A small single site network is nothing but a
Answer: D
Correct answer: LAN
A network confined to a single site is a local area network. A MAN covers a city, DSL is an access technology and RAM is memory.
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When static packet filter is used on the router then the statement which is not correct for firewall protection is
Answer: B
Correct answer: Static packet filtering is more secure than dynamic packet filtering
Static filtering judges each packet on its headers alone, with no memory of what has gone before. Stateful and dynamic filtering track connections and so can tell a legitimate reply from an unsolicited packet, which makes them the more secure of the two - so the statement claiming the reverse is the one that does not hold.
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The benefit of using a firewall for LAN is
Answer: C
Correct answer: Both 1 and 2
A firewall does both: it blocks traffic that should not reach the network at all, and it applies rules deciding which of the permitted traffic may reach which internal resources.
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What does the protocol TCP guarantee that UDP does not ?
Answer: C
Correct answer: Reliable, ordered delivery of data
TCP numbers its segments, acknowledges them and retransmits anything lost, so the receiver sees the bytes in the order sent. UDP omits all of that, which is why it is preferred for live video and voice where a late packet is worse than a missing one.
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________ is one of the examples of guided media
Answer: C
Correct answer: Coaxial Cable
Guided media confine the signal to a physical path: twisted pair, coaxial cable and optical fibre. Unguided media - radio, microwave, infrared - let it travel through free space.
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The statement that holds true regarding firewall is
Answer: D
Correct answer: All of the above
All three are true of a firewall: it may be implemented in hardware or in software, it examines the traffic crossing a boundary, and what it does with each packet is decided by a configured set of rules.
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A technique that reduce the size of saved file by elimination or encoding redundancies is called
Answer: C
Correct answer: Compression
Compression reduces a file's size by removing or re-encoding repetition. It is lossless when the original can be restored exactly and lossy when some detail is discarded for a greater saving.
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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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