Speaker A, B and C discuss this question.

XIX. Rewrite an extract from the journal article “Cyber Monday: Nine Tips for Shopping Online Safely” by Mark Clayton, staff writer in “The Science Monitor”. Use only reported speech.

How do you shop safely online and avoid becoming a victim of scams and malicious software?

“One key problem for online consumers: knowing which "unbelievable, this week only" deals are real and which are fake, considering all the crazy discounts out there”, Chester Wisniewski, an expert, wrote on the global cybersecurity firm’s blog.

“How can you tell the difference? Easy! Don't trust any of them,” he wrote.

“Lots of people are looking to make money off of the Christmas giftgiving bonanza and many of them are scammers,” Mr. Wisniewski said. “If you receive an email or online solicitation you are interested in, don't click any links, even though that may seem counterintuitive”.

“Surprisingly, the volume of e-mailed malicious spam has actually fallen.”, Wisniewski added.

“When you see a post on someone's wall or a tweet from a colleague, treat it the same as an unsolicited email,” he noted. “Don't click it. Go to the real source and if necessary contact the sender to confirm its veracity”.

Beyond that, here are some steps that the New York State Division of Homeland Security and Emergency Services (DHSES) and cybersecurity experts recommended:

Secure your computer and mobile devices;

Use mobile applications with caution;

Consider using a credit (not debit) card or an online payment system;

Don’t click on pop-up advertising;

Don’t use public computers or public wireless.

SPEAKING

XX. In small groups, perform the following tasks.

Explain how Bluetooth technology is used to connect and exchange information within communications systems. You may wish to consider devices such as mobile phones, laptops, video game consoles and personal computers.

Email is used regularly in business, both internally and externally. Explain how emails are sent across a network.

3. Communication systems have greatly changed the workplace. In relation to the following situation, briefly describe the changes to the nature of work that have taken place: While sitting on a train on the way to her office, a worker for an accounting firm uses a laptop to check her email.

Define virtual communities and discuss the impact they have had on social interactions.

Discuss the advantages and disadvantages of electronic mail.

Research the term e-crime and discuss one of the areas where this form of criminal activity is having an impact on communication systems.

Explain the similarities and differences between the Internet, intranets and extranets.

Define podcasts and list three areas where this technology is emerging as a popular form of digital communication.

WRITING

XXI. Link each set of sentences to make one sentence. You may omit, change or add words as required. Then form your sentences into two paragraphs to make a description of how the hybrid satellite communications system works(See Appendix 1).

1)

The hybrid satellite communications system provides communications.

The hybrid satellite communications system provides the Internet access, to computer users.

The hybrid satellite communications system includes a satellite system.

The hybrid satellite communications system includes a terrestrial communications system.

The satellite system includes two transceivers.

2)

The first transceiver receives and transmits the first set of signals.

The signals are received from the terrestrial communications system to a plurality of user units.

3)

The second transceiver receives a second set of signals in a second frequency band from the user units.

The second transceiver transmits those signals back to the terrestrial communications system.

4)

The first set of signals are relayed by a Direct Broadcast System (DBS) satellite in a frequency band between 12.2 GHz and 129 GHz.

The second set of signals are received and transmitted by a Mobile Satellite System (MSS) satellite operating between 1.0 GHz and 3.0 GHz.

5)

The present invention is capable of using the present communications infrastructure. The infrastructure is dedicated to the satellite transmission of television via DBS satellites.

The infrastructure is dedicated to satellite cellular communications via MSS satellites.

UNIT 8

REVISION

I. What do you know about satellites? Look at the picture and explain how the satellite in orbit operates.

Date: 2016-03-03; view: 841