Analysis of the impact of service availability in the network attacks lead to abnormal changes in network traffic, based on a host of real-time network flow method to assess the security situation. 在分析影響服務(wù)可用性網(wǎng)絡(luò)攻擊導(dǎo)致網(wǎng)絡(luò)流量異常改變的基礎(chǔ)上，提出了一種主機網(wǎng)絡(luò)實 時流量的安全狀況評估方法。