On this problem I have subnet the given ip, connect router 1 and 2 but 2 and 3 seems to be difficult to be connect because I get confused on the subneting. I have 60 percent of this problem but I won't pass that percent. I am stuck anybody can give m...

I am compliting this packet tracert activity http://dc314.4shared.com/doc/jfFG54Ta/preview.htmlI have started subnetting. the activity ask to create 7 subnets, The problem is that it wants 60 hosts in one subnet, 30 in another and so for. When I calc...

Does anybody knows about a source of information which explains this terms, Those are protocools to organize e-mail data but I don't know how it works.

In the Outbound and Inbound pdu's there is a field call preamble I want to know how it works and the methodology behind.