随着计算机网络的发展,网络信息化在给人们带来种种方便的同时,我们正受到日益严重的来自网络的安全威胁,网络安全问题已成为信息时代人类共同面临的挑战。本文对计算机网络存在的主要安全威胁进行了分析,并从多方面探讨了确保计算机网络安全的防范措施。 With the development of computer network, network information brings people convenience. At the same time, we are being subjected to increasingly serious network security threats. Network security has become a common challenge to mankind in information age. This paper analyzes the main security threats existing in computer networks and explores the preventive measures to ensure the security of computer networks in many aspects.