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Lingua inglese

1. ________ A collection of computers, display terminals, printers, and other devices linked either by physical or wireless means
2. ________ A generic name given to all devices linked to a network
3. ________ A network using the same technology as the Internet. Being private it can only be accessed by authorized people.
4. ________ A network in between an intranet and the Internet. It is private but it permits various degrees of access.
5. ________ A network which is confined to a small area, usually within a single building.
6. ________ A network which is not confined to one building. The computers and terminals forming part of the network can be spread around the world.
7. ________ A network which is the interconnection of information technology devices within the range of an individual person, typically within a range of 10 metres.
8. ________ A private network which is constructed within a public network infrastructure such as the Internet.
PosizionamentoPosizionamento
3

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
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Lingua inglese

"Computers are in connection in an office or a university campus." What type of network are we speaking about?
A: LAN
B: MAN
C: WAN
D: extranet
E: intranet
Scelta multiplaScelta multipla
2

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

This network connects distant equipment across the country or internationally.
A: LAN
B: MAN
C: WAN
D: extranet
E: intranet
Scelta multiplaScelta multipla
2

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

This network consists of many local area networks linked together.
A: LAN
B: MAN
C: WAN
D: extranet
E: intranet
Scelta multiplaScelta multipla
2

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

It is a private network and is often protected with a firewall:
A: LAN
B: MAN
C: WAN
D: extranet
E: intranet
Scelta multiplaScelta multipla
2

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

This network operates within a range of 10 metres.
A: LAN
B: WAN
C: SAN
D: PAN
E: MAN
Scelta multiplaScelta multipla
2

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

Bus topology:
A: simply consists of two computers connected together
B: is composed of a single link connected to many computers
C: connects many computers to a common hub computer
D: uses multiple links to form a circle of computers
Scelta multiplaScelta multipla
2

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

In this topology devices are connected with many interconnections between network nodes.
A: hierarchical
B: broadcast
C: mesh
D: extended star
Scelta multiplaScelta multipla
2

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

"All computers on this connection receive all signals transmitted by any attached computer."  Which topology does this sentence refer to?
A: tree
B: star
C: ring
D: bus
Scelta multiplaScelta multipla
2

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

"Each link carries information in one direction. Information moves around the ________ in sequence from its source to its destination."  What is the missing word?
A: tree
B: star
C: ring
D: bus
Scelta multiplaScelta multipla
2

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

This topology is used in the telephone system.
A: tree
B: star
C: ring
D: bus
Scelta multiplaScelta multipla
2

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

The human need to communicate – to connect with others – has motivated humanity's creativity from the most ancient times throughout history. In prehistoric times, people drew pictures on the walls of their caves, primitive peoples used smoke signals and drum rhythms, American pioneers developed the Pony Express and Alexander Graham Bell invented the telephone.
Today we use visual images and electronic pulses, but the need for one human being to connect and pass ________ to another continues on. In fact, technology has been developed to increase ________. There is no doubt that we can today share more information more quickly than ever before by using computer ________.
A few mouse clicks and people can pay bills with a credit card, plan and book holiday travel, send messages, participate in discussions or buy anything from flowers to houses.
College students can attend ________ courses and get their credits via computer. Of course, the biggest use of networks is in business. Corporate networks keep vital sales, manufacturing, and market information within reach of companies and managers who need to make decisions in a fast-paced and competitive ________.
With the Internet and the World Wide Web ________ communication has reached a new plateau. They are growing rapidly and are at the centre of a communication ________. As more and more ________ are added, and more and more services are accessible, we move inexorably closer to the time predicted by John F. Akers, when he was president of IBM, a time when "everything is connected to everything".
PosizionamentoPosizionamento
3

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

1. ________ Wireless communication used to connect keyboards and mice.
2. ________ Connections between computers and other electronic devices.
3. ________ Electronic signal that is continuously changing.
4. ________ Indicates the number of times a signal on a channel changes per second.
5. ________ Method of transmission that sends information more quickly and is more expensive.
6. ________ Data movement that can go in only one direction at a time, such as that used by a fax machine.
7. ________ Digital phone service offering high-speed transmissions over ordinary phone lines.
8. ________ Indicates the number of bits per second that can be sent over a link.
9. ________ The most common type of telephone connections.
10. ________ Transmits data in one direction (from the network) faster than it does in the other direction (to the network).
PosizionamentoPosizionamento
3

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

Decide if the statements are true or false.
A: The earliest form of long-distance communication was the telegraph.
B: Network links use only one type of physical media to connect computers and other electronic devices.
C: Fibre-optic cables can carry more signals than either twisted-pair or coaxial cable.
D: Radio frequencies are not commonly used as wireless communication between computers because of the fear of other devices causing interference.
E: The properties of communication signals do not vary among the differing communication links
F: A modem is necessary to send information from one computer to another computer over current telephone lines.
G: A network only accounts for those computers that are directly connected by physical means.
H: Simplex transmission is one-way communication of data. It is usually used for displaying information.
I: Asynchronous transmission is when data are sent byte by byte without regard to how much time passes between bytes.
J: Bits per second is the same as baud rate.
Vero o falsoVero o falso
2

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

The Maturing of  the Client/Server Model

The client/server model is one of the foundation concepts of networks.  A client ________ some data from a server, which ________ to the request. This model ________ several computer users to share files on demand over networks. Over the years, the model ________ from the mainframe and minicomputer environments, where data ________ in large computers that served them to terminals that had no computing power of their own.

The client/server model's second stage ________ possible by the personal computer. Almost all the computing ________ on the client PC using data and application files served over LANs. A major disadvantage of this approach is that the network has to ________ a very large amount of data from which the client PC distils the required information. A request from the server for a product number, for example, ________ the complete catalogue of products to be transferred to the PC, where the PC programme ________ for the product number. This ________ to a network overloaded with data traffic, most of which isn't used.

The third variation has a more sophisticated division of labour that ________ the data traffic over the network, yet ________ the centralisation of the data as in the early mainframe model. In this case the server will respond to the client's request for data, but ________ some processing to eliminate irrelevant data that the client doesn't need. Suppose there is a request for employee salaries, for example. Instead of sending all employee records with other information such as phone numbers, addresses, and other items, the server ________ just the salary data and send them alone. This would be just a fraction of the data otherwise sent to the client. The client PC computing power would then be used to display data and maybe do some analysis , such as calculating average salaries.
PosizionamentoPosizionamento
3

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

2010 space odyssey: Brisbane maps robotic future

1. University of Queensland scientists are working on algorithms to help robots rapidly 'learn' about their environment. Scientists in Brisbane are creating a new generation of robot "helpers" more in harmony with human needs similar to 2001: A Space Odyssey's HAL. ________

2. UQ's School of Information Technology and Electrical Engineering head, Professor Janet Wiles, said :"You're bringing together neuroscience, cognitive science, psychology, behaviour and robotics information system. We're doing a combination of science and technology and that's one of the great benefits of our project." The group aims to advance robotic technology by decoding the way human and animal brains work to equip machines with the ability to operate in the real world. ________

3. Over the next two decades, Professor Wiles sees robots becoming more and more important, expanding from their current roles as cleaners and assemblers into smarter machines more closely integrated with human beings in the form of replacement limbs and joints. "It's not going to be the robots and us. Already a lot of people are incorporating robot components; people who have had a leg amputated who now have a knee which is effectively a fully-articulated robotic knee very similar to a natural knee," Professor Wiles said. ________


PosizionamentoPosizionamento
3

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

4. At UQ, the team is working on developing computer codes or algorithms that would enable a robot to "learn" rapidly about its near environment and navigate within it. "Navigation is quite an intriguing skill. The kind of navigation we are dealing with is how you get from one place to another, right across town or from one room in a building to another you can't see." With about four million robots in households right now, performing boring tasks such as vacuuming the carpet, improvements in navigation has the potential to widen the scope of these creations to take a larger place in everyday life. ________

5. According to Professor Wiles, the ability to rapidly process information and apply it to the area they are working in will give robots the edge into the future.  "Robots need to learn new environments very rapidly and that's what a lot of our work focuses on.
When you take a robot out of the box you don't want to program into it with the architecture of your house, you want the robot to explore the house and learn it very quickly," Professor Wiles said. "Household robotics is going to be really big in the next 15 years or so and one of the things you need is for robots to be able to look after themselves in space." ________

6. But as Australian universities and international research institutes look into replicating the individual parts of biological creatures and mimic them in machines, the question of intelligence inevitably become more important. Professor Wiles believes that some day machines will think like us.  
"There's strong AI (artificial intelligence) and weak AI. Strong AI says there will be artificially intelligent creatures which are not biological. Weak AI says they will have a lot of the algorithms and they do already have a lot of those algorithms," she said. "The bee, whose brain is as tiny as a sesame seed, already has better navigation abilities than even our best robots. So we have a little way to go before robots reach biological intelligence let alone human intelligence but I don't see why we shouldn't take steps towards it." ________
PosizionamentoPosizionamento
3

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza

Lingua inglese

Networking and communications is one of the most important aspects in nowadays life. Every person 1.________ any other person in any part of the world with seconds. With networking and communications, life 2.________ much easier and progress is much faster. With telephones and mobile phones, each person 3.________ individually. Nowadays it is possible to communicate with a group of people in a group by mobile phones.
Networking is a set of computers or devices that 4. ________ to each other so that they can exchange data. Internet, intranet, and extranet are three types of networking. Examples of different networks are Local area network (LAN), Wide area network (WAN), and Wireless LANs and WANs (WLAN & WWAN).
Local area network is a small network given to a small geographic area. Wide area network 5.________ a large geographic area. Wireless LANs and WANs cover both LANs and WANs.
The possible media that network can pass through are twisted-pair copper wire cable, coaxial cable, optical fibre, power lines, and other different wireless technologies.
Networking is the main reason of having different kinds of communication devices. However, you can have networking without communication.
Some programs that 6.________  both networking and communication are Messenger, Skype, and Pal talk. There are many other types but these are some of the most famous that are released 7.________ with individual people or groups.
Nowadays, people who 8.________ internet and mobile phones are considered isolated from the rest of the world. Because with those two devices you 9.________  whoever you want without taking the load of reaching the other person physically. Now it is so easy to reach any part of the world, if it is so, what is the future of networking? 10.________ to phone someone on the moon from a mobile phone? The future remains mystery.
Completamento chiusoCompletamento chiuso
4

Il punteggio di un esercizio è determinato
dalla difficoltà: da 1 (più facile) a 5 (più
difficile).Vuoi saperne di più? Consulta il
Centro Assistenza