Acompany jus has completed vulnerability scan of its servers. a legacy application that monitors the hvac system in the datacenter presents several challenges, as the application vendor is no longer in business. which of the following secure network architecture concepts would best protect the other company servers if the legacy server were to be exploited? a. virtualization
b. air gap
c. vlan
d. extranet

correct option is c. VLAN

Explanation:

we know here company complete vulnerability scan

and A legacy application that monitors the HVAC system and there application vendor is no longer in business

so BEST protect the other company servers if the legacy server were to be exploited is virtual LAN (VLAN) because

VLAN  is any broadcast domain that is partition

and it is isolated in a computer network at data link layer

virtual LAN is used to separate traffic within the business due to users because virtual LAN allow networks and devices that kept it separate to share the same physical cabling by not interact and improve simplicity and security and  traffic management and economy

so correct option is c. VLAN

i'm pretty sure the answer is 60.