00318nam a2200109Ia 4500008004100000041001200041082001100053100001700064245007600081260003700157650001400194221030s9999    xx            000 0 und d  aEnglish  a105.23  aW. Stallings 0aNetwork Security Essentials : Applications & Standardscby W. Stallings  bPearson   EducationaDelhic2006  aComputers