طبقة العرض: الفرق بين النسختين

<ref name='SASE and CASE and major protocols'>{{استشهاد ويب|مسار=httphttps://www.corenetworkz.com/2009/01/presentation-layer-sixth-layer-in-osi.html|عنوان= SASE and CASE and major protocols|ناشر=corenetworkz.com| مسار أرشيف = https://web.archive.org/web/20180228072824/http://www.corenetworkz.com:80/2009/01/presentation-layer-sixth-layer-in-osi.html | تاريخ أرشيف = 28 فبراير 2018 }}</ref>

<ref name='X.25 PAD'>{{استشهاد ويب|مسار=httphttps://www.webopedia.com/TERM/P/PAD.html|عنوان= X.25 PAD|ناشر=webopedia.com| مسار أرشيف = https://web.archive.org/web/20190507024146/https://www.webopedia.com/TERM/P/PAD.html | تاريخ أرشيف = 7 مايو 2019 }}</ref>