Workloaded security models are ways of protecting applications, services, and capabilities that run on a cloud resource. Virtual machines, databases, containers, and applications are all considered cloud workloads. There are different types of cloud deployment models, such as public, private, hybrid, and multicloud. Depending on the deployment model, the cloud workload security can vary in terms of responsibility, visibility, and control.
Infrastructure as a service (IaaS) is a cloud deployment model where the cloud provider offers the basic computing infrastructure, such as servers, storage, and networking, as a service. The customer is responsible for installing, configuring, and managing the operating systems, applications, and security of the workloads that run on the cloud infrastructure. IaaS provides the customer with more flexibility and control over the workload security, but also more complexity and overhead.
On-premises is a deployment model where the customer owns and operates the entire IT infrastructure, including the hardware, software, and security. The customer has full responsibility and control over the workload security, but also the highest cost and maintenance. On-premises deployment can offer more security and compliance than cloud deployment, depending on the customer's security posture and practices.
References:
https://www.cisco.com/site/us/en/products/security/secure-workload/index.html
https://www.checkpoint.com/cyber-hub/cloud-security/what-is-cloud-workload-security/

GETVPN and IPsec are both VPN technologies that use ESP (Encapsulating Security Payload) to encrypt and authenticate data packets. However, they differ in the following aspects:
* GETVPN uses a group IPSec security paradigm, which means that all group members share the same IPSec SA (Security Association) and can communicate with each other without having to establish point-to-point tunnels. IPsec, on the other hand, uses a pair-wise IPSec security paradigm, which requires each pair of devices to negotiate and maintain their own IPSec SAs and tunnels.
* GETVPN uses GDOI (Group Domain of Interpretation) as a key management protocol, which allows a Key Server (KS) to distribute the encryption keys and policies to all group members. IPsec uses IKE (Internet Key Exchange) as a key management protocol, which involves two phases of negotiation between each pair of devices to establish the IPSec SAs.
* GETVPN supports multicast traffic without the need for GRE (Generic Routing Encapsulation) tunneling, as it preserves the original IP header of the packet. IPsec does not support multicast traffic natively, and requires GRE tunneling to encapsulate the multicast packets with a new IP header.
* GETVPN relies on the underlying WAN routing to deliver the encrypted packets to the destination, as it does not create any overlay routing. IPsec creates an overlay routing, which may introduce additional latency and complexity.
References :=
Some possible references are:
* [Implementing and Operating Cisco Security Core Technologies (SCOR) v1.0], Module 6: Secure Connectivity, Lesson 6.2: Implementing Site-to-Site VPNs, Topic 6.2.2: Group Encrypted Transport VPN
* Group Encrypted Transport VPN (GETVPN)
* GETVPN - Cisco Community
* Cisco Get VPN vs DMVPN: Difference and Comparison
* What is a difference between GETVPN and IPsec?
ExplanationDiffie Hellman (DH) uses a private-public key pair to establish a shared secret, typically a symmetric key. DH is not a symmetric algorithm - it is an asymmetric algorithm used to establish a shared secret for a symmetric key algorithm.

The RADIUS Change of Authorization (CoA) feature provides a mechanism to change the attributes of an authentication, authorization, and accounting (AAA) session after it is authenticated.
The RADIUS Change of Authorization (CoA) feature provides a mechanism to change the attributes of an authentication, authorization, and accounting (AAA) session after it is authenticated.
Reference:
sy-book/sec-rad-coa.html
The RADIUS Change of Authorization (CoA) feature provides a mechanism to change the attributes of an authentication, authorization, and accounting (AAA) session after it is authenticated.
sy-book/sec-rad-coa.html