Answer:
for safety everyone is needed, read the explanation
Step-by-step explanation:
- These tools protect networks from external threats.
A) firewalls
B) routers
C) antivirus software
D) VPN
the firewall, which can be installed in the pc but some routers also have it.
An antivirus is certainly needed, an antimalware is missing from the list, which is essential, for the VPN it is also useful to make believe you are connected in one place and instead you are in another, so I would say that all are needed for PC security