Explanation:
Step 1 = Click Configuration, select Templates, and then select Feature Templates. Step 2 = Click Add Template, select the device, and then click Basic Configuration. Step 3 = Shut down the tunnel and then remove the ISAKMP profile. Step 4 = Attach the IKEv2 profile and then run the no shutdown command on the tunnel.
The process of configuring a site-to-site IPsec VPN connection between an on-premises Cisco IOS XE router in Controller mode and AWS, and changing the IKE version from IKEv1 to IKEv2 in Cisco vManage involves several steps123.
Click Configuration, select Templates, and then select Feature Templates: This is the first step where you navigate to the Templates section in the Configuration menu of Cisco vManage1.
Click Add Template, select the device, and then click Basic Configuration: In this step, you add a new template for the device and proceed with the basic configuration1.
Shut down the tunnel and then remove the ISAKMP profile: Before changing the IKE version, you need to shut down the existing tunnel and remove the ISAKMP profile that is configured for IKEv12.
Attach the IKEv2 profile and then run the no shutdown command on the tunnel: Finally, you attach the newly created IKEv2 profile to the tunnel and bring the tunnel back up2.
References :=
Configuring Internet Key Exchange Version 2 (IKEv2) - Cisco
Switch from IKEv1 to IKEv2 on Cisco Routers - Cisco Community
Configure IOS-XE Site-to-Site VPN Connection to Amazon Web Services - Cisco Community

The role of service providers to establish private connectivity between on-premises networks and Google Cloud resources is to facilitate direct, dedicated network connections through Google Cloud Interconnect.
Google Cloud Interconnect is a service that allows customers to connect their on-premises networks to Google Cloud through a service provider partner. This provides low latency, high bandwidth, and secure connectivity to Google Cloud services, such as Google Compute Engine, Google Cloud Storage, and Google BigQuery.
Google Cloud Interconnect also supports hybrid cloud scenarios, such as extending on-premises networks to Google Cloud regions, or connecting multiple Google Cloud regions together. Google Cloud Interconnect offers two types of connections: Dedicated Interconnect and Partner Interconnect. Dedicated Interconnect provides physical connections between the customer's network and Google's network at a Google Cloud Interconnect location. Partner Interconnect provides virtual connections between the customer's network and Google's network through a supported service provider partner. Both types of connections use VLAN attachments to establish private connectivity to Google Cloud Virtual Private Cloud (VPC) networks. References:
Designing and Implementing Cloud Connectivity (ENCC) v1.0
[Google Cloud Interconnect Overview]
[Google Cloud Interconnect Documentation]

Explanation:
Step 1 = Navigate to Configuration, select Templates, and then select Device Templates. Step 2 = Click Create Template, select From Feature Template, and then select the device model. Step 3 = Select Device, select Service Node, and then set Template Name and Description. Step 4 = Attach the device template to the device.
The process of configuring an AppGoE service node for WAN optimization for applications that are hosted in the cloud using Cisco vManage for C8000V or C8500L-8S4X devices involves several steps12.
Navigate to Configuration, select Templates, and then select Device Templates: This is the first step where you navigate to the Templates section in the Configuration menu of Cisco vManage1.
Click Create Template, select From Feature Template, and then select the device model: In this step, you create a new template for the device model from the feature template1.
Select Device, select Service Node, and then set Template Name and Description: After setting up the template, you select the device and the service node, and then set the template name and description1.
Attach the device template to the device: Finally, you attach the created device template to the device1.
References :=
AppQoE - Step-by-Step Configuration - Cisco Community
Cisco Catalyst SD-WAN AppQoE Configuration Guide, Cisco IOS XE Catalyst SD-WAN Release 17.x

Explanation:
Step 1 = Create a Customer Gateway (CGW) in AWS. Step 2 = Create a Virtual Private Gateway (VGW) in AWS. Step 3 = Create a site-to-site VPN connection in AWS. Step 4 = Configure the IOS XE router with the required IPsec VPN parameters and routing settings. Step 5 = Verify and test the VPN connection.
The process of configuring a site-to-site VPN connection between an on-premises Cisco IOS XE router and Amazon Web Services (AWS) involves several steps12.
Create a Customer Gateway (CGW) in AWS: This is the first step where you define the public IP address of your on-premises Cisco IOS XE router in AWS1.
Create a Virtual Private Gateway (VGW) in AWS: This involves creating a VGW and attaching it to the VPC in AWS1.
Create a site-to-site VPN connection in AWS: After setting up the CGW and VGW, you then create a site-to-site VPN connection in AWS. This involves specifying the CGW, VGW, and the static IP prefixes for your on-premises network1.
Configure the IOS XE router with the required IPsec VPN parameters and routing settings: After the AWS side is set up, you configure the on-premises Cisco IOS XE router with the required IPsec VPN parameters and routing settings2.
Verify and test the VPN connection: Finally, you verify and test the VPN connection to ensure that it is working correctly12.
References :=
Configure IOS-XE Site-to-Site VPN Connection to Amazon Web Services - Cisco Community SD-WAN Configuration Example: Site-to-site (LAN to LAN) IPSec between vEdge and Cisco IOS - Cisco Community

A centralized internet gateway is a network design that routes all internet-bound traffic from the on-premises infrastructure through a single point of egress, typically located at the data center or a regional hub1. This approach allows the enterprise to apply consistent security policies and access controls for SaaS applications, as well as optimize the bandwidth utilization and performance of the WAN links2. A centralized internet gateway can use various technologies to provide connectivity to SaaS applications, such as proxy servers, firewalls, web filters, and WAN optimizers3. However, a cloud-based proxy server (option A) is not a part of the centralized internet gateway, but rather a separate service that can be used to route traffic from the on-premises infrastructure to the SaaS provider data center4. VPN connections (option C) and dedicated, private connections (option D) are also not related to the centralized internet gateway, but rather alternative ways of providing secure and reliable access to SaaS applications from the on-premises infrastructure5. Therefore, the correct answer is option B, which describes the basic function of a centralized internet gateway. References := 1: Designing and Implementing Cloud Connectivity (ENCC) v1.0, Module 1:
Cloud Connectivity Overview, Lesson 1: Cloud Connectivity Concepts, Topic: Centralized Internet Gateway 2: Cloud OnRamp for SaaS, Cisco IOS XE Catalyst SD-WAN Release 17.3.1a and Later, Topic:
Centralized Internet Gateway 3: Architect and optimize your internet traffic with Azure routing preference, Microsoft Azure Blog, Topic: Routing via the premium Microsoft global network 4: What is SaaS? Softwareas a Service, Microsoft Azure, Topic: How SaaS works 5: How an application gateway works, Microsoft Learn, Topic: Application gateway components