Exam 350-401 topic 1 question 93 discussion

What are two benefits of virtual switching when compared to hardware switching? (Choose two.) A. increased MTU size ==> WRONG, can be modified on both types B. VM-level isolation ==> WRONG, please see explanation below marked * C. extended 802.1Q VLAN range ==> WRONG VLAN Range is defined by protocol not switch type D. hardware independence ==> CORRECT, hence virtual E. increased flexibility ==> CORRECT, have you ever added 52 ports to a physical switch with just a few clicks and no purchase orders and lots of approvals for money ? ?? * Explanation What is VM based isolation? Image result for what is vm-level isolation virtual switch A VM is an isolated environment with access to a subset of physical resources of the computer system. Each VM appears to be running on the bare hardware, giving the appearance of multiple instances of the same computer, though all are supported by a single physical system.

Provided answer is correct

B is not right , because even though VM-level isolation is correct, this is hardly a benefit: if you have multiple VMs every switch has to be configured individually ( Official Cert guide , Chapter 27, p 798

VLANs and Private VLANs aren't exclusive features of virtual switches, physical switches provide the same level of isolation and security.

B & E are correct https://www.rcrwireless.com/20180328/fundamentals/physical-switches-vs-virtual-switches#:~:text=Virtual%20switches%20have%20benefits%20as%20well%20as%20virtual%20machines%20attached%20to%20them.%20They%20boost%20security%20by%20leveraging%20isolation https://www.techtarget.com/searchitoperations/definition/virtual-switch#:~:text=Ability%20to%20isolate.%20Private%20virtual%20switches%20can%20completely%20isolate%20the%20VM%2C%20which%20is%20useful%20for%20carrying%20out%20different%20tests%20in%20an%20isolated%20environment.

D & E are correct

B and E make the most sense - IMO

Vote for BE

B. VM-level isolation: Virtual switching enables isolation at the level of virtual machines (VMs), allowing for better security and network segmentation within a single physical infrastructure. E. Increased flexibility: Virtual switching offers more flexibility in managing and configuring networks since it operates at a software level, allowing for easier changes and adaptations compared to hardware-based solutions.

Hi, I don't think hardware independence is one of the benefits, clearly the Official Certification book says "virtual switch (vSwitch) A software-based Layer 2 switch that operates like a physical Ethernet switch and enables VMs to communicate with each other within a virtualized server and with external physical networks using physical network interface cards (pNICs)"

BE are correct D - hardware independence - vswitch still require Nic card to communicate to external

you have to remember that vm-level isolation is a buzzword definition, defined not to include networking specifically. then DE become obvious. so thank you exam topics people for point that out!

this is one of the questions I really hate Cisco for. you can make a case for BE and DE. i think we are supposed to choose DE, but who knows....

B. VM-level isolation: Virtual switching provides VM-level isolation, which allows each VM to operate as if it has its own dedicated switch port. This enables VMs to be more secure and improves overall network performance. E. Increased flexibility: Virtual switching offers increased flexibility in terms of network configuration and management, allowing administrators to more easily provision, manage, and modify virtual networks to meet changing business needs. It also allows for more efficient use of hardware resources, reducing costs and improving scalability. Option D is partially correct, but hardware independence is not necessarily a benefit of virtual switching, as hardware switching can also provide independence from specific hardware platforms.

Logically, BDE are correct B: we can isolate VMs in vlans using vSwitches D: since vSwitches are virtual, they are really independent from hardware E: since vSwitches are virtual, they are extremely flexible to scale and to manage

B - VM-level isolation E - increased flexibility

B and D are correct.