300-710 SNCF Integration Practice Question
An enterprise integrates Cisco Secure Firewall Management Center with Cisco ISE using pxGrid for identity-based access control. The security team notices that user identity mapping works for domain users authenticating via 802.1X, but guest users connecting through a WebAuth portal do not have their user-to-IP mappings populated on the FTD. What is the root cause of this issue?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The pxGrid connection on ISE is not subscribed to the guest session topic, or guest session publishing is disabled in ISE deployment settings.
Guest users authenticated via WebAuth on ISE may not have active pxGrid session directory notifications if the guest profile or ISE profiler service is not configured to publish guest sessions, or if the pxGrid node is not subscribed to guest session topics (such as 'Session Directory' guest events).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
FMC requires an active eStreamer connection to ingest guest identities because pxGrid only supports Active Directory domain accounts.
Why it's wrong here
pxGrid fully supports guest identities as long as the session topic is correctly subscribed.
- ✗
Guest users must manually log into a captive portal hosted on the FTD data plane before ISE can share their identity.
Why it's wrong here
Identity propagation is handled entirely by ISE pxGrid; captive portal on FTD is not required for ISE-authenticated guests.
- ✗
The FTD identity policy must be configured with a RADIUS server group instead of pxGrid to support guest VLANs.
Why it's wrong here
pxGrid is the preferred and fully functional method for consuming ISE identity context for all user types.
- ✓
The pxGrid connection on ISE is not subscribed to the guest session topic, or guest session publishing is disabled in ISE deployment settings.
Why this is correct
Guest sessions require explicit subscription and publishing configurations within ISE pxGrid services to transmit guest IP-to-user bindings.
Quick reference
AAA Protocol Comparison
| Protocol | Port(s) | Encryption | Transport | Primary Use |
|---|---|---|---|---|
| RADIUS | 1812 / 1813 | Password only | UDP | Network access control |
| TACACS+ | 49 | Full packet | TCP | Device administration |
| Diameter | 3868 | Full session | TCP / SCTP | Carrier / mobile networks |
| 802.1X | — | EAP-based | Layer 2 | Port-based access control |
TACACS+ encrypts the entire packet; RADIUS only encrypts the password field — a key exam distinction.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Cisco exam blueprint
This 300-710 SNCF practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-710 SNCF exam.