Connection Admission Control

Connection Admission Control

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Connection Admission Control (CAC) is a network configuration protocol used in packet-switched network connections to manage network resources and prevent network congestion. CAC is typically used in Asynchronous Transfer Mode (ATM) networks, Multiprotocol Label Switching (MPLS) networks, and various types of telecommunications and computer networks.

The main role of CAC is to decide whether to accept or reject a new connection request based on the current load of the network and the potential impact of the new connection on the quality of service (QoS) of the existing connections. If the new connection could potentially degrade the QoS below acceptable levels, the CAC may reject the connection request.

The implementation of CAC can be complex, as it typically involves a decision-making process that takes into account various parameters such as:

  1. The current load on the network
  2. The quality of service requirements of the new connection (e.g., bandwidth, delay, jitter, packet loss)
  3. The priority level of the new connection compared to existing connections
  4. The network’s capacity and current state

CAC plays a critical role in preventing network congestion and ensuring that quality of service commitments can be met, especially in networks that handle real-time traffic with strict QoS requirements, such as VoIP (Voice over IP) or video conferencing services. By controlling network traffic in this way, CAC can help to optimize network performance and reliability.

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