Is zero trust realistic for a small business?

As a direction, yes; as a product you buy, no. Zero trust means not trusting a connection just because it comes from inside the network: every user and device proves who it is, and each gets access only to what it needs, checked again and again. A small company can go far with a few steps: multi-factor authentication on every account that faces the internet, separate networks for guests, IoT devices and servers, admin rights only where needed and through separate admin accounts, and a VPN or gateway that reaches only the systems each group uses. Do them in that order; each one is useful on its own. Network monitoring checks the result: NetSenX shows which hosts actually talk to which on monitored segments, on every plan, so a path that should not exist becomes visible.

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