Exam CISSP topic 1 question 167 discussion

This is incorrect. While virtualization can be used in an SDN environment, it's not a core building block. SDN is primarily about separating the control plane from the data plane. SDN building blocks typically include: - SDN Controller: Centralized intelligence for managing network traffic. - Network Devices: Switches, routers, and other hardware that forward traffic based on controller instructions. - Northbound Interface: API for applications to interact with the SDN controller. - Southbound Interface: Protocol for communication between the controller and network devices. These components work together to create a flexible and programmable network. None of the options are entirely accurate.

Bad question and answer is just as bad. I would go with C. cisco-hosted or on-prem setups are going to be setup using VMs. Answer is C...

SDN uses virtualization, but is not MOSTLY composed of VMs. SDN is modelled as a set of client-server relationships with the SDN controller at its core. https://safe.menlosecurity.com/doc/docview/viewer/docNC2DBDD5FD5C050a8f26ba6bbb1be40d084fa0902dd66838758e41d2675edfd35731a53f565ce

OSG - Virtualization extends beyond just servers and networking. Software-defined everything (SDx) refers to a trend of replacing hardware with software using virtualization.

C. The SDN is mostly composed of virtual machines (VM) A Software-defined Network (SDN) is a network architecture that uses software to abstract the underlying physical network infrastructure and provide programmability, flexibility, and control over the network resources. In order to build a SDN, it is necessary to have the network infrastructure composed mostly of virtual machines (VMs) or virtual network functions (VNFs) that are running on top of a physical infrastructure, these VMs or VNFs are the building blocks for the SDN. These virtualized components can be easily moved, scaled, and managed, providing the flexibility and programmability required for a SDN.

D. C. The SDN is mostly composed of virtual machines (VM). - This is wrong statement. SDN has 3 layers and VM is not one of them. a) an infrastructure layer b) a control layer and c) an application layer. SDN technology combined with virtual machines and virtualization of networks provides efficiencies to service providers as well. https://www.ibm.com/cloud/blog/software-defined-networking

With SDN, it's mostly the Orchestrator / controller that's virtualized. Everything else is hardware.

SDN technology combined with virtual machines and virtualization of networks provides efficiencies to service providers as well. With these resources, they can provide distinct network separation and control to customers. https://www.ibm.com/cloud/blog/software-defined-networking

The benefits of DCO may include reduced operational costs, more efficient use of infrastructure, and access to more server, storage or computing capacity on demand. The risks include lack of control over security and disaster recovery, lack of flexibility, problems with SLA fulfillment and vendor lock-in.

Given answer is the best, not a good question (agree with GregP). vManage – Management Dashboard. vEdge – The edge router at branches. vBond – The Orchestrator. vSmart – The Controller. Most of them are VMs.

its a rubbish question, but I'd say the given answer is the best.

I think that it is D: SDN prefer to use virtual memory to use RAM memory because this guarantees flexibility to the applications.