Answer:
Check the explanation
Step-by-step explanation:
1) The single router approach is a security Implementation of all security policies and the defense-in depth approach employs a firewall. the DMZ approach Is establish between two routers with a firewall.
2) The single router approach is for small offices and homes.
The defense in depth approach is for large organizations.
The DMZ approach is for publicity operated networks.
3) The DMZ can provide better defense because it has more than two firewall for increased security.