Free CompTIA Network+ N10-009 Actual Exam Questions - Question 10 Discussion
SIMULATION You are tasked with verifying the following requirements are met in order to ensure network security. Requirements: Datacenter Ensure network is subnetted to allow all devices to communicate properly while minimizing address space usage Provide a dedicated server to resolve IP addresses and hostnames correctly and handle port 53 traffic Building A Ensure network is subnetted to allow all devices to communicate properly while minimizing address space usage Provide devices to support 5 additional different office users Add an additional mobile user Replace the Telnet server with a more secure solution Screened subnet Ensure network is subnetted to allow all devices to communicate properly while minimizing address space usage Provide a server to handle external 80/443 traffic Provide a server to handle port 20/21 traffic INSTRUCTIONS Drag and drop objects onto the appropriate locations. Objects can be used multiple times and not all placeholders need to be filled. Available objects are located in both the Servers and Devices tabs of the Drag & Drop menu. If at any time you would like to bring back the initial state of the simulation, please click the Reset All button. 
I think the datacenter should have a DNS server specifically, since port 53 is for DNS. For Building A, replacing Telnet with SSH makes sense for security, and adding devices for users likely means more DHCP support there.
Building A also needs a secure remote access server instead of Telnet, so SSH fits better.
I’d say the Datacenter definitely needs a DNS server for port 53, since DHCP doesn’t handle hostname resolution. For Building A, adding devices to support the extra users means a DHCP server there too, plus swapping Telnet for SSH is a must for security. The screened subnet needs servers dedicated to handling ports 80/443 and 20/21, so placing web and FTP servers there fits. Subnetting everywhere is key to keep address use efficient while allowing communication. So overall, mix DNS servers where hostname resolution is needed, DHCP for IP management, and appropriate specialized servers on the s
Datacenter needs DNS specifically for port 53, DHCP won’t handle that.
Datacenter definitely needs DNS for port 53, DHCP alone won’t cut it.
For Building A, swapping Telnet with SSH makes sense for security. Also, adding a DHCP server there helps manage those extra users without wasting IP addresses.
Adding a DHCP server in Datacenter covers IP and hostname resolution on port 53.
I think for the Datacenter, we need a DHCP server for IP management and DNS for hostname resolution—maybe that’s what they mean by handling port 53 traffic. For Building A, adding 6 users total means adjusting the subnet size, and replacing Telnet with SSH makes sense for security. The screened subnet needs web servers for ports 80/443 and FTP servers for 20/21. Does that sound right?