An engineer is onboarding a teleworker to Cisco Umbrella. After the worker's home network identity is configured, which additional action must be taken to complete the network registration?

Changing public IP addresses from static to dynamic is not relevant to Cisco Umbrella network registration; Umbrella supports both types of IPs, often with dynamic IP update clients for non-static addresses.

Cisco Umbrella provides DNS resolution services, not DHCP services, so pointing the home modem's DHCP to Umbrella is incorrect and not a valid configuration.

Setting up a point-to-point VPN with the head office provides secure network connectivity but is a separate solution and not a required step for completing basic Cisco Umbrella network registration.

After configuring the network identity in Cisco Umbrella, the critical next step for network registration is to redirect all DNS queries from the home network to Cisco Umbrella's DNS servers. This enables Umbrella to filter and secure all internet traffic originating from that network.