What security solutions are used for home/small office vs larger networks?

Home: antivirus/antispyware plus firewall filtering. Larger networks add dedicated firewalls, ACLs, IPS, and VPNs.

Home/Small Office:

• Antivirus and antispyware software on end devices
• Firewall filtering to block unauthorized access

Larger Networks (additional):

• Dedicated firewall systems
• ACL (Access Control Lists) - filter access and traffic
• IPS (Intrusion Prevention Systems) - identify fast-spreading threats like zero-day attacks
• VPN (Virtual Private Networks) - secure access for remote workers

Security should be layered (defense in depth) — no single solution is sufficient.

Go deeper:

• Firewall (computing) (Wikipedia) — host-based firewalls (home) vs dedicated network-based firewalls between LAN and WAN (larger networks).
• Intrusion detection system (Wikipedia) — IPS/IDS placement at the network edge, an enterprise-grade control for larger networks.
• Antivirus software (Wikipedia) — the baseline endpoint protection paired with a firewall on home machines.