Virtualization Questions 2

Question 1

Explanation

In contrast to type 1 hypervisor, a type 2 hypervisor (or hosted hypervisor) runs on top of an operating system and not the physical hardware directly. A big advantage of Type 2 hypervisors is that management console software is not required. Examples of type 2 hypervisor are VMware Workstation (which can run on Windows, Mac and Linux) or Microsoft Virtual PC (only runs on Windows).

Question 2

Explanation

Hypervisors provide virtual switch (vSwitch) that Virtual Machines (VMs) use to communicate with other VMs on the same host. The vSwitch may also be connected to the host’s physical NIC to allow VMs to get layer 2 access to the outside world.

Each VM is provided with a virtual NIC (vNIC) that is connected to the virtual switch. Multiple vNICs can connect to a single vSwitch, allowing VMs on a physical host to communicate with one another at layer 2 without having to go out to a physical switch.

 

-> Therefore answer B is correct.

Answer E is not correct as besides the virtual switch running as a separate virtual machine, we also need to set up a trunk link so that VMs can communicate.

Answer C is not correct as it is too complex when we want to connect two VMs on the same hypervisor. VXLAN should only be used between two VMs on different physical servers.

Answer D is not correct as it uses Layer 3 network (routed link).

Therefore only answer A is left. We can connect two VMs via a trunk link with an external Layer2 switch.

Question 3

Explanation

There are two types of hypervisors: type 1 and type 2 hypervisor.

In type 1 hypervisor (or native hypervisor), the hypervisor is installed directly on the physical server. Then instances of an operating system (OS) are installed on the hypervisor. Type 1 hypervisor has direct access to the hardware resources. Therefore they are more efficient than hosted architectures. Some examples of type 1 hypervisor are VMware vSphere/ESXi, Oracle VM Server, KVM and Microsoft Hyper-V.

In contrast to type 1 hypervisor, a type 2 hypervisor (or hosted hypervisor) runs on top of an operating system and not the physical hardware directly. A big advantage of Type 2 hypervisors is that management console software is not required. Examples of type 2 hypervisor are VMware Workstation (which can run on Windows, Mac and Linux) or Microsoft Virtual PC (only runs on Windows).

Question 4

Explanation

Each VM is provided with a virtual NIC (vNIC) that is connected to the virtual switch. Multiple vNICs can connect to a single vSwitch, allowing VMs on a physical host to communicate with one another at layer 2 without having to go out to a physical switch.

 

Question 5

Explanation

There are two types of hypervisors: type 1 and type 2 hypervisor.

In type 1 hypervisor (or native hypervisor), the hypervisor is installed directly on the physical server. Then instances of an operating system (OS) are installed on the hypervisor. Type 1 hypervisor has direct access to the hardware resources. Therefore they are more efficient than hosted architectures. Some examples of type 1 hypervisor are VMware vSphere/ESXi, Oracle VM Server, KVM and Microsoft Hyper-V.

In contrast to type 1 hypervisor, a type 2 hypervisor (or hosted hypervisor) runs on top of an operating system and not the physical hardware directly. A big advantage of Type 2 hypervisors is that management console software is not required. Examples of type 2 hypervisor are VMware Workstation (which can run on Windows, Mac and Linux) or Microsoft Virtual PC (only runs on Windows).

Type 1 is more efficient and well performing, it is also more secure than type 2 because the flaws and vulnerabilities that are endemic to Operating Systems are often absent from Type 1, bare metal hypervisors. Type 1 has better performance, scalability and stability but supported by limited hardware.

Question 6

Explanation

Static routes directly between VRFs are not supported so we cannot configure a direct static route between two VRFs.

The command “ip route vrf Customer1 172.16.1.0 255.255.255.0 172.16.1.1 global” means in VRF Customer1, in order to reach destination 172.16.1.0/24 then we uses the next hop IP address 172.16.1.1 in the global routing table. And the command “ip route 192.168.1.0 255.255.255.0 Vlan10” tells the router “to reach 192.168.1.0/24, send to Vlan 10”.

Question 7

Explanation

This question is a bit unclear but it mentioned about “dedicated operating systems that provide the virtualization platform” -> It means the Hypervisor so “Type 1 hypervisor” is the best choice here as type 1 hypervisor does not require to run any underlay Operating System.

Note: Hosted virtualization is type 2 hypervisor. In contrast to type 1 hypervisor, a type 2 hypervisor (or hosted hypervisor) runs on top of an operating system and not the physical hardware directly. A big advantage of Type 2 hypervisors is that management console software is not required. Examples of type 2 hypervisor are VMware Workstation (which can run on Windows, Mac and Linux) or Microsoft Virtual PC (only runs on Windows).