Computer World. Матросова Т.А. - 25 стр.

UptoLike

ВУЗ: 

УлГТУ | Ульяновск

Составители: 

Рубрика: 

24
program out. If you find it difficult to use or understand, consider a trip to the local
software store to find a better program. You can spend several hundred dollars on a
communications program, but unless you have very specialized needs, this will be a
waste of money, as there are a host of excellent programs available for around $100
or sometimes even less. Among the basic features you want to look for are a choice
of different «protocols» (more on them in a bit) for transferring files to and from the
Net and the ability to write «script» or «command» files that let you automate such
steps as logging into a host system.
When you buy a modem and the software, ask the dealer how to install and use
them. Try out the software if you can. If the dealer can't help you, find another dealer.
You'll not only save yourself a lot of frustration, you'll also have practiced the second
Net Commandment: «Ask. People Know».
To fully take advantage of the Net, you must spend a few minutes going over the
manuals or documentation that comes with your software. There are a few things you
should pay special attention to: uploading and downloading; screen capturing
(sometimes called «screen dumping»); logging; how to change protocols; and
terminal emulation. It is also essential to know how to convert a file created with our
word processing program into «ASCII» or «text» format, which will let you share
your thoughts with others across the Net.
Uploading is the process of sending a file from your computer to a system on the
Net. Downloading is retrieving a file from somewhere on the Net to your computer.
In general, things in cyberspace go «up» to the Net and «down» to you.
Chances are your software will come with a choice of several «protocols» to use
for these transfers. These protocols are systems designed to ensure that line noise or
static does not cause errors that could ruin whatever information you are trying to
transfer. Essentially, when using a protocol, you are transferring a file in a series of
pieces. After each piece is sent or received, your computer and the Net system
compare it. If the two pieces don't match exactly, they transfer it again, until they
agree that the information they both have is identical. If, after several tries, the
information just doesn't make it across, you'll either get an error message or your
screen w ill freeze. In that case, try it again. If, after five tries, you are still s tymied,
something is wrong with a) the file; b) the telephone line; c) the system you're
connected to; or d) you own computer.
From time to time, you w ill like ly see mes sages on the Net that you w ant to s ave
for later viewing – a recipe, a particularly witty remark, something you want to write
your Congressman about, whatever. This is where screen capturing and logging come
in.
When you tell your communications software to capture a screen, it opens a file
in your computer (usually in the same directory or folder used by the software) and
«dumps» an image of whatever happens to be on your screen at the time.
Logging works a bit differently. When you issue a logging command, you tell
the software to open a file (again, usually in the same directory or folder as used by
the software) and then give it a name. Then, until you turn off the logging command,
everything that scrolls on your screen is copied into that file, sort of like recording on

Страницы