What should you do to ensure that mail delivery occurs between the two Exchange servers?

You are the Exchange administrator for your company. The network consists of two sites. Each site has its own IP subnet.

Each site contains a computer that runs Exchange Server 2003.The two Exchange servers are named Mail1 and Mail2.

The configuration of the network and the servers is shown in the following diagram.

Users in each site have mailboxes on the Exchange server in their own site.
Users in site A report that they can connect successfully to Mail1, but that email sent to users in site B is not delivered.

You test connectivity between the sites by using the ping command.

When you attempt to ping Mail1 from Mail2, you receive the following error message: “Destination host unreachable.”

You need to ensure that mail delivery occurs between the two Exchange servers.

What should you do?

A.
Reconfigure the subnet mask on Mail1 to be 255.255.255.224.

B.
Reconfigure the default gateway address on Mail1 to be 131.107.1.33.

C.
Reconfigure the subnet mask on Mail2 to be 255.255.255.240

D.
Reconfigure the default gateway address on Mail2 to be 131.107.1.33.

Explanation:

Site A IP address 131.107.1.10 mask 255.255.255.240, their 3 first bytes are fixed 240 means in binary -> 1111.0000 (jump 24^16) router goes to 131.107.1.0-15, 131.107.1.16-31, 131.107.1.3247, where 131.107.1.0-15 is own subnet in this segment the IP address 131.107.1.0 is the network address and IP address 131.107.1.15 is broadcast address, rest of IP are for HOST in this case exchange 131.107.1.10 and 131.107.1.1 router.

Site B network address is 131.107.1.32 mask 255.255.255.240 go from 131.107.1.32 to 131.107.1.47 where 131.107.1.32 is the network address and 131.107.1.47 broadcast address the other IP are for host in this case 131.107.1.40 for exchange and 131.107.1.33 for router.