CMPnetAsia -
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Published on: 7/1/2002
Last Visited: 7/1/2002
In a single provider domain, service levels can be specified, but in a public environment this is not possible, notes Jon Floyd, a spokesperson for Equant (www.equant.com), a global provider of IP and data services to multinationals."Many of the ‘standards' that support the Internet are wide open to interpretation, so to expect consistency of service across the spectrum may be a little too much to ask for and maybe even impossible.
"Apart from these concerns, security and over-subscription can also present headaches," Floyd says, adding that in some cases over subscription on the Internet can reach a ratio of 50:1 or higher.Global operators such as Equant avoid many of the problems by having a single global backbone, so there is no argument about who owns the problem, Floyd adds.
Prioritising Traffic
One protocol that is helping service providers to offer greater QoS is multiple protocol label switching (MPLS), where traffic is assigned a priority label that allows for ATM-like QoS guarentees.