Juniper Updated JN0-232 Exam Questions and Answers by lily-may

The packet processing order in SRX with NAT and policies is:

Destination NAT (applies first, for inbound traffic).

Security Policy Evaluation (after destination NAT, before source NAT).

Source NAT (applies last, for outbound traffic).

Option A: Incorrect. Policies are not evaluated before destination NAT.

Option B: Correct. Security policies are evaluated before source NAT but after destination NAT. So in terms of order, policies are processed prior to source NAT.

Option C: Incorrect. Policies are not evaluated before source NAT — they are evaluated before source NAT is applied .

Option D: Correct. Policies are evaluated after destination NAT .

Correct Statements: B and D

From the exhibit:

The user attempted to access https://www.wikipedia.org.

The block page indicates:

CATEGORY: NG_Reference

REASON: BY_PRE_DEFINED

The header states: “Juniper Web Filtering has been set to block this site.”

Analysis of options:

Option A: Correct. The log shows “REASON: BY_PRE_DEFINED,” which means the site was blocked because it matched a predefined category in the Web filtering database.

Option B: Correct. The category “NG_Reference” indicates that the NextGen (Enhanced/Cloud-based) Web Filtering type is being used.

Option C: Incorrect. The exhibit does not provide any information about SSL proxy configuration; it only shows that the HTTPS site was blocked.

Option D: Incorrect. The block page shown is the standard Juniper default block page, not a custom message.

Correct Statements: The URL matches a predefined Web filtering category, and the NextGen Web Filtering type is being used.

A functional zone is used for special purposes, such as management interfaces. Juniper documentation states that currently only the management (MGT) functional zone is supported, which makes option A correct. The management functional zone is used for dedicated management interfaces and can be configured with host-inbound-traffic and screen options to protect management access, which makes option D correct. Option B is incorrect because functional zones are not groups of logical interfaces belonging to multiple security zones; they are special-purpose zones. Option C is incorrect because Juniper specifically states that the management functional zone cannot be specified in security policies, and traffic entering the management zone does not match policies.

Interface-based source NAT uses the outgoing interface address as the translated source address and commonly relies on Port Address Translation to allow many internal hosts to share that single interface IP address. Juniper describes source NAT as translating private addresses to public routable addresses and specifically supports translating many addresses to a single address or smaller address block using port translation. Static NAT is a fixed one-to-one mapping and does not normally perform PAT. Source NAT with address shifting maps one address block to another and is not the interface overload method. Destination NAT without port forwarding changes the destination address, not the source address and port for outbound sharing.