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What are the value added services
Many organisations are demanding higher services (also called value added services) such as faxing, minimal cost call routing, connectivity to the corporate EPABX, chatting, video conferencing, IP telephony, etc. These value added services, though seeming costly in the first instance, make for a reduction in recurring expenditure of communication costs while enhancing productivity. Installation of such services requires a one time high budget. The companies are realising that videoconferencing over an Intranet can offer a highly cost-effective alternative to many face-to-face meetings, especially where the members or decision makers are located at far off places.
Difference between Authentication and Deauthentication Authentication: Used to establish the self of stations to each other. Deauthentication: This service is appealed whene
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http://cseweb.ucsd.edu/~savage/papers/CCS12Exploit.pdf
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