Implementing a functional Internetwork poses many challenges. These challenges fall into four major categories:

Connectivity — The challenge of connectivity is to support communication between disparate technologies, such as different media types or speeds.

Security

Reliability — Reliable service is a must in any Internetwork. Individual users and whole organizations are dependent on getting consistent, reliable access to network resources.

Security

Management — Network management must provide centralized support and troubleshooting capabilities in an Internetwork. Configuration, security, performance, and other issues must be adequately addressed in order for the Internetwork to function smoothly.

Security

Flexibility — Flexibility is a necessity in the face of network expansion, new applications and services, and other such factors.

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