Explanation

SSL Decryption is an important part of the Umbrella Intelligent Proxy. he feature allows the Intelligent Proxy to go beyond simply inspecting normal URLs and actually proxy and inspect traffic that’s sent over HTTPS. The SSL Decryption feature does require the root certificate be installed.

Cisco Umbrella and Cisco Duo Security are two solutions that help combat social engineering and phishing at the endpoint level. Cisco Umbrella is a cloud-based security platform that provides DNS-layer security, web filtering, and threat intelligence to protect users from malicious websites and domains. Cisco Duo Security is a multi-factor authentication (MFA) solution that verifies the identity of users and the health of their devices before granting access to applications. Both solutions help prevent attackers from compromising endpoints and stealing credentials or data through phishing or other social engineering techniques. References:

Cisco Umbrella

Cisco Duo Security

Implementing and Operating Cisco Security Core Technologies (SCOR) - Module 3: Cloud and Content Security

At the solution-architecture level, the exporter is the NetFlow-enabled Cisco IOS device that examines packets, groups packets sharing the configured flow keys, maintains counters in its flow cache, and exports completed flow records. Therefore, D is correct. More precisely, within Flexible NetFlow, a flow monitor and its cache perform local packet classification and aggregation, while the configured flow-exporter component transmits the resulting records. The question uses “exporter” to represent the originating NetFlow device rather than only the IOS configuration object. A collector receives and stores exported records, while an analyzer interprets those records for monitoring, reporting, or security investigation. A sampler reduces the number of packets examined according to a configured sampling method; it does not aggregate all matching packets into flow records. Cisco Flexible NetFlow overview

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A Cisco ISE downloadable ACL is delivered as part of RADIUS authorization using Cisco vendor-specific attributes. The switch must therefore be enabled to process authentication VSAs with radius-server vsa send authentication, making D correct. The exhibit already contains switchport mode access, so B adds nothing. ip access-group ACL-NAME out applies a locally configured static ACL and does not enable ISE to download a per-session ACL. authentication order mab dot1x changes the order of endpoint authentication methods; it does not enable dACL delivery. Cisco’s documented ISE switch configuration guidance describes radius-server vsa send authentication as the command that enables authentication vendor-specific attributes. Once the switch accepts the Cisco AV-pairs returned by ISE, it can request and apply the authorized dACL dynamically to the authenticated session.

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Explanation

Explanation

How To Troubleshoot ISE Failed Authentications & Authorizations

Check the ISE Live Logs

Login to the primary ISE Policy Administration Node (PAN).

Go to Operations > RADIUS > Live Logs

(Optional) If the event is not present in the RADIUS Live Logs, go to Operations > Reports > Reports >

Endpoints and Users > RADIUS Authentications

Check for Any Failed Authentication Attempts in the Log

Explanation

To understand DHCP snooping we need to learn about DHCP spoofing attack first.

DHCP spoofing is a type of attack in that the attacker listens for DHCP Requests from clients and answers them with fake DHCP Response before the authorized DHCP Response comes to the clients. The fake DHCP Response often gives its IP address as the client default gateway - > all the traffic sent from the client will go through the attacker computer, the attacker becomes a “man-in-the-middle”.

The attacker can have some ways to make sure its fake DHCP Response arrives first. In fact, if the attacker is “closer” than the DHCP Server then he doesn’t need to do anything. Or he can DoS the DHCP Server so that it can’t send the DHCP Response.

DHCP snooping can prevent DHCP spoofing attacks. DHCP snooping is a Cisco Catalyst feature that

determines which switch ports can respond to DHCP requests. Ports are identified as trusted and untrusted.

Only ports that connect to an authorized DHCP server are trusted, and allowed to send all types of DHCP

messages. All other ports on the switch are untrusted and can send only DHCP requests. If a DHCP response

is seen on an untrusted port, the port is shut down.

When a transparent authentication fails on the Web Security Appliance (WSA), the end user gets blocked access. This means that the user cannot access any web resources until they successfully authenticate. The WSA can use different methods to authenticate users transparently, such as Transparent User Identification (TUI), Transparent Identification, or Kerberos1. If none of these methods work, the WSA will send a block page to the user with a message explaining why the authentication failed and how to resolve the issue2. The block page can be customized by the administrator to provide more information or instructions to the user3.

References := 1: Implementing and Operating Cisco Security Core Technologies (SCOR) v1.0, Module 4: Securing the Cloud, Lesson 4.3: Cloud Application Security, Topic 4.3.2: Cisco Umbrella, page 4-59. 2: User Guide for AsyncOS 12.5 for Cisco Web Security Appliances - GD (General Deployment), Chapter: Acquire End-User Credentials, Topic: Failed Authentication Credentials, page 4-67. 3: User Guide for AsyncOS 12.5 for Cisco Web Security Appliances - GD (General Deployment), Chapter: Customize End-User Notifications, Topic: Customize Block Pages, page 5-1.

The aaa server radius dynamic-author command enables authentication, authorization, and accounting (AAA) globally on the device so that Change of Authorization (CoA) is supported. CoA is a feature that allows an external AAA server to dynamically change the attributes of a user session after it is authenticated. For example, the AAA server can send a CoA request to reauthenticate a user, terminate a session, or apply a new policy. The aaa server radius dynamic-author command specifies the IP address and port number of the device that listens for CoA requests from the AAA server. The command also configures the shared secret key that is used to encrypt the communication between the device and the AAA server12. References := 1: Implementing and Operating Cisco Security Core Technologies (SCOR) v1.0, Module 3: Securing Networks with Cisco Firepower Next Generation Firewall, Lesson 3.2: Deploying Cisco Firepower Next-Generation Firewall, Topic 3.2.2: Cisco Firepower NGFW Device Management 2: Authentication, Authorization, and Accounting Configuration Guide, Cisco IOS Release 15SY - RADIUS Change of Authorization [Support] - Cisco3

URL conditions in access control rules allow you to limit the websites that users on your network can access. This feature is called URL filtering. There are two ways you can use access control to specify URLs you want to block (or, conversely, allow):

– With any license, you can manually specify individual URLs, groups of URLs, and URL lists and feeds to achieve granular, custom control over web traffic.

– With a URL Filtering license, you can also control access to websites based on the URL’s general

classification, or category, and risk level, or reputation. The system displays this category and reputation data in connection logs, intrusion events, and application details.

Using category and reputation data also simplifies policy creation and administration. It grants you assurance that the system will control web traffic as expected. Finally, because Cisco’s threat intelligence is continually updated with new URLs, as well as new categories and risks for existing URLs, you can ensure that the system uses up-to-date information to filter requested URLs. Malicious sites that represent security threats such as malware, spam, botnets, and phishing may appear and disappear faster than you can update and deploy new policies.

Northbound APIs (SDN northbound APIs) are typically RESTful APIs that are used to communicate between the SDN controller and the services and applications running over the network. Such northbound APIs can be used for the orchestration and automation of the network components to align with the needs of different applications via SDN network programmability1. The management solution is an example of an application that can use the northbound APIs to interact with the SDN controller and configure, monitor, and troubleshoot the network devices and services2. Therefore, the main function of northbound APIs in the SDN architecture is to enable communication between the SDN controller and the management solution. References: 1: What are SDN Northbound APIs (and SDN Rest APIs)? - SDxCentral 2: Software-Defined Networking Security and Network Programmability

Cisco Tetration is a Cisco security solution that provides patch management in the cloud. Patch management is the process of identifying, acquiring, installing, and verifying patches for products and systems to correct security and functionality problems in software and firmware1. Cisco Tetration is a cloud-native platform that delivers comprehensive workload protection for multicloud data centers by enabling a zero-trust model using segmentation2. One of the features of Cisco Tetration is software vulnerability detection and patch management, which allows users to identify software vulnerabilities on workloads, prioritize patching based on risk scores, and automate patch deployment using orchestration tools3. Cisco Tetration leverages the National Vulnerability Database (NVD) and Cisco Talos Intelligence Group to provide up-to-date information on software vulnerabilities and their severity levels3. Cisco Tetration also supports patch management for both Windows and Linux operating systems, as well as third-party applications such as Apache, Java, MySQL, and Oracle4. Therefore, the correct answer is D. Cisco Tetration. References: 1: RFC 9232: Network Telemetry Framework - Internet Engineering Task Force 2: Cisco Tetration - Workload Protection - Cisco 3: Cisco Tetration Software Vulnerability Detection and Patch Management - Cisco 4: Cisco Tetration Platform Data Sheet - Cisco