The Precarious State of the WAN

 
 
By Michael Vizard  |  Posted 03-28-2014 Email Print this article Print
 
 
 
 
 
 
 
 

In the age of the global cloud computing, reliance on wide area networks (WANs) has never been greater. The challenges facing CIOs is that while networks have become much more robust in the last decade, there is still a considerable difference between what an enterprise IT organization might experience in terms of application performance across a WAN in an emerging economy than what is generally seen in Europe or North America. To illustrate that point, Aryaka Networks, a provider of WAN optimization services that are delivered via the cloud, has issued a report that details the types of traffic are moving across WANs around the globe and the response times that customers are experiencing. The good news is that about two-thirds of the traffic is being generated by sites that have access to WAN links that provide 10 Mbps second or greater bandwidth. The bad news is that packet loss in places such as China and India can still be as high as 2.1 percent. Given the expense associated with deploying private leased lines, the odds are that the number of companies looking to accelerate cloud application performance across the WAN using standard Web protocols will be substantially higher within the next two years. The challenge? Finding the most cost-effective approach to achieving that goal.

 
 
 
  • WAN Traffic Growth by Region

    Overall worldwide mean growth in demand for WAN bandwidth grew 282%. China: 485%, Asia-Pacific: 321%, Europe, the Middle East and Africa: 312%, India: 302%, North America: 282%
    WAN Traffic Growth by Region
  • Average WAN Access Link Speeds

    Most WAN connections into branch offices are relatively slow. Greater than 41 Mbps: 12%, 21 to 40 Mbps: 8%, 11 to 20 Mbps: 21%, 10 Mbps: 26%, 5 to 9 Mbps: 14%, Less than 4 Mbps: 19%
    Average WAN Access Link Speeds
  • Top Types of WAN Traffic

    HTTPS traffic has increased significantly as organizations move to encrypt their web traffic. HTTP: 96%, CIFS: 87%, Microsoft Remote Desktop: 82%, HTTPS: 81%, Microsoft Endpoint Mapper: 76%, SMTP: 55%
    Top Types of WAN Traffic
  • Top Types of WAN Traffic by Volume

    Web traffic in the form of HTTP has moved to the fore in terms of total volume. HTTP: 24%, CIFS: 20%, FTP: 18%, HTTPS: 15%, RSYNC: 12%, Symantec: 11%
    Top Types of WAN Traffic by Volume
  • Type of Applications With Greatest Potential for Data Reduction on WAN

    Not all application types lend themselves equally to compression to reduce bandwidth consumption. Perforce: 84%, Print JetDirect: 83%, DNS Service Replication: 79%, Microsoft SQL: 68%, IMAP: 62%, HTTP: 61%
    Type of Applications With Greatest Potential for Data Reduction on WAN
  • Minutes of Bad WAN Traffic in North America

    A "bad minute" is one in which either measured ping packet loss exceeds 4 percent or where ping packet loss exceeds 1 percent and TCP retransmissions exceed 3 percent., Less than 0.5 percent: 81%, 0.5 percent to 2 percent: 11%, 2 to 5 percent: 6%, Greater than 5 percent: 2%
    Minutes of Bad WAN Traffic in North America
  • Packet Loss Per Region

    WAN networks are less reliable in developing regions. China: 2.1%, India: 2.1%, Asia-Pacific: 1.7%, North America: 0.7%, Europe, the Middle East and Africa: 0.3%
    Packet Loss Per Region
  • Percentage of Companies Using WAN Acceleration for Cloud Applications

    Usage of WAN acceleration techniques to accelerate cloud application performance remains in its infancy. No: 89%, Yes: 12%
    Percentage of Companies Using WAN Acceleration for Cloud Applications
  • Average Percentage of Accelerated WAN Traffic

    Those that accelerate cloud traffic tend to generate a lot of bandwidth requirements. All Other WAN Traffic: 53%, Accelerated WAN Traffic: 47%
    Average Percentage of Accelerated WAN Traffic
 
 
 
 
 
Mike Vizard has been covering IT issues in the enterprise for 25 years as an editor and columnist for publications such as InfoWorld, eWeek, Baseline, CRN, ComputerWorld and Digital Review.

 
 
 
 
 
 

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