123) Potential classes of service may offer throughput, loss, delay, or jitter that is relatively better than the throughput, loss, delay, or jitter provided by best-effort service during times of congestion (124) or may provide a performance that is more constant and predictable than best-effort service.
The service, named Group-Ether, is a best-effort service offering low-cost nationwide network coverage by taking advantage of broadband access lines that NTT Com's sister companies NTT East and NTT West provide with certain versions of their FLET'S-branded Internet access services.
In order to preserve the reliability and QoS for business applications, enterprises should enable the WLAN system's QoS features for critical voice, data and video applications on the corporate ESSID, while providing best-effort service for the guest ESSID.
Using service level agreements (SLA) carriers may offer symmetrical high-speed data, dedicated wavelengths and guaranteed bandwidth floors to premium customers, while offering best-effort service levels to other less demanding customers at lower tariffs.
Given the nature of best-effort service, traffic shaping is imperative to ensure that bursty LAN (local area network) traffic does not exceed the peak cell rate of 10 Mbps that is part of the SLA between Bezeq and Elite.
This requires moving from best-effort service creation and verification to a full-service management model, where cost-effective, protected, edge-to-edge services can support bandwidth provisioning and varied quality of service guarantees negotiated with each customer.