Exam 300-320 topic 1 question 164 discussion

https://tools.ietf.org/html/rfc2998#page-7 will this help maybe seems to point to admission control in some way

Admission control Resource Reservation It provides a way to deliver the end-to-end Quality of Service (QoS) that real-time applications require by explicitly managing network resources to provide QoS to specific user packet streams (flows). It uses resource reservation and admission control mechanisms as key building blocks to establish and maintain QoS. https://www.cisco.com/c/en/us/products/ios-nx-os-software/resource-reservation-protocol-rsvp/index.html

IntServ provides hard QoS guarantees such as bandwidth, delay, and packet-loss rates end to end. These guarantees ensure both predictable and guaranteed service levels for applications. There will be no effect on traffic when guarantees are made because QoS requirements are negotiated on establishment of the connection, and Connection Admission Control (CAC) ensures that no new traffic will violate existing guaran- tees. (ARCH 300-320 book)

Admission control Resource Reservation https://www.cisco.com/c/en/us/products/ios-nx-os-software/resource-reservation-protocol-rsvp/index.html