1. To ensure that network traffic conforms to certain predefined constraints.
2. (a) Priority queuing (PRIQ), class-based queuing (CBQ), and Hierarchical Fair-Service Curve (HFSC). (b) Class-based queuing. (c) Hierarchical Fair-Service Curve.
3. No; we can only implement it with third-party packages such as Snort.

4. (a) The Multiple Lan/Wan configuration wizard; (b) the Dedicated Links wizard.
5. Explicit Congestion Notification.
6. The Floating Rules tab.
7. None; we have to manually enable each interface.
8. By navigating to Status | Queues and looking under the Length column.