Basics Of A Router

Basics Of A Router

Router is a computer device that receives or forwards data packets to and from the Internet towards a destination in the process called routing. Router is the essential component of the computer networking that enables any sent data to arrive at the right destination.

As an illustration, imagine that the Internet is the world and one computer is one household. Other computers connected through the Internet are households around the world. Say one household will send a letter to another household in any part of the world. The letter has an address right? And that address would determine the destination of the letter. But without one reading the address, the letter would not arrive to the right receiver. The letter also would not be able to reach the intended receiver if there is not medium. This medium would be the courier. And the courier of the computer data is the router.

A router (broadband router) is also a device that enables two or more computer to receive data packets from the Internet under one IP address at the same time.

Remember that to be able to connect to the Internet, a computer must have an IP address unique from the rest of the computers. Therefore, every computer connected to the Internet has it own IP address. It is like having a fingerprint or ID as an access pass to be able to enter the web. With the presence of the router, this “fingerprint” or “ID” could be shared by two or more computer at the same time.

In simplest form, a router makes two or more computer use the Internet at the same with one access pass.

One more thing: a computer with cable modem could also be considered as a router. In this, the computer would do the process of routing like normal routers do. Other computers are then connected to the computer with Internet connection that would give it with the Internet connection. The computer with cable modem has the direct contact with the Internet and the ones connected to it are sharing the connection.

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Why would anyone need a router?

For households with two or more computers who would want to have Internet connection to every computers they have, taking subscription for each would be too much. The solution is to buy a router that would enable every computer in the house to have an Internet connection. In the definition above, the broadband router would act as a hub to the existing Internet connection.

If the router is comparable to a hub, would it affect the Internet speed?

It should be taken into consideration that once a single Internet connection is divided, the connection speed is affected. But there are some broadband routers that would bring minimal slowdown to the Internet speed and the effect might not even be big.

Internet speed would also depend on the type of application used in a router. While some would inflict little effect on the speed like online games, others would terribly slowdown your connection and even hinder you to use the Internet at all.

Usually, offices use a more sophisticated router to redirect Internet connections to the large number of computers. These routers would give better data packeting compared to a typical router used at home that results to faster Internet speed.

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Building A PC

Building A PC

Many people simply go to the retail store and get sold to when it comes to computing equipment. You would be very surprised how easily you can pick up all the core components and assemble yourself or get a friend or family member in the know to do it for you. All the top brand PC manufacturers such as IBM, HP and Fujitsu Siemens offer you pre built PC’s, Dell on the other hand will take your order and build to your own style. Off them all Dell will come across more flexible with the specification, however, building your own will not only save you many dollars but make you aware of just how much profit these guys are making.

What are the core components of a PC?

Well let’s start with the basics you will need no matter how high or low spec you want the computer:

PC Case – Motherboard – Processor Chip – Fan – Power Supply – Hard Disk Drive – Memory (RAM) – Power Cord – Keyboard & Mouse – Graphics Card (may come on the motherboard) – Sound Card (if you require one). All these components will get you started. Remember build the PC to your own needs. Gaming PC’s generally need a good graphics card with 3d capabilities while general office PC’s do not need such powerful cards.

Processors:

Intel and AMD are the key players when it comes to processors, Intel offer the Pentium chip or Celeron while AMD have their range such as the AMD Athlon and Sempron. While both companies have their benefits Intel’s being that they are the largest selling globally but AMD seem to have the faster processing capabilities. When looking at the processors think sensibly and ask yourself do you really need the latest and greatest or would you notice the difference in point two of a processor e.g. 3GHz compared to 2.8GHz.

Remember keep the cost down, basic components such as the PC case comes in a number of different styles such as Mini Tower, Desktop. Choose what suits you. RAM (memory) will depend on what you plan to do, some games and simulators require large amounts of memory so check before you buy, and the graphics card will also depend on your PC plans. If you are generally using the PC for home and Internet browsing remember to purchase a modem or if you are planning broadband arrange with the installer and get yourself on the waiting list.

More information about building the perfect PC here...

Building the PC

Building a PC is not as daunting as it seems. If you have not attempted to do this before it is a good idea to have supervision. Some of the components such as the memory need careful handling due to static electricity. Get an anti static wrist strap to protect the components, they cost very little and could save you a lot of money. There are plenty of cheap books out there to guide you in assembly but you will also find free articles online with diagrams for assembly.

Software:

Hardware is one thing but you also need the software such as the operating system and anti virus software for protection against viruses. Depending on what you want and what you are used to using before you can get free operating system such as Linux. Most of us are used to Microsoft Windows but you will require a licence to use this software. You may also need some office software such as Microsoft Office XP or 2003 standard or Professional edition. The anti virus software is essential and Norton’s or McAfee are some of the better known brands. There are also free downloads that will help protect your PC such as Stinger and Ad-Ware.

In Brief:

Building your very own PC gives you the flexibility that most manufacturers do not. The price is greatly reduced if you can assemble yourself and it will give you a great insight to all the components and key terms in computing. You will be surprised to find that not all is as technical as first seems.

Some quick notes: Do not forget the following: Modem – Make sure you also have enough USB ports for external devices such as a printer or digital camera. Always back your files up such externally on the off chance you have a problem with the Hard Disk Drive and your files are not transferable, something like a usb keyring would be ideal.

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7 Great Computer User Tips - For Windows® Users

7 Great Computer User Tips - For Windows® Users

If you’re using the NTFS filing protocol on your system, instead of FAT32, you can get a bit more speed by disabling Windows® Indexing. The downside to this is that searching your drive for a specific file might take a moment or two longer, but everything else should run faster.

To disable this feature open My Computer and then right click on the drive you wish to reset – usually C-drive. Now click on Properties and then uncheck “Allow Indexing Service.” It will take Windows® a few moments to accomplish this task, based on your processor speed. If you have other hard drives, perform the same process for them. After this is done, it’s a good idea to empty the Recycle Bin and then Defragment your hard drive(s).

FREE Software

If you have a system and it does not have an office suite, such as Microsoft Office, and you don’t want to pay several hundred dollars to have one, try Open Office. This is a great alternative to other suites, and it’s free! Simply direct your browser to www.openoffice.org and follow the instructions for downloading and installation. Make no mistake, this free office suite is an extremely powerful set of software tools – easily a match for any competitor.

Internet Explorer (Microsoft’s Internet browser) is unarguably the standard in computers. This is why hackers develop so many malware applications to invade it. If you use a different browser, you have much less chance of an invasion by malicious software. There is a great alternative available, and it’s free. You can download a copy of Firefox at www.mozilla.org/products/firefox. You can even move your Internet Explorer settings into Firefox automatically – so you don’t lose your Favorites, etc.

Laptop Printer Fix

If you’re using a laptop that is running Windows® ME, and you’re having trouble printing through the USB, try this simple fix. Go to the website for the company that manufactures your printer. If you use a Hewlett-Packard, for example, go to www.HP.com and download the appropriate drivers and install them. ME has drivers that recognize the USB printer is present and attached, but not the drivers needed to make it print. Which drivers you download and install will be dependant on your printer. After installing new drivers, update the printer as necessary in the Control Panel.

Save $$$ When Shopping On-line

If you’re making a purchase on-line, and you know the item you want to buy, you can easily compare pricing all across the Internet. This can amount to a very substantial savings.

At this writing, I went to www.mysimon.com and typed in that I wanted to buy a printer: a Canon PIXMA iP4000. The service instantly checked the Internet and returned prices ranging from $62.00 up to $286.00. This kind of price spread is not at all unusual, especially for computers and electronics.

The My Simon website service only checks pricing, it does not provide a platform for purchasing anything, though it does link to such places. It also gives a rating for the sellers and other users’ input regarding their experiences with the company. You can order the results of the search for your product by price, so that you can quickly find the lowest price from the highest rated dealer.

Windows® XP Professional Only

A feature of Windows® XP Professional, that is not available in the Home Edition, is the ability to encrypt files. This encryption prevents others from opening the files in the folder you encrypt. To encrypt one or more a folders, follow these easy steps.

Click Start, then My Documents. Now locate the folder you wish to encrypt and right click on it and choose Properties.

On the General tab, click on Advanced. Put a tick mark in the box for Encrypt Contents to Secure Data. Click okay two times and the confirmation dialog box will appear allowing you to select the folder, the folder and all files, and/or the subfolders within it.

Now you'll be able to place files in this folder (or folders) and since they're encrypted, others will not be able to access them.

Internet Safety

You should never reveal your username or password to anyone who e-mails you and asks for it. This information is frequently asked for by an Internet scheme called “phishing.”

In a common phishing scam, you receive an e-mail that looks quite official. It usually appears to come from a bank or credit card company. A common title for these e-mails is “We need to verify your account information.” Another is “Please logon to your account and verify your settings.” If you do click where instructed, you’ll end up on a site that appears to be the real one. If you fill in the username and password for of your on-line banking account, you can expect serious problems within twenty-four hours.

If you believe that a company or business that you do on-line business with really does require your information, then simply contact them. This way, you will know where you are sending your information, and what it will be used for.

CD Burning Error Fix

Burning music, video, and data CDs has become quite popular over the past few years, and the evolution of the supporting technology has yielded hardware and software that is better than ever – and very reasonably priced. CDs offer a great place to store substantial amounts of data in a small, easily retained format. They also give us new control over aspects of our entertainment.

A relatively common error received during CD burning informs you that the CD cannot be burned, or that there was an error during burning. Of course, you could actually have a defective CD drive, but this is usually not the case.

If you receive a message indicating that your CD cannot be burned, go to the website of your CD drive manufacturer. Look for the list of CD types (manufacturers/numbers) that are compatible with your device. Most often, you’ll find that your CDs are not listed. The two types that seem to have the least difficulty being burned are manufactured by Sony and TDK. These cost a bit more, but they burn very reliably.

Along the same lines – H-P has introduced a new CD burner. This new burner requires the use of special CD blanks, but after you burn your data into the CD, you can flip it over and close the drive again. Then you can use the laser to burn a title for the CD directly onto the CD itself. It’s new technology, but perhaps it will catch on and we’ll see newer, better such devices in the near future.

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A Concise Guide To MICR And Associated Technologies

A Concise Guide To MICR And Associated Technologies

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Magnetic Ink Character Recognition (MICR) was developed to utilize the benefits of computer technology in the banking industry. Prior to the use of a MICR line, check sorting by account number was a manual process. Two systems were previously used to handle the large numbers of checks processed in the banking industry: Sort-A-Matic and Top Tab Key Sort.

The Sort-A-Matic system included 100 metal or leather dividers numbered 00 through 99. Each check was placed in the corresponding divider by the first two numbers of the account. The sorting process was then repeated for the next two digits of the account number, and so on. When the process was complete, the checks were grouped by account number.

Under the Top Tab Key Sort system, small holes punched at the top of the checks indicated the digits. For instance, the first hole indicated the value of the first digits (0, 1, 2, 3...) A metal "key" was inserted through the holes to separate all of the checks with the same value in the first digit, and this step was repeated for each digit until all the checks were sorted.

Both of these systems worked, but they were time-consuming. With the advent of the computer and its movement from the laboratory into the business world, a sorting and matching task seemed ideal. Stanford University and Bank of America were the first to successfully use computers to sort and match checks. They developed what is now known as MICR.
The Development of the MICR Font

The MICR font was developed by Stanford University in conjunction with Bank of America and approved by the American Banking Association. The font is known as the E-13B font. E-13B has a total of 14 characters: ten specially designed numbers (0 through 9) and four special symbols (Transit, Amount, On-Us, and Dash).

The letter E indicates the fifth version considered. The letter B indicates the second revision of that version. The number 13 is derived from the 0.013-inch module construction used for stroke and character width. This means that all character widths, both horizontal and vertical, are in multiples of 0.013 inches ranging from 0.052 to 0.091. The significance of this will be explained more thoroughly later in this article.
MICR Readers

Three types of machines are used to read MICR characters. The two that read the characters magnetically are referred to as MICR readers. The third machine is an Optical Character Recognition (OCR) reader.

E-13B characters are printed with toner containing iron oxide, which is capable of being magnetized. MICR readers transport the checks containing the E-13B magnetic characters past a magnet, thereby magnetizing the iron oxide particles. The magnetized characters then pass under a magnetic read head. The magnetic field (flux pattern) caused by the magnetized characters generates a current in the read head. The strength and timing of this current allows the reader to decipher the characters.

Magnetic readers come in two types: single track (single gap or split scan) and multiple track (matrix or pattern) readers.

Single-Track Reader Characteristics
Single track uses a read head with one gap to detect the magnetic flux pattern generated by the MICR character. When a magnetized E-13B printed character moves across the narrow gap of the read head, the electric voltage caused by the magnetic flux from the character generates a waveform unique to each character.

Multi-Track Reader Characteristics
The multiple track reader employs a matrix of tiny, vertically aligned read heads to detect the presence of the magnetic flux pattern. The small individual read heads slice across the character to detect the presence of magnetic flux. This sensing of magnetic flux over time produces a unique matrix pattern for each character.

An OCR reader does not use magnetic properties to detect the E-13B characters. Instead, it uses a scanner to detect the amount of light reflected from the character and the amount of light reflected from the background. A photocell column detects the presence of the dark area of a character.
Waveform Theory

The readers move and read documents from right to left. The right-hand edge of the character, as a result, is the first to cross the read head. Analysis of the signal level created by reading the character 0 will help explain this in greater detail.

As the character moves from right to left under the read head, the gap detects the magnetism of the first right-hand edge (edge 1). This results in the increase in magnetism and a positive peak is created (peak 1). As soon as the right-hand edge moves beyond the read head gap, no new magnetism is found, and thus the wave form returns to the zero signal level.

At the second edge, the vertical read head detects a drop in magnetism, which results in a -110 signal level at peak 2. Again the waveform returns to zero until the next portion of the inner ring of the character is detected. At this point (peak 3), an increase in magnetism (+110) is indicated. Finally, the outer portion of the character is read, resulting in a negative peak (peak 4) of -130.

The placement of the vertical edges must occur in increments of 0.013 inches from the first right-hand edge. There are five characters that have two positive and two negative peaks similar to the character 0 and also appear in a positive-negative-positive-negative format. They are 0, 2, 4, 5, and the transit character, which are differentiated from one another by the horizontal location of the peaks in the waveforms. The peaks do require different amplitudes, but ANSI standards allow them to vary from 50% to 200% of the nominal amplitudes (Canadian standards allow them to vary from 80% to 200% of the nominal amplitudes). This is why the placement of the waveform is so important and why the characters are shaped unusually.
What Affects the Signal Level?

Signal level can vary based on a number of factors. The amount of iron oxide (concentration) that is present in the character will affect the signal level. This is a function not only of the toner itself, but also of how it is laid on the paper and the pile height, which can be controlled by numerous other cartridge components (i.e., "hot" OPCs).

The taller the vertical edge of the character, the taller the peak (either positive or negative). A vertical edge that is not regular and/or not vertical will result in a reduction in the amplitude of the peak and will flatten the peak out.

Keys to proper waveform detection are:

* All peaks in a character's waveform must be detected. The reader sorter must know that the peak is there.

* The peak must be located at or near its anticipated location.

* No significant "extra" peaks can be present.

* There cannot be wide variations in the signal levels of peaks within a character.

What to Look for in MICR Printers and Consumables

Printers that are used for MICR printing must have a unique MICR font that is modified to suit the unique printer engine, and it must be modified to the pixel level to match the magnetic toner provided for that printer. This is essential to ensure the correct waveform, dimension, and signal strength when a check is printed with the correct MICR characters. In addition, the MICR font must meet ABA-X9 standards to ensure acceptance of your checks by banking institutions.

The magnetic MICR toner that you choose must be specifically designed for the particular print engine in the printer. Ensure the toner has been thoroughly tested for consistent signal readings, image permanence and uniformity, and excellent edge acuity. Toner coverage must be solid with no extraneous toner lay down.

OEM cartridges are always a safe (but more expensive) bet. If you buy a "compatible" brand, ensure it has a new OPC drum, new primary charge rollers (PCRs), a new black velvet magnetic sleeve, and new image wiper blades. The hopper system must be filled with high-quality, low-abrasion MICR toner.

The vendor you choose should use the latest and most advance MICR test equipment, such as a Verifier and Golden Qualifier to conform to ANSI X9 Standards. It is also recommended that the systems exceed U.S. and Canadian check printing standards.

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