6DMITRY BOKOTEY, ANDREW MASON, RAYMOND MORROW. CCIE Security实验指南[M].陈晓筹,邝卫国,译.北京:人民邮电出版社,2005.28-29.
7RICHARD STEVENS W. TCP/IP Illustrated Volume 1: The Protocols [ M] . [S. l. ] : Addison-Wesley, 1994: 301-303.
8TANENBAUM A S. Computer Networks [ M]. 3th ed.熊桂喜,王小虎,译.北京:清华大学出版社,2001.101-105.
9DAVID M, WILLIAM H, KISHOR S. Model-Based Evaluation: from Dependability to Security [ J ]. IEEE Transactions on Dependable and Secure Computing, 2004, 1 ( 1 ) : 48-65.
