An SSL, or Secure Socket Layer, is technology that has been developed that allows web browsers and web servers to communicate over a secured connection.

The system uses cryptography that uses two keys to encrypt data  a public key known to everyone and a private or secret key known only to the recipient of the message. It’s a way to encrypt data, like credit cards numbers (as well other personally identifiable information), which prevents the "bad guys" from stealing your information for malicious intent.

The recently introduced SSL v3 improved upon SSL v2 by adding SHA-1 based ciphers, and support for certificate authentication. SSL v2 was known to be flawed in a variety of ways. Identical cryptographic keys are used for message authentication and encryption. The older version did not have any protection for the handshake, meaning a Man-in-the-middle downgrade attack could go undetected.

SSL has recently been succeeded by Transport Layer Security (TLS), which is based on SSL and is included as part of both the Microsoft and Netscape browsers and most Web server products. SSL uses the public-and-private key encryption system from RSA, which also includes the use of a digital certificate.

SSL-enabled client software can use standard techniques of public-key cryptography to check that a server's certificate and public ID are valid and have been issued by a certificate authority (CA) listed in the client's list of trusted CAs. Client authentication allows a server to confirm a user's identity. It’s a way to assure a client that they are dealing with the real server they intended to connect to. It can prevent any unauthorized clients from connecting to the server, preventing anyone from meddling with data going to or coming from the server.

From the very beginning SSL was designed to provide security between client and server, and to avoid any kind of 3-way man-in-the-middle attack.

Conceptually it’s quite simple: it negotiates the cryptography algorithms and keys between two sides of a communication, and establishes an encrypted tunnel through which other protocols (like HTTP) can be transported. It can also be easily passed through firewalls and proxies, as well as through NAT (Network Address Translation) without issues.

The term colocation is used in the computer industry to describe the use of a specialist data centre that is run independently and hosts file servers for a number of different companies.

Independent data centres of this type are also called colocation centres, 'colos' for short, or the more descriptive 'carrier hotels'. These data centres are set up by specialist firms with expertise in information technology, to serve the needs of numerous clients. That way, the clients can simply outsource this service to a colocation supplier and let them take care of everything for them. This is much more sensible that trying to do it yourself, for a number of reasons.

Cost is an important consideration. If you were to invest in a state of the art data infrastructure yourself, you would have to spend more than a specialist supplier who could broker wholesale deals for IT services on your behalf which could save you a great deal of money in the long run.

Economies of scale come into play too. A professional colocation supplier will have invested in large, industrial-strength systems which are bigger and more powerful that any individual firm would ever need. This means that you are getting the benefit of a more powerful system, and you can buy in to it for a low relative cost.

Time is another element of the equation. Why re-invent the wheel yourself, when a colocation supplier has data solutions at their fingertips. These would include solutions to your immediate requirements, and also remedies to any future IT problems that you don't even know you have yet!

Access to expertise is a further advantage of using colocation.
You will have the benefit of advice and support from experts in the field who have experience of looking after many different types of requirement across numerous different industries. And this access will usually be arranged on a shift system, so that you can always speak to someone at any time of the day or night on any day of the week, including weekends and public holidays like Christmas and New Year's Day.

In addition to gaining access to IT systems for networks, servers and data storage, colocation firms will also give clients the ability to interconnect with numerous telecommunications suppliers and providers of other network services. Because colocation firms look after many kinds of IT need across a wide range of industrial sectors, they will be able to suggest packages of services after doing a survey of your particular needs and current situation.

And because the colocation firm is an expert in their field, that means that the package they propose for you will have the capability of being adapted as the needs of your business change. Upgrades can be discussed and arranged quickly with people you trust, who know your business. This means that clients can then focus on their core business, without having to divert from what they do best and try and become a mini-expert on IT data systems themselves.

In any type of sales if you're not tracking your leads, your sales, your conversion rates, etc. then you are missing out on an opportunity to expand and grow your business; in the Internet Marketing world this is especially true.

There are plenty of free tools on the Internet nowadays that allow you to see how many visitors you are getting, what geographic location they are in and 'how' they got to your website. The 'how' they got to your site is the most important question of all.

You may be getting 500 visitors a month of which 300 may be coming from advertising source 'A' with another hundred coming from advertising source 'B' and yet another 50 visitors coming from advertising source 'C' with the rest coming in small increments of 1-5 from different ads that you've placed on the Internet.

One good reason to track your website visitors is it lets you know whats working in contrast to that which is barely working if working at all; this way you can save time and energy focusing on what works and tossing aside what doesn't.

Another excellent reason is, as stated before, to save time. You want an online business to enjoy the increase in time available to spend with your family, on hobbies or on whatever you want to do. If you're laboring at a computer all day wasting time on what doesn't work then you are also wasting precious time that would better be spent elsewhere.

There are all kinds of free trackers on the Internet but one of the best I've ever seen is Google Analytics. You can see everything from the number of visitors your site had from day to day, but you can also see their geographical location as well as how they were referred to your site. This is very important as you want to know what is working and what isn't. Another benefit of Google analytics is that it doesn't leave a little box at the bottom of your page which allows both you and all your visitors to see your site statistics. With Google Analytics you place a small piece of code at the bottom of your page which is invisible so only you have access to your stats.