DSL

When you connect to the Internet, you might connect through a regular modem, through a local-area network connection in your office, through a cable modem or through a digital subscriber line (DSL) connection. DSL is a very high-speed connection that uses the same wires as a regular telephone line.

Here are some advantages of DSL:

You can leave your Internet connection open and still use the phone line for voice calls.

The speed is much higher than a regular modem

DSL doesn't necessarily require new wiring; it can use the phone line you already have.

The company that offers DSL will usually provide the modem as part of the installation.

But there are disadvantages:

A DSL connection works better when you are closer to the provider's central office. The farther away you get from the central office, the weaker the signal becomes.

The connection is faster for receiving data than it is for sending data over the Internet.

The service is not available everywhere.

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Meaning of HTTP Status Codes

HTTP, Hypertext Transfer Protocol, is the method by which clients (i.e. you) and servers communicate.

When someone clicks a link, types in a URL or submits out a form, their browser sends a request to a server for information. It might be asking for a page, or sending data, but either way, that is called an HTTP Request. When a server receives that request, it sends back an HTTP Response, with information for the client.

Usually, this is invisible, though I'm sure you've seen one of the very common Response codes - 404,

indicating a page was not found. There are a fair few more status codes sent by servers, and the following is a list of the current ones in HTTP 1.1, along with an explanation of their meanings.