What term is often used for an email account that includes a storage area?
Answer: C
Correct answer: Mailbox
A mailbox is the account together with the storage that holds its messages. An IP address identifies a machine and an attachment is a file carried with a message.
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Which of the following is not a network device?
Answer: C
Correct answer: Modem
Routers, switches and bridges all forward traffic between hosts or segments within a network. A modem converts between digital and analogue signals so that data can cross a telephone line; it adapts the signal rather than making forwarding decisions, which is why it is not counted among the network devices proper.
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Every node on the network is connected through a central device is called _____ topology.
Answer: C
Correct answer: Star
In a star topology every node has its own link to a central hub or switch, so all traffic passes through that centre. That makes cabling simple and one node's failure harmless, at the cost of depending entirely on the central device.
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Which of the following are unique characteristics of half-duplex Ethernet when compared to full-duplex Ethernet?
1. Half-duplex Ethernet operates in a shared collision domain.
2. Half-duplex Ethernet operates in a private collision domain.
3. Half-duplex Ethernet has higher effective throughput.
4. Half-duplex Ethernet has lower effective throughput.
Answer: C
Correct answer: 1 and 4
Half-duplex Ethernet cannot send and receive at once, so every station shares one collision domain and must use CSMA/CD to detect and recover from collisions. Full duplex has a separate path each way, so collisions cannot occur and collision detection is switched off.
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Which of the following topologies is not of broadcast type?
Answer: B
Correct answer: Star
In bus and ring topologies a signal reaches every station, so both are broadcast arrangements. In a star the central device receives each transmission and passes it on only where it is needed, so it is not inherently broadcast.
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_____________ is a search engine
Answer: B
Correct answer: Google
Google is a search engine; Internet Explorer and Firefox are browsers, which are how a search engine is reached, and Flash was a plug-in for animation.
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Which one of the following describes the contents of the message when sending an email?
Answer: B
Correct answer: Subject
The subject line describes what the message is about. To, Cc and Bcc all name recipients rather than content.
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Fourth layer of OSI reference model is
Answer: D
Correct answer: Transport layer
The OSI layers in order are physical, data link, network, transport, session, presentation and application. The fourth is therefore the transport layer.
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What is the term for the set of rules and regulations while working on internet?
Answer: C
Correct answer: Protocol
A protocol is the set of rules governing how data is exchanged. The internet and the web are what those rules are used to build.
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_______ is example of Full duplex
Answer: D
Correct answer: Telephone
A telephone carries speech in both directions at the same time, which is full duplex. A walkie-talkie is half duplex - only one party may speak at a time - and a keyboard or monitor is simplex.
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