Câu 27: 70-341: Core Solutions of Microsoft Exchange Server 2013

Your company has a main office site and a disaster recovery site. The two sites connect to each other by using redundant WAN links. Each site connects directly to the Internet. Each site contains one Exchange Server 2013 server that is accessible from the Internet. The company uses the contoso.com email address suffix. The DNS records that can be resolved from the Internet are configured as shown in the following table. When the Internet link at the main office site fails, the company cannot receive incoming email from the Internet. You need to ensure that incoming email from the Internet is delivered to Server1. Incoming email from the Internet must be delivered to Server2 if Server1 is unavailable. What should you create?

1. A. A CNAME record for the name mail.contoso.com that resolves to server2.contoso.com
2. B. An MX record that has a cost of 20 and resolves to mail.contoso.com
3. C. An MX record that has a cost of 20 and resolves to server2.contoso.com — đáp án hiện tại
4. D. An A record for the name mail.contoso.com that resolves to 131.107.101.1