a. The primary key cannot be null. b. None of these choices is correct. c. Most tables need a foreign key. d. Tables are linked by using foreign keys.

Can online classes such as gradpoint track your ip location like if im taking a final and i give somebody else my account and they take the final for me will it show where they are taking the final from? and can this be countered with a vpn

When is it appropriate to use an absolute reference

Once the data center routes to the destination server that hosts the website, what's the next step in the internet process? user’s browser renders html code from destination server into web page request goes through router/model and isp request routed to nameserver and datacenter