Jan 2, 2013
Just as we need clear arteries to deliver life-giving oxygenated blood to our hearts, corporate networks that connect remote employees, customers, and partners need optimum bandwidth utilization for fast, reliable delivery of applications and information exchange.
The problem is, just as human arteries can become congested with plaque caused by calcium, fat, and cholesterol — constricting blood flow and even causing a complete blockage — WANs, too, become congested with excessive data, application turns, and network protocol retransmissions, latency and jitter. Eliminating these dangers will restore the communication flow and help prevent serious consequences.
Networks face additional problems that can prevent data packets from arriving at their destination on time — or at all. Packet loss is increasingly prevalent on shared WANs, where congestion causes packets to be dropped or delivered out of order. This lowers application quality and prevents data transfers from happening within specific time periods.
Just as there are remedies for compromised arteries, the go-to remedy for networks suffering from packet loss is to use Forward Error Correction (FEC) technology. FEC rebuilds dropped packets on the far-end of the WAN connection as they are lost, while Packet Order Correction technology fixes out-of-order packets in real-time.
There have been huge medical advances in the detection, diagnosis and treatment of coronary artery disease, with many new options for controlling, correcting and even reversing the effects of the disease. Similarly, bandwidth reduction technologies have evolved in recent years. Traditional compression, QoS, and TCP acceleration techniques have been enhanced with disk-based data reduction.
Advanced WAN optimizers can use dedicated disk-based local drives to monitor communications in real-time, “fingerprinting” data sets and storing a single instance of each piece of information locally for future reference. When duplicate data is sent between the devices, they send a reference across the WAN rather than the actual data, while the changed data is delivered from the local data store on the far-end device.
WAN optimizers can keep your communication ‘arteries’ clear and optimized so you can deliver traffic faster and support more remote users.
Image credit: Klearchos Kapoutsis (flickr)