DSL Internet and Cable Internet comparison
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DSL Internet and Cable Internet comparison


High speed Internet or Broadband Internet access is a high data rate Internet access, typically contrasted with dial-up access using a 56k modem. Nowadays, there are two types of high speed internet connection. One is the cable high speed internet and the other is DSL high speed internet. But which type of Internet access should you choose? Both will offer you high-speed reliable Internet access but there are a few differences between the two. The following comparison will be based the features, speed, and security of these two high speed internet connection.

Features comparison

DSL, Digital Subscriber Line, technology provides high speed, broadband Internet connections to homes and small businesses. DSL uses the same cabling used for telephones, but at higher data rates. DSL uses what is called digital modem technology and users share the same line for their digital and analog traffic. With DSL, you can use the voice and fax communication at the same time as data communication, but the further you are from your DSL service provider's facilities or telephone exchanges, the lower the speed you will get. DSL service currently requires that you have a local telephone line.

A cable modem is a device that attaches to your cable TV network connection and then to your computer. The use of a cable modem does not affect your cable TV reception and you do not need to subscribe to cable TV service in order to have cable Internet. One down size to cable modem service is that it involves locally shared bandwidth. This means the realized performance of your Internet will depend on how many other customers in your local area subscribed to the same service. Local cable Internet providers have enough bandwidth in your area that can handle a lot of users. Unlike DSL, you receive the same rate of speed no matter what distance you are from your provider.

Speed comparison

Generally cable has an advantage over DSL when it comes to speed. However, cable does not always deliver and speeds may be inconsistent. Most cable providers offer service with between 1 Mbps and 6 Mbps of bandwidth. The speed of DSL ranges from 128 Kbps to 3 Mbps. With newer fiber optic connections, the speeds are even higher. DSL offers more than 100 times the network performance of a traditional dial-up modems.

Cable technology supports a maximum of approximately 30 Mbps of bandwidth, whereas most forms of DSL cannot reach 10 Mbps. DSL and cable Internet providers often implement "speed caps" that limit the bandwidth of their services to create a fair distribution of bandwidth of customers.

Security comparison

Essentially, all cable customers in the region belong to the same network and are more vulnerable to network attacks from users on that same network. Many providers avoid this problem today by adding security features in the cable modem hardware. DSL, on the other hand, uses dedicated rather than shared cabling, and DSL customers in a given neighborhood do not appear as nodes on a shared network.

DSL and cable connections are "always on" meaning that if your computer is on and plugged into your modem then you are always online and may be more vulnerable to attacks because of that. Many DSL and cable modem customers install routers/firewalls to protect their internal systems. A DSL or cable router enhances the functionality of the basic modem with security features such as packet filtering and hiding your computer from the outside world (network).


When choosing a Broadband Internet connection, you should first consider how fast you need to go. Before signing a contract, check to make sure they guarantee the advertised speeds and see if you can find out any data on their reliability (up time). Also make sure you know how long the contract is for and how much it will cost to break the contract if there is a need. It's also good to see if they have a trial period so you can see if you like it before committing.

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