Digital News and Review

Archive for September, 2009

Programming languages such as C++, BASIC, and Pascal were produced as general function languages, which means that you can use them to write a flight simulator, an accounting program, a voice identification program, or a word processor.

One of the most common uses for computers, however, is storing and recalling information, such as names, addresses, telephone numbers, prison records, credit history, and past job experience. Calculators store such data in a database. Almost every business relies on databases to store info about clients, inventories, and employees, so nearly every company uses a database program.

Unluckily, most people don’t want to know the strange and often freaky commands necessary to store, retrieve, or print info from a database. To make databases easier to use, most databases include a programming specific language. If you publish programs using a database’s programming language, you can produce custom databases for various companies. Best of all, database programming languages enable you to create customized databases much faster than using a generic purpose language such as C++ or BASIC.

If you use a database programming language, you write instructions only to falsify the database info. If you use a general function language such as C+, you must write commands to store info and then write supplementary instructions to manipulate that info, fundamentally doubling the quantity of work to execute the same task.

Database programming languages can fulfill the next specific functions:

-If you are composing a software that stores vast chunks of information, you can write a programme much faster by using a database programming language than by using a general function language such as C++ or Pascal.

-Database programming is a profitable field. If you know how to create personalized databases, you virtually never need to worry about being jobless or not making enough money.

A new address type made specifically for IPҢ is called the Anycast Address. These IPҢ addresses are global addresses, these addresses can be assigned to more than one interface unlike a IpҢ unicast address. Anycast is designed to send a packet to the nearest interface that is apart of that anycast group.

The sender creates a packet and forwards the packet to the anycast address as the destination address which goes to the nearest router. The nearest router or interface is found by using the metric of a routing protocol currently running on the network. However in a LAN setting the nearest interface is found depending on the order the neighbors were learned. The anycast packet in a LAN setting forwards the packet to the neighbor it learned about first. Anycast was first proposed in 1993 but even to this data there isn’t much usage as of yet. There are actually only a few anycast addresses currently assigned!

The source sending the anycast packet can use the address to control the paths that traffic flows. For example, when a customer has multiple connections to multiple IP’s using BGP. The customer can create a different anycast address for each ISP, and then configure the same address on the closest router to that specific ISP. Therefore the routers along the source′s path to the ISP can determine the shortest route based on the IPҢ anycast address. Which then forwards the packet based on the routers closest anycast address link. Another example would be on a LAN link. All the routers on the same LAN can have the same IPҢ address so that distant devices only need to identify the anycast address.

If you are going to hook up your computer to the internet without having any up to date internet security software in place, be aware that you could get compromised before you can even blink your eye.

It is highly recommended to at least have a working anti-virus program installed before going online.

If you don’t take this precaution, your computer will be very vulnerable to infection. Your computer, being a security risk, also means that you put other people at risk by spreading viruses or other malware from your infected computer.

Essential computer internet security software

1. Anti-virus program
2. Anti-spyware/malware program
3. Firewall

Viruses have been around since the dawn of the internet and come in different flavors.A virus replicates itself and once it is activated starts wreaking havoc, like erasing files or in the worst case scenario preventing your computer from starting up.

These days most anti-virus software will provide both virus and spyware protection.

Keep in mind that a dedicated anti-spyware program will generally do a much better job of protecting you from spyware than a standalone antivirus program. A combination of both programs will provide a more complete protection against the wide range of malware threats on the internet. They are similar, but complimentary programs. All commercial anti-virus programs also come with an e-mail scanner,

Last but not least, you should have a firewall in place.

A software firewall usually means the difference between an anti-virus program and an internet security suite. The latter always comes with a bundled firewall. The firewall monitors and controls which applications are allowed to get access to the internet and vice versa. The danger of a software firewall is that it can be quite confusing to configure for the average PC user. That is why a router,a hardware firewall, is preferable to a software firewall.

The above is the basic internet security software everyone should be using while going online. All the programs are available in their free or commercial versions.