The range of frequencies that a medium can pass is called
Answer: D
Correct answer: Bandwidth
Bandwidth is the range of frequencies a medium can carry, and it is because that range limits how fast data can be sent that the word came to be used for data rate as well.
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In a ring topology, the data can be transmitted only if the computer possess
Answer: A
Correct answer: Token
In a token ring only the station holding the token may transmit, and it passes the token on when finished. That is how the topology avoids collisions without any contention.
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What is an interconnected collection of piconet called ?
Answer: A
Correct answer: scatternet
Several Bluetooth piconets linked through devices that belong to more than one of them form a scatternet. The other two words are not terms in use.
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Modems are configured in such a manner that any incoming calls are automatically answered. Manufacturer provides inbuilt modems in many user computers. In this case the greatest security risk when dealing with the modems is
Answer: B
Correct answer: Remote access without the knowledge of network administrator
A modem set to answer automatically gives anyone who dials it a way into the machine, and through it into the network, that bypasses the firewall and every other perimeter control. Because it is inside the network and unrecorded, the administrator has no way of knowing the door exists.
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The first network that has planted the seeds of internet was
Answer: A
Correct answer: ARPANET
ARPANET, built for the US Defense Department's Advanced Research Projects Agency from 1969, was the first packet-switched network and the direct ancestor of the internet. NSFNET came later and carried the traffic once ARPANET was retired.
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To update a formula in a table, press the
Answer: A
Correct answer: F9 keys
F9 updates the selected field, and a formula in a table is a field, so pressing F9 recalculates it. Alt + F9 shows or hides field codes instead.
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Typical data transfer rate in LAN are of the order of
Answer: C
Correct answer: mega bits per second
LAN rates are quoted in megabits per second - 10, 100 and 1000 Mbps for the successive generations of Ethernet. Kilobit rates belong to modems and terabit rates to backbone trunks.
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What is the function of a DNS server?
Answer: B
Correct answer: It translates domain names into IP addresses
The Domain Name System translates human-readable names such as example.com into the numeric IP addresses machines actually use. It is often described as the telephone directory of the internet. The lookup is hierarchical and distributed. A resolver asks a root server, which directs it to the server for the top-level domain, which directs it to the authoritative server for that domain, which returns the address. Results are cached at every step with a time-to-live, which is why a DNS change takes time to propagate. The distractors describe neighbouring services. A proxy or cache stores pages for faster access. DHCP assigns IP addresses to devices joining a network. A mail filter handles spam. Because DNS was designed without security, DNSSEC was added to sign responses, and DNS over HTTPS now encrypts the queries themselves.
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What is the smallest and largest font size available in Font Size tool on formatting toolbar?
Answer: A
Correct answer: 8 and 72
The Font Size box lists sizes from 8 to 72 points. Larger and smaller sizes can be typed into the box, but those are the values the list offers.
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The concept of sending extra bits for use in error detection is called
Answer: D
Correct answer: Redundancy
Error detection works by sending more bits than the message strictly needs, so that a corrupted message no longer fits the pattern. That surplus is called redundancy, and parity bits, checksums and CRCs are all ways of adding it.
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