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Question 7:

You are the network administrator for Toys World, Ltd. The network consists of a single DNS domain named toysworld.com. You replace a UNIX server with a Windows Server 2003 computer named Srv1. Srv1 is the DNS server and Start of Authority (SOA) for toysworld.com. A UNIX server named Srv2 is the mail server for toysworld.com. You receive reports that Internet users cannot send e-mail to the toysworld.com domain. You need to ensure that Internet users can send e-mail to the toysworld.com domain. What should you do?

A. Add an _smtp service locator (SRV) DNS record for Srv2.
B. Add a mail exchange (MX) DNS record for Srv2.
C. Add an alias (CNAME) record for mail.toysworld.com.
D. Enable the SMTP service on Srv1.