CompTIA Network+ (N10-008) — Question 57

A company just migrated its email service to a cloud solution. After the migration, two-thirds of the internal users were able to connect to their mailboxes, but the connection fails for the other one-third of internal users. Users working externally are not reporting any issues. The network administrator identifies the following output collected from an internal host: c:\user> nslookup newmail.company.com
Non-Authoritative answer:

Name: newmail.company.com -
IPs: 3.219.13.186, 64.58.225.184, 184.168.131.243
Which of the following verification tasks should the network administrator perform NEXT?

Answer options

• A. Check the firewall ACL to verify all required IP addresses are included.
• B. Verify the required router PAT rules are properly configured.
• C. Confirm the internal DNS server is replying to requests for the cloud solution.
• D. Validate the cloud console to determine whether there are unlicensed requests.

Correct answer: A

Explanation

The correct answer is A because checking the firewall ACL is essential to confirm that all necessary IP addresses for the cloud service are allowed through the firewall. Options B and C are less relevant in this scenario; B focuses on router configurations that may not be the issue since external users are unaffected, and C is not the main concern since the DNS resolution is functioning. Option D is also not applicable as licensing issues wouldn't typically affect internal connectivity.