Topic 2, Plan and implement networking and security in Office 365
DRAG DROP
You implement Office 365 for an organization.
You must create the correct DNS entries needed to configure Exchange Online.
Which DNS entries should you create? To answer, drag the appropriate DNS record type to the correct purpose. Each DNS record type may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
Answer: 
Explanation:
TXT record is used for verification. When you have added the record at your domain registrar’s site, you’ll go back to Office 365 and request Office 365 to look for the record. When Office 365 finds the correct TXT record, your domain is verified.
MX (mail exchanger) record points to where your email should be sent. It also has a priority field so that you can send mail to different servers in a priority order.
CNAME (alias or canonical) record redirects one domain to another in the DNS system. When a name server looks up a domain and finds that it has a CNAME record, the server replaces the first domain name with the CNAME, and then looks up the new name.