What are three ways communication networks provide admission control?

The correct answer highlights three important components involved in establishing admission control within communication networks.

Admission control protocols play a crucial role by determining whether new traffic flows should be accepted into the network based on current network conditions and resource availability. These protocols help maintain the quality of service by ensuring that the network does not become overloaded with too many simultaneous connections.

Authentication mechanisms are essential for verifying the identity of users or devices attempting to access the network. By ensuring that only authorized users can connect, these mechanisms reduce the risk of unauthorized access and potential network congestion caused by unverified sources.

Access Control Lists (ACLs) are utilized to define permissions and control the types and volumes of traffic that are allowed into the network. They act as a filter, ensuring that only the specified types of traffic can enter or exit the network, thereby aiding in managing resources effectively and preventing abuse.

Collectively, these elements serve to manage and regulate access to network resources, ensuring that performance remains stable and reliable.