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Horses for wireless courses

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Reducing security risks from open source software

Our increasing appetite for sending and receiving data on the move fuels ever increasing need for wireless connectivity. Wi-Fi access and mobile broadband are usual ways of meeting this need. So what's best?

At this stage, WiFi is ahead in convenience terms, but it is debatable by how much - particularly when roaming - and for how long. Most notebooks shipping today incorporate embedded WiFi connectivity – which is about as convenient as it gets.

Mobile broadband today typically requires a USB dongle or data card, which a user has to buy, remember to carry around with them, as well as ensure it doesn’t get lost or damaged. But we are now starting to see the emergence of laptops with integrated mobile broadband. In terms of accessibility, this is should put mobile broadband on par with WiFi.

The gap begins to widen when assessing fitness for purpose. At this stage, users should themselves what they require connectivity for, how long they need it, and where they will be when they need to connect. Factors include what the connection is being used for, e.g. reading/sending email, document access, browsing, and whether connectivity is required at a static location, or on the move, e.g. on a train.

WiFi generally offers high speeds via a reliable connection, although speed may be affected if the wireless network is heavily congested. WiFi also limits mobility to the range of the WiFi network – typically around 100m. When locating hotspots, at first glance there are a vast number. But advance research is necessary to verify if the available hotspots suit the user requirement. Often, hotspots are limited to locations such as cafes and bars, and do not necessarily cover other locations such as train stations (although new hotspots are continually appearing). Also, users need to arrange access to wireless networks, many of which come at a price.

Ándale! Ándale! Arriba!

Mobile broadband already provides almost ubiquitous connectivity, without the issue of network range and accessibility. This comes at a price, as mobile broadband is often slower than a WiFi connection. But this is an ever-evolving picture, with mobile operators determined to stay in the game. Vodafone Spain, for example, recently completed a successful mobile broadband trial, which achieved peak data download rates of up to 16 Mbps.

The story gets more complex when it comes to costs. WiFi in the home or office results in no new costs after configuration costs to hook in to the network. When users move beyond these boundaries, additional costs are incurred for access to public hotspot. Some locations offer free WiFi access, and in an ideal world, a user would assess, well in advance, the pros and cons associated with a given hotspot. This isn’t always practical or simple and users need to ensure their computer is configured to minimise the risks – we discuss this below.

Mobile broadband pricing is increasingly competitive, with low priced monthly subscriptions becoming more common. And pay as you go offers are coming onto the market. But packages are often accompanied by restrictive download limit: service providers want to control the high cost associated with transferring data across the 3G network and prevent the network from being overloaded. But users with heavy download requirements can rack up high charges very quickly, particularly if they do not actively monitor their usage.

International roaming is another complication. With mobile roaming charges often at high levels it makes sense to investigate available WiFi options at utilised locations, for example within a hotel.

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