Download PDF by Madjid Nakhjiri: AAA and Network Security for Mobile Access: Radius,

By Madjid Nakhjiri

ISBN-10: 0470011947

ISBN-13: 9780470011942

Notwithstanding an intensive therapy of all of the appropriate points of the marketed parts of community safety, the English is undesirable sufficient to be ambiguous and distracting and lots of locations. A urged paintings if the reader is ready to wait and see and diligent with the awkward use of the English language.

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Extra info for AAA and Network Security for Mobile Access: Radius, Diameter, EAP, PKI and IP Mobility

Sample text

This model is called even-driven model without batching and is rather inefficient. An event-driven model typically stores accounting events that have not yet been delivered only until a timeout interval expires. Once the timeout interval has expired, the accounting event is lost, even if the device has sufficient buffer space to continue to store it. As a result, the event-driven model has the smallest memory requirement, and is the least reliable, since accounting data loss will occur due to device reboots, sustained packet loss, or network failures of duration greater than the timeout interval.

Through implementation of a scheduling algorithm, event-driven systems with batching can deliver appropriate service to accounting events that require low processing delays. For example, high-value inter-domain accounting events could be sent immediately, thus enabling use of fraud-prevention techniques, while all other events would be batched. As a result, this approach can have good scalability and flexibility characteristics. In the event-driven polling model, an accounting manager will poll the device for accounting data only when it receives an event.

Both authentication, authorization, and accounting requirements are covered in this specification. In this final section of the chapter, we provide a few examples from this specification. It should be noted that these requirements are not specific for support of a specific AAA protocol; as a matter fact as we will see in Chapter 6, RADIUS clients (NAS) actually do not meet many of these requirements. ● ● ● ● ● ● ● ● ● ● ● AAA protocols are considered application level protocols and hence must be carried by other communications protocols, including transport layer protocols.

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AAA and Network Security for Mobile Access: Radius, Diameter, EAP, PKI and IP Mobility by Madjid Nakhjiri


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