An Extranet extends an organization’s internal network to provide controlled access to external users such as suppliers, vendors, and business partners. It uses security mechanisms like authentication and encryption to ensure that only authorized external parties can access the relevant internal resources.

Option A (Intranet): Internal-only network for employees; not accessible to outside users.

Option B (VPN): Provides secure remote connections for users but does not inherently grant controlled access to internal systems for external organizations.

Option C (LAN): A local network limited to internal devices in a small geographic area.

Thus, the correct type of network is an Extranet.