网络的发展令人感到瞬息万变,从去年开始,56K调制解调器已成为主流,千兆位以太网也步入市场,VPN、IP电话得到广泛应用……但更大的变化出现在网络界本身,继北方电讯合并Bay网络公司成立北方网络之后,新年刚过,朗讯科技又以200亿美元收购了Ascend公司。这些变化都在说明,语音、数据和图像统一传输的网络是未来网络发展的必然结果。3Com公司很早就提出了 The development of the Internet is changing rapidly. Since last year, the 56K modem has become mainstream, Gigabit Ethernet has entered the market, and VPNs and IP telephony have been widely used... But more changes have appeared in the network industry itself, following the north After the merger of telecommunications and Bay Networks’ establishment of the Northern Network, just after the New Year, Lucent Technologies acquired Ascend for US$20 billion. These changes all indicate that the unified transmission of voice, data, and images is the inevitable result of future network development. 3Com put forward very early