To secure the network at a physical layer, your client should implement port-level security on switches (e.g., MAC address binding, 802.1X authentication) so that only authorized devices can connect, regardless of knowing the IP. Combine this with network segmentation/VLANs to isolate sensitive systems from general access, and apply firewall rules that restrict incoming traffic to specific, trusted devices. Enabling host-based firewalls and disabling unused services will prevent IP-based exploitation. For maximum safety, pair these controls with data encryption at rest and in transit—so even if network media is compromised, the data remains unreadable.
