How does Zscaler handle DNS requests from DHCP clients?

Zscaler handles DNS requests from DHCP clients by enabling clients to query directly, which then allows Zscaler to process those DNS requests. This method is efficient because it ensures that the DNS queries initiated by the clients are routed to Zscaler's cloud-based DNS service. By doing this, Zscaler can apply its security policies and filtering capabilities, ensuring that the DNS resolutions are safe and compliant with the organization's security protocols.

This approach also benefits from scalability as the clients do not rely on any intermediary local DNS server, which may be limited in its capability or availability. Instead, by enabling direct queries to Zscaler, it utilizes its global network, which is designed to handle large volumes of DNS requests effectively.

In contrast, the other choices suggest methods that either limit flexibility for the client or don't leverage Zscaler's full capabilities. For instance, forcing all clients to use Zscaler for DNS resolutions, while seemingly effective, can limit the network's configurability and might not be suitable for all environments. Intercepting DHCP requests is not how Zscaler is designed to operate as its focus is on the security of data after the requests are made, rather than managing the initial DHCP assignments directly.