Authentic Cisco Certification Exam 500-490 Questions Answers

Cisco ISE is a security policy management platform that provides secure access to network resources. Cisco ISE functions as a policy decision point and enables enterprises to ensure compliance, enhance infrastructure security, and streamline service operations1. Two of the statements that are true regarding Cisco ISE are:

• ISE can detect endpoints whose addresses have been translated via NAT: Cisco ISE can discover, profile, and monitor the endpoint devices on the network, and classify them according to their associated policies and identity groups. Cisco ISE can leverage the pxGrid framework to share the contextual information with other security tools and platforms, and enhance the network visibility and security1. Cisco ISE can also detect endpoints whose addresses have been translated via NAT by using various methods, such as passive and active discovery, NMAP scanning, DHCP snooping, and RADIUS accounting234.
• The number of logs that ISE can retain is determined by your disk space: Cisco ISE provides a logging mechanism that is used for auditing, fault management, and troubleshooting. The logging mechanism helps you to identify fault conditions in deployed services and troubleshoot issues efficiently. You can configure your Cisco ISE node to collect the logs in the local systems using a virtual loopback address5. The number of logs that ISE can retain is determined by your disk space, as well as the data purging settings that you can configure under Administration > System > Maintenance > Data Purging6. You can also configure Cisco ISE to send its logs to a remote system for greater retention history7.

The other statements are not true regarding Cisco ISE, because:

• In distributed deployments, failover from primary to secondary Policy Administration Nodes happens automatically: Cisco ISE supports high availability for the Administration persona, which provides centralized configuration and management of the distributed deployment. You can configure one primary Administration ISE node and one secondary Administration ISE node for high availability. However, the failover from primary to secondary Policy Administration Nodes does not happen automatically, unless you enable the automatic failover feature and configure a health check node to monitor the primary node’s status8. Otherwise, you have to manually promote the secondary node to become the primary node in case of a failure9.
• In two-node standalone ISE deployments, failover must be done manually: Cisco ISE supports high availability for the Policy Service persona, which provides network access, posture, guest access, client provisioning, and profiling services. You can configure multiple Policy Service Nodes (PSNs) in a node group to provide session failover and load balancing for the endpoints. In a two-node standalone ISE deployment, where each node assumes all the personas, the failover for the Policy Service persona does not need to be done manually, as long as the network access devices are configured to use both nodes for RADIUS and TACACS services10.
• ISE supports IPv6 downloadable ACLs: Cisco ISE supports downloadable ACLs (DACLs), which are configured and implemented through authorization profiles. DACLs are used to enforce granular access control policies for the endpoints based on their identity and other attributes. However, Cisco ISE does not support IPv6 downloadable ACLs, as it only supports IPv4 ACLs for RADIUS and TACACS protocols1112.

References:

1: Cisco Content Hub - Cisco ISE Features 2: Cisco ISE Profiler Service Overview 3: ISE Deployment through NAT Boundaries - Cisco Community 4: Configure ISE 3.3 Native IPSec to Secure NAD (IOS-XE) Communication - Cisco 5: Logging [Cisco Identity Services Engine] - Cisco Systems 6: ISE maximum logging time / data retention - Cisco Community 7: Logs retention on ISE - Cisco Community 8: Cisco Identity Services Engine Administrator Guide, Release 2.4 9: Setting Up Cisco ISE in a Distributed Environment 10: Cisco Content Hub - Network Deployments in Cisco ISE 11: Cisco Identity Services Engine Administrator Guide, Release 2.2 12: Solved: ISE: support for IPv6 DACL’s - Cisco Community

= Border nodes are the component of the SD-Access fabric that is responsible for communicating with networks that are external to the fabric. Border nodes serve as the gateway between the fabric domain and the network outside of the fabric. Border nodes are responsible for network virtualization inter-working and SGT propagation from the fabric to the rest of the network1. Border nodes also perform LISP Proxy Tunnel Router (PxTR) functions, which convert policy and reachability information, such as SGT and VRF information, from one domain to another2. Border nodes can connect to internal networks, such as data center or WAN, or external networks, such as internet or cloud3.

Edge nodes, control plane nodes, and intermediate nodes are not responsible for communicating with networks that are external to the fabric. Edge nodes are the access-layer switches where all of the endpoints reside. Edge nodes detect clients and register them with the control plane nodes. Edge nodes also provide an anycast L3 gateway for the connected endpoints and perform encapsulation and de-encapsulation of data traffic4. Control plane nodes are the devices that run a host tracking database to map location information. Control plane nodes receive endpoint ID map registrations from edge and/or border nodes and resolve lookup requests from edge and/or border nodes to locate destination endpoint IDs5. Intermediate nodes are the devices that provide underlay connectivity between edge nodes and border nodes. Intermediate nodes do not participate in the fabric overlay and do not have any fabric roles6.

References :=

• Role of Fabric Border Node & IS-IS protocol in Cisco SD-Access
• Software Defined Access Network Fabric Roles - Study CCNP
• Cisco SD-Access
• SD-Access Fabric Troubleshooting Guide - Cisco
• Cisco SD-Access Solution Design Guide (CVD) - Cisco
• Cisco SD-Access Solution Design Guide (CVD) - Cisco
• Cisco SD-Access Solution Design Guide (CVD) - Cisco

Cisco ISE is a policy decision point that enables enterprises to ensure compliance, enhance infrastructure security, and streamline service operations. Some features and benefits of Cisco ISE include1:

• Zero trust across the network: ISE allows only trusted users and devices access to resources on your network. It also uses intel to automatically identify, classify and profile devices.
• Policy and lifecycle management: ISE simplifies the delivery of consistent, highly secure access control across wired, wireless, and VPN connections. It also allows users to add and manage their own devices through self-service portals.
• Remote management and deployment: ISE supports cloud-based deployment and management, as well as integration with other Cisco products and third-party solutions.
• Site survivability: ISE provides local authentication and authorization services for remote sites, even when the connection to the central ISE server is lost.
• Visibility of all devices and their users: ISE can provide data about when a specific device connected to the network, what type of device it is, who is using it, what applications are running on it, and where it is located.

Among these features, two statements are true regarding Cisco ISE:

• ISE plays a critical role in SD-Access: SD-Access is a network architecture that uses software-defined networking (SDN) principles to create a secure, scalable, and consistent network fabric. ISE is the policy engine that defines and enforces the network segmentation and access policies for SD-Access2.
• ISE can provide data about when a specific device connected to the network: ISE uses a number of probes to collect attributes for all endpoints on the network, and pass them to the Profiler analyzer, where the known endpoints are classified according to their associated policies and identity groups. ISE can also provide historical data about the endpoint connections, such as the time, duration, location, and user of the connection3.

The other three statements are false regarding Cisco ISE:

• The major business outcomes of ISE are enhanced user experience and secure VLAN segmentation: ISE provides more than just user experience and VLAN segmentation. It also delivers business outcomes such as improved network performance, reduced operational costs, increased security, and simplified compliance4.
• An ISE deployment requires only a Cisco ISE network access control appliance: ISE can be deployed on different platforms, such as physical appliances, virtual machines, or cloud services. An ISE deployment also requires other components, such as network devices, endpoints, and external identity sources5.
• Without integration with any other product, ISE can track the actual physical location of a wireless endpoint as it moves: ISE can provide the location information of an endpoint based on the network device that it is connected to, such as the switch port or the wireless access point. However, to track the actual physical location of a wireless endpoint as it moves, ISE needs to integrate with other products, such as Cisco DNA Center, Cisco Connected Mobile Experiences (CMX), or Cisco Wireless LAN Controller (WLC)6.

References:

Cisco Content Hub - Cisco ISE Features1 : Cisco SD-Access Solution Design Guide (CVD) - Cisco2 : Cisco ISE Network Discovery3 : Cisco Identity Services Engine (ISE) - Cisco4 : Cisco Identity Services Engine Hardware Installation Guide, Release 2.7 - Cisco ISE Deployment [Cisco Identity Services Engine] - Cisco5 : Cisco Identity Services Engine Administrator Guide, Release 2.7 - Configure Location Mapping [Cisco Identity Services Engine] - Cisco6