Why etherchannel may not improve performance for a given operation

Etherchannel is a standard that helps distribute different traffic flows into different links. However, sometimes people wonder why the performance for a particularly large traffic flow many not necessarily be sped up this way. The issue here is that etherchannel doesn’t split up the packets for a single flow of traffic; it simply helps distribute…

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Take advantage of pixel density with HTML 5.1’s srcset attribute

With advances in screen technology (as pioneered by Apple’s Retina display), some devices may actually be able to offer additional resolution within a pixel. To take advantage of the ability to display sharper images, you can use HTML 5.1’s srcset attribute to specify different images for the same layout. For example, following code displays a…

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Make sure your online backup is there when you need it

Online storage can be a great way back up files so that disasters that affect your building don’t wipe out your data. However, just because your data are backed up online doesn’t mean they’re safe.   As an example of how unreliable online storage can be, in October 2014, Bitcasa subscribers received a generic, spam-filter-triggering…

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Perform fail-safe firmware upgrades

A key component to maintaining the reliability and efficiency of your network is keeping the firmware on your network devices up-to-date. As you know, these devices can include managed switches, routers, wireless access points, and intrusion detection systems among others. Unfortunately, the device’s documentation doesn’t always provide the proper procedures for upgrading the firmware successfully.…

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Use care when upgrading hand-held operating systems

Upgrading operating systems has become almost automatic, as it’s a crucial element of security maintenance. However, rapid advances in computer hardware have made it easy to forget the need to also consider system resources when upgrading to any new operating system. Clearly, this becomes more of an issue with hand-held devices, which typically are far…

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