Teaching CCNAx Day 1 . dpapkinJune 3, 2014 David Papkin Category No Comments Teaching CCNAx Day 1 .IP subnetting david mark papkin, David Papkin ← Razor vmware training Taught 20411D day 1 issue → Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.