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1.3 NGN architecture and main elements.ogs.pdf - BTCl

1.3 NGN architecture and main elements.ogs.pdf - BTCl

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<strong>NGN</strong> Network ElementsDiameterThe Diameter base protocol defines the minimum requirements forAuthentication, Authorization <strong>and</strong> Accounting (AAA) in an IMS network<strong>and</strong> is the successor of the Radius protocol by incorporating advancedfunctionalities.IPsecIPsec is an end-to-end security scheme operating in the Internetlayer within a protocol suite including among others the ESP(Encapsulating Security Payload) . It can be used in protecting dataflows between a pair of hosts (host-to-host), between a pair ofsecurity gateways (network-to-network), or between a securitygateway <strong>and</strong> a host (network-to-host). Used procedure is by meansof authentication <strong>and</strong> encryption of each IP packet of acommunication session.Dhaka, Bangladesh, May 2011ITU - <strong>NGN</strong> <strong>elements</strong> - OGSInternationalTelecommunicationUnion23

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