, but cable and DSL modems run far faster, so the statement is not true of modems in general. The other two statements - the expansion of the name and the use of telephone lines - hold for the dial-up modem the question has in view.
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The minimum number of rows and columns in MS Word document is
Answer: A
Correct answer: 1 and 1
A table must have at least one cell, which means at least one row and one column.
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____________ topology is not of broadcast type.
Answer: A
Correct answer: Star
Bus and ring both deliver every signal to every station, so both are broadcast topologies. In a star the central device forwards each transmission only where it is needed, so the arrangement is not broadcast by nature.
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Network components are connected to the same cable in the ............ topology.
Answer: C
Correct answer: bus
In a bus topology every station taps into the same length of cable, so one break can disable the whole segment. A star gives each node its own cable to a central device.
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Which of the following is the fastest communication channel?
Answer: B
Correct answer: Optical fiber
Speed here means capacity, and optical fibre carries far more data per second than radio or microwave links - gigabits and beyond against megabits. All three propagate at close to the speed of light, so it is bandwidth rather than propagation that separates them.
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Other than the dial-up connection, the network connection applicable to RAS is
Answer: D
Correct answer: All of the above
Remote Access Service is not tied to the telephone: it works over a VPN across the internet, over ISDN, and over DSL, as well as over a dial-up line.
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Which one among the following protocol is not used in internet?
Answer: D
Correct answer: None of the mentioned
HTTP carries web pages, DHCP assigns addresses and DNS resolves names - all three are in daily use on the internet, so none of them is the exception.
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In Word, the mailing list is known as the ____________.
Answer: A
Correct answer: Data source
In a mail merge the list of names and addresses is the data source, and the letter is the main document. The two are combined to produce one copy per record.
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Which topology is used for large networks?
Answer: D
Correct answer: Star
A star scales best because each node has its own link to the centre: adding a node affects nobody else, and one failed cable takes down one machine rather than the network. A bus or ring shares one medium among all stations.
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What is the function of a web browser’s cache ?
Answer: A
Correct answer: To store copies of recently visited page resources for faster reloading
The cache keeps images, stylesheets and scripts on disk so a revisited page need not fetch them again. This is why clearing the cache can fix a page that appears to be displaying an outdated version.
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