In networking and systems integration, what is the best definition of an extranet for controlled partner access to company information?

Introduction / Context:
Organizations extend selected systems to trusted external parties (customers, vendors, partners) using secure, Internet-based technologies. This controlled extension is known as an extranet.

Given Data / Assumptions:

• Audience includes external stakeholders needing limited, role-based access.
• Security and segregation of duties are essential.
• Technologies include VPN, SSO, and web portals.

Concept / Approach:
An extranet exposes specific services or data using Internet protocols while enforcing strict access controls and auditing. It differs from an intranet (internal users) and the public Internet (open access).

Step-by-Step Solution:

Verification / Alternative check:
Standards-based network architectures and security policies define extranets as partner-access portals with least-privilege access.

Why Other Options Are Wrong:
Unlimited access violates least privilege.
Internal users refer to an intranet, not an extranet.

Common Pitfalls:
Confusing extranet with VPN-only access; VPN may be one mechanism but the concept is broader and policy-driven.

Final Answer:
The use of Internet protocols with limited access to company data by the company's customers and suppliers.