which must work for years (96) any external power sourc

All traffic, be it e-mail or streaming video, travels via a method called packet switching, (97)parcels out digital data into small chunks, or packets, and sends them over a network shared bycountless users.

【In the forthcoming years,Beyond-3G(B3G) environments will undoubtedly be deployed in most parts around the globe, permitting a world class solution for network interconnection, A B3G context enables the efficient cooperation of existing wireless technologies, including cellular-based(e.g. 2G/3G), broadcast-oriented(e.g. DVB)-in specific DVB-H, and Internet-based(WLAN/WMAN)networks, all relying on enhanced IP as the unifying layer. Hence, in this particular and yet to be deployed environment, mobile, systems and platforms will permit to provide enhanced services to all applications across heterogeneous access networks. This will effectively enlarge the scope of service deployment, availability and accessibility to the users】 Based on the paragraph above, it is shown that (98) will be used as the higher layer protocol to unify cellular networks ,broadcast networks and (99) networks, which is enabled by the context of (100).

A.Internet-based

A.IP network

IP电话卡是IP电话的一种方式，按照持卡用户的付费方式分类，如该用户是按月付费的，则是（）类用户。