Cisco 300-715 - Implementing and Configuring Cisco Identity Services Engine (SISE) v4.0 (300-715 SISE)

https://learningnetwork.cisco.com/s/blogs/a0D3i000002eeWTEAY/cisco-ios-privilege-levels

Cisco ISE implements an ARP cache in the profiling service, so that you can reliably map the IP addresses and the MAC addresses of endpoints. For the ARP cache to function, you must enable either the DHCP probe or the RADIUS probe. The DHCP and RADIUS probes carry the IP addresses and the MAC addresses of endpoints in the payload data. The dhcp-requested address attribute in the DHCP probe and the Framed-IP-address attribute in the RADIUS probe carry the IP addresses of endpoints, along with their MAC addresses, which can be mapped and stored in the ARP cache.

https://www.cisco.com/c/en/us/td/docs/security/ise/2-1/ admin_guide/b_ise_admin_guide_21/b_ise_admin_guide_20_chapter_010100.html

Central Web Authentication (CWA) is a feature that allows the network access device (NAD) to redirect the web traffic of a guest user to a web portal hosted by Cisco ISE1. The NAD acts as a proxy between the guest user and the ISE node, and performs the authentication and authorization based on the RADIUS attributes returned by ISE1. To configure CWA on ISE, the administrator must create an authorization profile that contains the URL redirection attribute and assign it to the guest user1. The other options are not correct because they do not use CWA. Device registration WebAuth is a feature that allows users to register their devices on ISE before they can access the network2. WLC with local WebAuth is a feature that allows the wireless LAN controller (WLC) to host the web portal and authenticate the guest user locally3. Wired NAD with local WebAuth is a feature that allows the switch to host the web portal and authenticate the guest user locally

In the context of a wired 802.1X deployment with Cisco ISE, the requirement is to log failed authentications while minimizing user impact. Let's analyze each option:

A. authentication open - This command configures the port to allow network access regardless of the authentication state. It's useful in situations where specific devices can't perform 802.1X authentication but should still be allowed network access. However, it doesn't specifically address the logging of failed authentications.

B. pae dot1x enabled - PAE (Port Access Entity) refers to the entity on a network device that enforces access control. This command enables 802.1X on the port, which is a prerequisite for implementing 802.1X, but doesn't directly relate to logging failed authentication attempts.

C. authentication host-mode multi-auth - This command configures the port to allow multiple authenticated sessions. This mode is used when multiple devices are connected to the same port (like in a conference room). While it's relevant for 802.1X environments, it doesn't specifically cater to logging failed authentications or minimizing user impact.

D. monitor-mode enabled - This command is used in the context of 802.1X to enable Monitor Mode on a port. Monitor Mode allows a port to grant limited network access to endpoints without 802.1X capabilities. It's often used to ease the deployment of 802.1X by monitoring the authentication status without fully enforcing access control, thereby minimizing user impact. It also helps in logging authentication attempts, including failures.

Given these options, the most appropriate command for logging failed authentications while having minimal impact on users would be D. monitor-mode enabled. This command ensures that authentication attempts are monitored and logged, including failures, without fully restricting access, thus minimizing the impact on users who might face issues with the authentication process.

Default Endpoint Identity Groups Created for Endpoints

Cisco ISE creates the following five endpoint identity groups by default: Blacklist, GuestEndpoints, Profiled, RegisteredDevices, and Unknown. In addition, it creates two more identity groups, such as Cisco-IP-Phone and Workstation, which are associated to the Profiled (parent) identity group. A parent group is the default identity group that exists in the system.

https://www.cisco.com/c/ en/us/td/docs/security/ise/2-4/admin_guide/b_ise_admin_guide_24/b_ise_admin_guide_24_new_chapter_010101.html#ID1678