Cisco Updated 300-440 Exam Questions and Answers by arran

• Display the time and process information of the device, as well as CPU, memory, and disk usage data. = show sdwan system status1
• Validate the configured zone-based firewall. = show policy-firewall config1
• Display information about application-aware routing policy matched packet counts on the Cisco IOS XE SD-WAN devices. = show sdwan policy app-route-policy-filter1
• View the security information that is configured for IPsec tunnel connections. = show sdwan security-info

The commands used to identify issues on a Cisco IOS XE SD-WAN device are as follows1:

• show sdwan system status: This command is used to display the time and process information of the device, as well as CPU, memory, and disk usage data1.
• show policy-firewall config: This command is used to validate the configured zone-based firewall1.
• show sdwan policy app-route-policy-filter: This command is used to display information about application-aware routing policy matched packet counts on the Cisco IOS XE SD-WAN devices1.
• show sdwan security-info: This command is used to view the security information that is configured for IPsec tunnel connections1.

References :=

• Cisco IOS XE Catalyst SD-WAN Qualified Command Reference
• Cisco Catalyst SD-WAN Command Reference
• Cisco Catalyst SD-WAN Systems and Interfaces Configuration Guide, Cisco IOS XE
• SD-WAN Tunnel Interface Commands - Cisco

A fully meshed topology with SD-WAN technology, using dynamic routing and BGP as the routing protocol, meets the requirements of the company because it provides the following benefits:

• It allows direct and secure connectivity between any two branch offices, without the need for a central hub or intermediary devices12. This reduces the latency and improves the performance of the critical business applications.
• It leverages SD-WAN technology to optimize the traffic flow and application quality of service (QoS) across the WAN13. SD-WAN can dynamically select the best path for each application based on the network conditions and policies13. SD-WAN can also provide redundancy, security, and visibility for the WAN13.
• It uses dynamic routing and BGP as the routing protocol to exchange routing information and establish connectivity between the branch offices14. BGP is a scalable and flexible protocol that can support multiple address families, such as IPv4 and IPv6, and multiple routing policies, such as local preference and route filtering14. BGP can also enable seamless integration with the cloud service providers (CSPs) and internet service providers (ISPs)14.

References :=

• 1: Designing and Implementing Cloud Connectivity (ENCC, Track 1 of 5) (Cisco U. login required)
• 2: Cisco SD-WAN Design Guide

 Security groups are a feature in AWS that allow you to control the inbound and outbound traffic to your instances. They act as a virtual firewall that can filter the traffic based on the source, destination, protocol, and port. You can assign one or more security groups to your instances, and each security group can have multiple rules. Security groups are stateful, meaning that they automatically allow the response traffic for any allowed inbound traffic, and vice versa. Security groups are essential for securing your nodes in the AWS EKS cluster, as they can prevent unauthorized access to your Mongo Atlas database or other resources. You can also use security groups to isolate your nodes from other instances in the same VPC or subnet, or to allow communication between nodes in different clusters or regions. References :=

• AWS Security Groups
• Security Groups for Your VPC
• Security Groups for Your Amazon EC2 Instances
• Security Groups for Your Amazon EKS Cluster

 A centralized data policy is a policy that is applied to all devices in the overlay network, regardless of the site list. A localized data policy is a policy that is applied only to the devices that are listed in the site list. In this case, the network engineer wants to apply the policy to all devices in the overlay network, not just the specific devices in the site list. Therefore, a centralized data policy must be configured on the on-premises Cisco WAN edge router. References :=

• Designing and Implementing Cloud Connectivity (ENCC) v1.0, Module 3: Implementing Cloud Connectivity, Lesson 3: Implementing Cisco SD-WAN Cloud OnRamp for Colocation, Topic: Centralized Data Policy
• [Cisco SD-WAN Cloud OnRamp for Colocation Deployment Guide], Chapter: Configuring Centralized Data Policy