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Security Fundamentals & Crypto · Intermediate

Cisco Identity Services Engine (Cisco ISE)

Cisco's policy and NAC platform providing RADIUS and TACACS+ AAA, profiling, posture, and guest access.

Definition

ISE authenticates users and devices via 802.1X and MAB, profiles endpoint types, assesses posture, and returns authorization results such as VLANs, downloadable ACLs, and Security Group Tags (TrustSec). It also provides device administration via TACACS+ and shares context with other tools through pxGrid.

Example

ISE assigns SGT 10 to corporate laptops so downstream firewalls can enforce policy by tag.

Exam tip

Know ISE's personas (PAN, MnT, PSN) and that it handles both network access (RADIUS) and device admin (TACACS+).

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