| 1. | Computer network has been characterized by features like heterogeneous connection , uneven dispersiveness and openness , which also result in its vulnerability to be attached by hackers , malicious unauthorized intrusion . that ' s why network security has been attracting people ' s attention in various fields
但由于计算机网络具有联结形式多样性、终端分布不均匀性和网络开放性等特征，致使网络容易受黑客、恶意软件和其他不轨的攻击，网上信息的安全和保密已受到人们广泛的关注。 |
