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Future access network architectures should exhibit reliability while providing broadband Internet services. Progress on research and development of reliable wired and wireless access networks is discussed in this paper. Some emerging access network architectures and their reliability issues are explained. During the past decade, the backbone network has experienced enormous growth in capacity and reliability, mainly due to major developments in optical networking. During the same time, bandwidth demands of technology-savvy end users for broadband services such as media-rich applications have also increased at an unprecedented rate.
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