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Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) · Cisco
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We configure Layer 3 point to point links for fast convergence in Core Layer
remember that teh core layer hates STP, as well as anything that may otherwise hinder convergence. hence, quick convergence is one of its key priorities
A. provide QoS prioritization services such as marking, queueing, and classification for critical network traffic. Distribution layer. B. provide redundant Layer 3 point-to-point links between the core devices for more predictable and faster convergence. Core Layer. C. provide advanced network security features such as 802.1X, DHCP snooping, VACLs, and port security. Access Layer. D. provide redundant aggregation for access layer devices and first-hop redundancy protocols such as VRRP. Distribution layer. https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Campus/HA_campus_DG/hacampusdg.html