Zscaler Updated ZDTA Exam Questions and Answers by dina

One GRE tunnel is sufficient because the required 700 Mbps is below Zscaler’s documented per-tunnel limit and the scenario does not require failover. Zscaler’s GRE deployment best practices state that a GRE tunnel supports up to 1 Gbps when internal addresses are not behind NAT. The GRE self-provisioning guidance also explains that one static IP address can be mapped to a GRE tunnel. Because the underlay is trusted, GRE’s lack of encryption is acceptable for this requirement and avoids IPSec encryption and rekey overhead. A single IPSec tunnel is unsuitable for 700 Mbps because Zscaler documents a lower per-public-source-IP limit for IPSec. Two tunnels add unnecessary configuration and routing complexity when high availability is explicitly excluded. Capacity, MTU, routing, and Service Edge reachability should still be validated before production use.

Comprehensive and Detailed 100 to 150 words of Explanation From Zscaler Digital Transformation Administrator topics:

OpenID Connect is an identity layer built on OAuth 2.0 and commonly represents identity information in JSON Web Tokens (JWTs), making C correct. A signed ID token carries claims about the authenticated user and can be validated by the relying service using the issuer’s published keys. This JSON-based design distinguishes OIDC from SAML, which normally represents assertions in XML. OIDC does not inherently require annual certificate maintenance; signing keys and validation metadata are managed through the provider’s configuration and key-discovery mechanisms. Attribute-based access control can consume identity claims, but it is not the protocol characteristic being tested. Zscaler’s administrator study material identifies JWTs as JSON-based tokens used in OIDC contexts, and its OpenID configuration documentation explains that attributes are obtained from the OIDC JSON.

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The PAC file associated with the Forwarding Profile helps Zscaler Client Connector identify how traffic should be forwarded and which ZIA Service Edge path should be used. The App Profile assigns the Forwarding Profile, but the forwarding PAC is the mechanism that drives service-edge selection logic for ZIA traffic. Option B (The PAC file used in the Forwarding Profile) is correct because the Forwarding Profile PAC is the relevant steering mechanism.

Why the other options are incorrect:

A. The IP ranges included/excluded in the App Profile: App Profile include/exclude ranges influence what traffic the client should handle. The question asks how the ZIA Service Edge is identified, which comes from the forwarding PAC logic.

C. The PAC file used in the Application Profile: A PAC file tells the client or browser which proxy path to use for matching destinations.

D. The Machine Key used in the Application Profile: A machine key identifies the installed device/client context; it is not the PAC/service-edge steering mechanism.

Trusted Network Detection relies on observable network signals from the endpoint. Hostname/IP resolution, DNS server, and DNS search domain are valid criteria because they indicate whether the device is attached to a known corporate network. Option D (DNS Search Domain, DNS Server, Hostname Resolution) is correct because it lists supported trusted-network criteria.

Why the other options are incorrect:

A. Hostname Resolution, Network Adapter IP, Default Gateway: Default Gateway can identify a local network path, but it is not always one of the exact trusted-network criteria set in this item.

B. DNS Servers, DNS Search Domain, Network Adapter IP: DNS Search Domain is a trusted-network signal because corporate networks commonly push recognizable suffixes to endpoints.

C. Hostname Resolution, DNS Servers, Geo Location: DNS Server criteria identify a trusted network by checking whether the endpoint sees expected internal resolver addresses.