Tips

Tips

WAN technologies and services

  • Choosing WAN providers: Key questions to ask

    When evaluating carrier services for the WAN, it's imperative to ask some key questions regarding customer service, service-level agreements, global coverage, management and monitoring capabilities, and underlying technologies. Make sure these ...  Continue Reading

  • Understanding the FTP PORT command

    Port 20 is assigned to FTP data. Unfortunately, most FTP data sessions do not actually use port 20. Learn to decode port data and use the port command in this tip.  Continue Reading

  • Seeing through transparency claims

    WAN acceleration and optimization techniques require communication between devices for consistent, reliable compression and decompression of data packets. In this tip, learn the pros and cons of header transparency and peering technologies and find ...  Continue Reading

  • WAN acceleration scalability: Part 3

    As WAN acceleration becomes more critical to business operations, the average size and scope of deployment is steadily increasing. In this tip, we wrap up our series on considerations for scaling a WAN acceleration solution that are critical when ...  Continue Reading

  • Migrating to MPLS, part 2

    Network engineers must be on top of MPLS technology and prepare their current networks for the transition to MPLS from other transport options. This tip continues Doug Downer's series on migrating to MPLS; here, he outlines the typical MPLS site and...  Continue Reading

  • WAN acceleration scalability: Part 2

    Dr. David Hughes continues his discussion of the top considerations for scaling a WAN acceleration appliance. Here are numbers three through six: performance under load, hardware acceleration for encryption, breadth of application supported and QoS.  Continue Reading

  • MPLS transport options

    Learn options for MPLS transport and the criteria you should consider when deciding among them in this tip. Author Robbie Harrell also takes a technical look at how carrier transport architecture affects the access links that connect to the MPLS ...  Continue Reading

  • WAN acceleration scalability: Part 1

    As WAN acceleration becomes more critical to business operations, the average size and scope of deployment is steadily increasing. This creates a variety of questions pertaining to product scalability. What happens when new applications are deployed...  Continue Reading

  • How network path congestion and delayed ACKs affect network performance

    This tip delves deep into the bandwidth myth. In part 3, we analyze how multiple effects and multiple causes complicate troubleshooting of network performance.  Continue Reading

  • NASA space probes, throughput and error probability

    This tip delves deep into the myth of bandwidth. Part 4 demonstrates how in an environment such as NASA's space probes, there isn't much tolerance for network latency -- and introduces how errors can slow down network performance.  Continue Reading

  • Rate delay product

    This tip series delves deep into the bandwidth myth. Part 5 discusses the rate delay product, an efficiency parameter that describes how much data a sender can dump into the network path before it will have any expectation of seeing a response.  Continue Reading

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