However, video of multimedia service will be harmfully influenced from high variation of usable bandwidth and lack of QoS guarantee over widespread Internet and wireless network.

• 然而，在网际网路或无线网路中均具有可用频宽高变动性及欠缺服务品质保证的特性，对于视讯多媒体服务的提供将造成十分负面的影响。