IT行业英语01_03_Scripts_080915.doc

Dictation Scripts: Unit 3 Computer SecurityPart 1: Listening1. Choose the Proper Words or ExpressionsListen to a short passage. Pick out the underlined words or expressions which are the closest to what you have heard.Lets face the facts here, people. The world has become a pretty scary place. In the salad days of your youth, all you had to worry about was the health, well-being of your family and locking your doors at night. Not anymore. Today, you need to worry about security in a whole different arena: Your PC. Spy-ware, adware, viruses and Trojans are lurking online, waiting to infest your computer. All could easily cripple your PC if youre not careful. Worse yet, hackers could steal important personal information. If thats not enough to send you hiding under the covers, you also have to find a way to keep your kids safe online. Scary? You bet. Unmanageable? Not at all. Pull the covers off you head and listen to us. Our super security guide will help you wise up and stay safe.2. Answer the QuestionsListen to a short passage. Try your best to understand the lines and answer the following questions.A computer virus is a computer program that can copy itself and infect a computer. The original may modify the copies or the copies may modify themselves. A virus can only spread from one computer to another when its host is taken to the uninfected computer, for instance by a user sending it over a network or carrying it on a removable medium such as a floppy disk, CD, USB drive or by the Internet. Viruses are sometimes confused with computer worms and Trojan horses. A worm, however, can spread itself to other computers without needing to be transferred as part of a host. A Trojan horse is a file that appears harmless until executed. In contrast to viruses, Trojan horses do not insert their code into other computer files.Many personal computers are now connected to the Internet and to local area networks, facilitating the spread of malicious code. Todays viruses may also take advantage of network services such as the World Wide Web, e-mail, and file sharing systems to spread, blurring the line between viruses and worms.Questions:1 What is a computer virus?2 How does a computer virus spread?3 Please list the removable media that can carry computer viruses.4 What are the differences between a computer virus, a worm and a Trojan?3 DictationListen to the following two short passages and fill in the blanks with the words you have heard.3.1 How to choose a secure password? Choosing a secure password is a matter of creating unlikely letter and number combinations. The more obscure your password, the tougher it will be to crack. Many passwords nowadays are being hacked usually due to inability of its owners to create them properly. If you will responsibly create your password and follow a few simple tips, the chances that it will be cracked will drop dramatically. Here are a few tips on how to create a password that will be a lot harder to crack: Avoid first names and surnames. Avoid things that might be easily associated with you like your hobbies, phone numbers etc. Avoid common words in any language whether it be English or Chinese. Use a combination of letters and numbers. Try to mix them. Create a password that you can remember so that you will not have to write it anywhere. Make your password long. The longer, the better. Do not use keyboard sequences like “qwertyu” for example. Plan on changing your password from time to time.Do not use the same password for everything. If someone finds this password, they would have access to everything. At the very least, make at least one password for sensitive things (i.e. online banking, etc.) and one for everything else (AIM, email, etc.).3.2 Gmails antivirus scanningGmail automatically scans every attachment when its delivered to your account, and again each time you open a message. Attachments you send are also scanned. Checking attachments for viruses protects our users and their information, and prevents the spread of viruses. If a virus is found in an attachment youve received, the system will attempt to clean the file, so you can still access the information it contains. If the virus cant be removed from the file, you wont be able to download it. If the system is unable to scan certain files, youll see an error message. Youll have the option to try again later or to download at your own risk. Please note that if your mail account cant scan the contents of the file, we cant guarantee that its safe to view. If an attachment youre trying to send is infected with a virus, your mail account will display an error message to tell you, but it wont clean the file. To send the message without that attachment, click the link in that error message that says Remove attachment and send.If your mail account detects that youre trying to send an infected attachment, we suggest running your anti-virus software in case your hard drive is infected. If you dont have anti-virus software, you might consider purchasing and installing one of the popular applications so you can protect your computer and information from viruses.4 Operate and RetellListen to the following instructions on How to schedule Automatic Updates to Virus Definitions in Symantec Antivirus and do the operations on your own computer according to what youve heard. Try to retell the whole process after the operation.Symantec AntiVirus can protect your computer from destructive programs known as viruses and Trojan horses, and can also protect against malicious software. The following steps will schedule Automatic Updates to Virus Definitions:1) Click on Start Programs Symantec Client Security Symantec AntiVirus. (Or, right click the gold shield in the system tray and click Open Sym