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cisco certification online free.(iii) Session Authorization Phase EAP Success M I Zhu W.-------------------------------------------1[AVP: EAP-Success] i; [AVP: VLAN 10, dACL-n]. Session Accounting Phase RADIUS Accounting-Request [; [SM >RADIUS Accounting-ResponseiFigure 4-19 Protocol messages exchanged between the 3 participating 802.1X devices during the 4 phases of 802.1X port access controlIn addition to the 4 phases mentioned above, it is equally important to terminate the session correctly. In general, the applicant sends out an EAPoL-Logoff message to terminate the session.4.10.3 Network Access Control Lists and Firewall Features Access control lists are a basic implementation of access control. Network ACLs are ACLOs that take effect on network traffic Cisco network devices (such as routers, switches, and firewalls) support the network ACL feature and can be used to control access to network resources. Port-based access control, network ACLs, and firewall functionality are generally considered special cases of the ABAC model, and are sometimes categorized as identity-based or rule-based access control models because implementations of all three access control mechanisms make control decisions based on certain attributes (for example, IP addresses, MAC addresses, or Layer 4 information). Security group ACLs, however, enforce access control based on the role of the subject attempting to access the resource, and such ACLs are categorized as role-based access control models. Network ACLs can be applied to the following layers of the OSI model.Layer 2 ACLs are in effect for data link layer traffic and can perform filtering based on the layer 2 information of the traffic. MAC access lists are Layer 2 ACLs, which perform filtering based on MAC addresses.Layer 3 ACLs are in effect for network layer traffic. Typically, Cisco devices support Layer 3 ACLs to filter traffic at each4.10 Implementation of identity and access control mechanisms 2124.10 Implementation of Identity and Access Control Mechanisms 213