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 This is why clearing the cache can fix a page that appears to be displaying an outdated version.
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It is not a part of email address
Answer: D
Correct answer: Space ( )
An address may contain letters, digits, dots, underscores and hyphens, and exactly one @. A space is not permitted, since it would end the address wherever it appeared.
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In a piconet, there can be up to ________ parked nodes in the net.
Answer: C
Correct answer: 255
A piconet has one master and up to seven active slaves, but as many as 255 further devices may be parked - synchronised to the master but not currently exchanging data.
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It is the one which provides the facility of exchanging information between computing devices and is a combination of hardware and software.
Answer: B
Correct answer: Network
A network is the combination of hardware and software through which computing devices exchange information. A peripheral attaches to one machine and an expansion board sits inside one.
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Which service is used for sending or receiving main on the internet?
Answer: C
Correct answer: Email
E-mail is the service for sending and receiving messages. FTP transfers files and Gopher was an early document retrieval system, so neither carries mail.
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Which one of the following is the most important or powerful computer in a network?
Answer: C
Correct answer: Network Server
The server stores the shared data and runs the shared services, so it is both the most capable machine and the one everything else depends on.
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Mosaic is a
Answer: C
Correct answer: Web browser
Mosaic, released in 1993, was the first widely used graphical web browser and the ancestor of Netscape.
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The network that can be reached only from inside an organisation is the
Answer: A
Correct answer: Intranet
An intranet uses internet technologies but is reachable only from inside the organisation. An extranet extends limited access to chosen outsiders, and a VPN carries a private connection over the public internet.
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What is the Bluetooth wireless technology for
Answer: B
Correct answer: personal area network
Bluetooth is a short-range technology, reaching a few metres, and is defined as a personal area network standard - the space around one person and the devices they carry.
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