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Zone Labs vs. Windows XP Service Pack 2 Firewall
by: John Lenaghan
Windows XP computer users fall into two categories: those who have personal firewall software and those who do not. Knowing that the majority of computer users go without a firewall, Microsoft has included an internet security firewall into the latest XP update called Service Pack 2. If you had no prior firewall, the day you download the SP2 update is a happy day for you.

If you already have a personal firewall such as Zone Labs, McAfee or Norton, then a question arises as to which one you keep, because any computer repair store geek would say you should not keep both the XP firewall or your existing software because it has the dynamic Microsoft name behind it, or go with a more niche company for security such as Zone Labs.

What is this Firewall Thing, Anyway?

First, what is a firewall? A personal firewall protects your computer from malicious users by blocking unauthorized access. Who needs a firewall? The term “firewall” gives the impression that only large companies need a “wall” of “fire” to block attacks. You probably feel your computer is too small to attract an attack. But let’s not forget that hackers are hackers because they are students of behavior! They know that millions of people think they’re not targets and forego internet security. They build viruses to seek out such vulnerable computers, which can lead to a multitude of computer problems, not to mention identify theft.

Perhaps if firewalls were renamed, “personal identity insurance,” more people would realize the need to own it! So, does the Windows firewall do the job? While it will block incoming attacks, it will not block programs already installed on your computer from sending information out.

Many downloads you agree to will have spyware attached, and spyware often “phones home” with information about the user. Windows XP firewall will not stop this which is why computer experts suggest that for maximum protection you should go with a full firewall protection like the ones offered by Zone Labs, Norton and McAfee in lieu of XP’s.

About the author:
John Lenaghan writes about solving computer problems for the Computer Help Squad website, where he provides valuable tips and advice about internet security, computer upgrades and other computer related topics.


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How SMS Works
 by: Jim Sherman

SMS, or Short Message Service, is the technology behind what we often refer to as ‘text messages’ or ‘SMSes’, as well as what allows for news alerts on cellular phones. In recent years SMS has ballooned to over a 50 billion dollar industry and is quickly taking the communications world by storm.

Short Message Service actually refers to a framework that uniquely allows computers, or in this case phones, to communicate with each other without the need of a central hub. With SMS, phones can find each other, send short packets of information back and forth, and do it all without any central computer to guide them. But because the system does not rely upon fixed lines like a land based telephone system does, the amount of information that can be sent at one time is limited in size. This depends on the language spoken, but for English letters this typically means around 150 characters (Chinese and Japanese letters are limited to 70).

Quite recently, however, new developments in the technology have allowed for even longer messages to be sent. Long or Concatenated SMS is a development that allows multiple messages to be combined to form a single message. In effect, what happens is that your phone actually sends out a few smaller messages and then the receiving phone simply compiles those messages so that for users on both ends, it appears as though the message were cohesive. While there are some limitations, the brilliance behind SMS is that because there is no need for central hubs, and thus the system can be expanded indefinitely without any concerns of it slowing down or becoming more expensive.

The most common form of SMS is ‘texting’. This usually takes place with a cellular phone in which individuals use the letters behind the number pad on their phone to spell out words and phrases and then send them out. Because many companies charge by the word, individuals have come up with a sort of ‘texting slang’ to cut down on the amount of words required to convey a particular message. For example, ‘gr8’ and ‘BTW’ mean ‘great’ and ‘by the way’. In addition, other words have just been shortened, such as ‘lata’ to mean ‘later’. Most users simply pick up the lingo through frequent use, and although some slang is widely understood and used, other shortcuts are developed within circles of friends and family.

The major advantage of SMS is its price. The price is typically $0.05 per message, a significant cut below that of traditional telephony and cell phone per-minute charges. The savings of SMS has its roots in the nature of the technology. Short Message Service, like SIP, is modeled on a peer to peer model and not a cog and wheel like traditional communication systems. This means that instead of having to route a message through a central hub, your text goes straight from you to its destination. This has radically cut down on the cost of SMS implementation and led to its overwhelming popularity throughout the world.

Short Message Service (SMS) has radically changed the face of the communications industry. While the practice has become quite common throughout the world, it has only recently become popular here in the United Stats, a growth partly predicated upon, surprisingly enough, its featured role in the show American Idol. The fact that ‘texting’ is quickly gaining both in popularity and recognition in the United States is not surprising however, due to its ability to offer users a cheap, quick, and often fun way to communicate with friends and family.


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