Zscaler ZDTE Exam Dumps - Actual Questions Answers

In ZIA, user traffic is first forwarded to a Zscaler Enforcement Node (ZEN), where security and access policies are enforced and transaction logs are generated. Those logs are then sent from the ZEN to the cloud-based Nanolog cluster, which is the highly scalable logging and storage layer used by Zscaler. Nanolog compresses and stores the logs for reporting, analytics, and long-term retention.

To deliver logs to a customer’s SIEM, the Nanolog Streaming Service (NSS) is deployed in the customer environment. NSS establishes a secure, outbound tunnel to the Nanolog service in the Zscaler cloud and subscribes to that customer’s log stream. Nanolog then continuously streams a copy of relevant logs over this secure connection to NSS. NSS receives the logs, converts them into the required output format (for example, syslog or CEF), and forwards them on to the configured SIEM or log receiver.

Option C is the only answer that correctly represents the logical sequence: user traffic through ZEN, ZEN to Nanolog, secure tunnel from NSS, Nanolog streaming to NSS, and finally NSS forwarding to the SIEM.

===========

Zscaler design guidance for GRE connectivity emphasizes three key principles: terminate GRE on border (edge) devices, avoid NAT on GRE source addresses, and scale bandwidth by using multiple tunnels. In Zscaler documentation and engineering training, each GRE tunnel is typically sized for up to about 1 Gbps of throughput. For a 2 Gbps requirement, customers are advised to deploy at least two primary GRE tunnels, with two additional backup tunnels for redundancy and failover.

These tunnels should terminate on border routers that own public IP addresses, ensuring optimal routing and simplifying troubleshooting. Zscaler specifically recommends that the public source IPs used for GRE must not be translated by NAT, because the Zscaler cloud must see the original, registered public IP to associate tunnels with the correct organization and enforce policy. Enabling NAT on GRE traffic can break tunnel establishment and lead to asymmetric or unpredictable routing.

Using internal routers introduces extra hops and complexity and often requires NAT or policy-based routing, which goes against recommended best practices. Similarly, any architecture with NAT enabled on GRE traffic conflicts with Zscaler’s published requirements. Therefore, the ideal and recommended design for 2 Gbps via GRE is two primary and two backup GRE tunnels from border routers with NAT disabled.

Zscaler Internet Access (ZIA) supports regional processing requirements through the concept of subclouds. A subcloud is defined as a subset of ZIA Public Service Edges (and optionally Private Service Edges) that operate as full-featured secure internet gateways inspecting all web traffic. ZIA administrators can create a custom pool of data centers (Public Service Edges) that are constrained to a specific geography and then associate locations or tunnels with that subcloud. This ensures that user traffic forwarded to ZIA is only terminated and inspected within that defined regional pool, helping satisfy data-residency and regulatory mandates

By contrast, Zscaler’s default behavior is to use geo-IP and DNS to send traffic to the nearest available Public Service Edge globally, which may violate regional-processing rules (making option D unsuitable in a compliance-driven scenario) Bypassing ZIA (option A) or deploying local VPNs (option C) would undermine the Zero Trust model and remove ZIA’s inline security controls. Therefore, configuring a subcloud that includes only Public Service Edges in the mandated region is the architecturally correct and exam-aligned method to keep inspection within a specific geography.

===========