Cisco CCNP 350-401 ENCOR Device Virtualization: Hypervisors, Virtual Machines, and Virtual Switching Practice Test 2

 

Topic 04 Practice Test 2 covers Device Virtualization: Hypervisors, Virtual Machines, and Virtual Switching for Cisco 350-401 ENCOR. For broader exam preparation, review the Cisco 350-401 ENCOR Exam Dumps. Every option includes focused technical reasoning explaining both the Cisco enterprise networking concept and its fit to the scenario.

Question 1

Security architects want hypervisor administration traffic isolated from ordinary guest application traffic. Which network role should receive the host management interfaces? Choose ONE.

1. VLAN-backed port group
2. Management network
3. East-west traffic
4. Physical NIC uplink

Correct Answer(s)

 

B

Rationale

1. A VLAN-backed port group associates virtual machine interfaces with a configured Layer 2 segment and applies the corresponding VLAN treatment on the virtual switch. For VLAN-backed port group, the mismatch is hypervisor management interfaces should use a distinct network path instead of sharing the ordinary application VLAN; Management network meets that condition instead.
2. Virtualization management interfaces use a dedicated control path so host administration is not unnecessarily exposed on user workload segments. For Management network, the relevant condition is hypervisor management interfaces should use a distinct network path instead of sharing the ordinary application VLAN.
3. East-west traffic flows laterally between workloads such as virtual machines or services rather than entering or leaving the data center through an external boundary. For East-west traffic, the mismatch is hypervisor management interfaces should use a distinct network path instead of sharing the ordinary application VLAN; Management network meets that condition instead.
4. External VM connectivity depends on a physical adapter assigned as a virtual-switch uplink when frames must leave the virtualization host. For Physical NIC uplink, the mismatch is hypervisor management interfaces should use a distinct network path instead of sharing the ordinary application VLAN; Management network meets that condition instead.

 

Question 2

A regulated workload may be virtualized, but its licensing terms require the underlying physical server to be dedicated to one organization. Which hosting choice addresses that physical tenancy requirement? Choose ONE.

1. Hypervisor isolation
2. Anti-affinity placement
3. Type 1 hypervisor
4. Dedicated host

Correct Answer(s)

 

D

Rationale

1. The virtualization boundary enforces separation among guests while mediating their access to shared physical CPU memory storage and networking. For Hypervisor isolation, the mismatch is licensing and compliance rules require all VMs for the workload to run on a physical server not shared with another organization; Dedicated host meets that condition instead.
2. Anti-affinity placement keeps selected redundant virtual machines on different physical failure domains so one host outage does not remove every replica. For Anti-affinity placement, the mismatch is licensing and compliance rules require all VMs for the workload to run on a physical server not shared with another organization; Dedicated host meets that condition instead.
3. A bare-metal hypervisor controls hardware resources directly and hosts guest virtual machines as the primary virtualization platform. For Type 1 hypervisor, the mismatch is licensing and compliance rules require all VMs for the workload to run on a physical server not shared with another organization; Dedicated host meets that condition instead.
4. A dedicated host reserves the physical server for workloads belonging to one organization when tenancy or licensing requirements prohibit sharing the host. For Dedicated host, the relevant condition is licensing and compliance rules require all VMs for the workload to run on a physical server not shared with another organization.

 

Question 3

A service runs on two redundant VMs. Architects want to prevent a single hypervisor host failure from taking down both replicas. Which placement rule should they apply? Choose ONE.

1. Anti-affinity placement
2. Affinity placement
3. Dedicated host
4. Resource reservation

Correct Answer(s)

 

A

Rationale

1. Anti-affinity placement keeps selected redundant virtual machines on different physical failure domains so one host outage does not remove every replica. For Anti-affinity placement, the relevant condition is two application replicas must not be placed on the same physical host because one host failure must not remove both.
2. Affinity rules co-locate selected virtual machines and can improve locality at the cost of placing them in a shared failure domain. For Affinity placement, the mismatch is two application replicas must not be placed on the same physical host because one host failure must not remove both; Anti-affinity placement meets that condition instead.
3. A dedicated host reserves the physical server for workloads belonging to one organization when tenancy or licensing requirements prohibit sharing the host. For Dedicated host, the mismatch is two application replicas must not be placed on the same physical host because one host failure must not remove both; Anti-affinity placement meets that condition instead.
4. Reservations protect critical workloads from losing their required baseline resources when other VMs compete for shared host capacity. For Resource reservation, the mismatch is two application replicas must not be placed on the same physical host because one host failure must not remove both; Anti-affinity placement meets that condition instead.

 

Question 4

Two tightly coupled VMs exchange extremely high volumes of data and the design deliberately prefers co-location over host-failure separation. Which placement policy expresses that intent? Choose ONE.

1. Anti-affinity placement
2. Live migration
3. Affinity placement
4. Dedicated host

Correct Answer(s)

 

C

Rationale

1. Anti-affinity policies separate related VM replicas across hosts to reduce the chance that one hardware failure defeats workload redundancy. For Anti-affinity placement, the mismatch is two non-redundant VMs should be placed together because locality is more important than separating their hardware failure domains; Affinity placement meets that condition instead.
2. Live migration moves a running virtual machine between compatible hosts with minimal service interruption when required compute network and storage prerequisites are met. For Live migration, the mismatch is two non-redundant VMs should be placed together because locality is more important than separating their hardware failure domains; Affinity placement meets that condition instead.
3. Affinity rules co-locate selected virtual machines and can improve locality at the cost of placing them in a shared failure domain. For Affinity placement, the relevant condition is two non-redundant VMs should be placed together because locality is more important than separating their hardware failure domains.
4. A dedicated host reserves the physical server for workloads belonging to one organization when tenancy or licensing requirements prohibit sharing the host. For Dedicated host, the mismatch is two non-redundant VMs should be placed together because locality is more important than separating their hardware failure domains; Affinity placement meets that condition instead.

 

Question 5

A lab requires a firewall implemented entirely on the existing virtualization hosts rather than as a new physical device. Which form factor best describes the packaged software network function? Choose ONE.

1. Virtual machine
2. Virtual switch
3. Physical NIC uplink
4. Virtual appliance

Correct Answer(s)

 

D

Rationale

1. A virtual machine is an isolated software-defined computer with virtual CPU memory storage and network devices presented by a hypervisor. For Virtual machine, the mismatch is a firewall function must run on the virtualization platform without deploying another dedicated physical firewall appliance; Virtual appliance meets that condition instead.
2. Software switching inside a hypervisor connects VM interfaces to each other and to physical adapters while enforcing configured Layer 2 behavior. For Virtual switch, the mismatch is a firewall function must run on the virtualization platform without deploying another dedicated physical firewall appliance; Virtual appliance meets that condition instead.
3. An uplink binds virtual switching to a server’s physical Ethernet adapter, providing the path from guest networks toward the external LAN. For Physical NIC uplink, the mismatch is a firewall function must run on the virtualization platform without deploying another dedicated physical firewall appliance; Virtual appliance meets that condition instead.
4. Network functions such as firewalls can be delivered as prebuilt virtual machines rather than requiring a dedicated physical appliance. For Virtual appliance, the relevant condition is a firewall function must run on the virtualization platform without deploying another dedicated physical firewall appliance.

 

Question 6

A packet travels from one VM to another VM on the same host and same virtual Layer 2 segment. Which component can forward the frame before it reaches any physical network adapter? Choose ONE.

1. Physical NIC uplink
2. Virtual switch
3. North-south traffic
4. Management network

Correct Answer(s)

 

B

Rationale

1. Hypervisor uplinks map virtual switching to physical Ethernet interfaces so north-south traffic can reach external switches and routed networks. For Physical NIC uplink, the mismatch is two VM interfaces on one host and one virtual segment communicate without needing the physical uplink; Virtual switch meets that condition instead.
2. Inside a hypervisor, software Layer 2 forwarding links guest interfaces and selected uplinks while keeping same-host traffic off the external access switch. For Virtual switch, the relevant condition is two VM interfaces on one host and one virtual segment communicate without needing the physical uplink.
3. Traffic leaving a virtual host toward external networks is north-south flow and depends on connectivity beyond the local virtual switch. For North-south traffic, the mismatch is two VM interfaces on one host and one virtual segment communicate without needing the physical uplink; Virtual switch meets that condition instead.
4. A management network carries hypervisor administration and control traffic and should be separated appropriately from ordinary guest application data. For Management network, the mismatch is two VM interfaces on one host and one virtual segment communicate without needing the physical uplink; Virtual switch meets that condition instead.

 

Question 7

VMs can communicate locally, but none can reach the upstream access switch. The virtual switch has no active connection to a server Ethernet adapter. Which missing element causes the external connectivity failure? Choose ONE.

1. Physical NIC uplink
2. Virtual NIC
3. Virtual disk
4. Hypervisor isolation

Correct Answer(s)

 

A

Rationale

1. An uplink binds virtual switching to a server’s physical Ethernet adapter, providing the path from guest networks toward the external LAN. For Physical NIC uplink, the relevant condition is guest traffic reaches the virtual switch but cannot leave the host because no usable physical adapter is connected to that switch.
2. A vNIC gives a guest its own logical Ethernet adapter while the virtualization platform maps that adapter into software switching. For Virtual NIC, the mismatch is guest traffic reaches the virtual switch but cannot leave the host because no usable physical adapter is connected to that switch; Physical NIC uplink meets that condition instead.
3. A virtual disk presents block storage to a guest as if it were a local disk while the backing data resides in files volumes or virtual storage objects. For Virtual disk, the mismatch is guest traffic reaches the virtual switch but cannot leave the host because no usable physical adapter is connected to that switch; Physical NIC uplink meets that condition instead.
4. The virtualization boundary enforces separation among guests while mediating their access to shared physical CPU memory storage and networking. For Hypervisor isolation, the mismatch is guest traffic reaches the virtual switch but cannot leave the host because no usable physical adapter is connected to that switch; Physical NIC uplink meets that condition instead.

 

Question 8

The hypervisor’s virtual switch and physical uplinks are healthy, but one guest operating system has no network adapter presented to it. Which virtual object must be added or repaired? Choose ONE.

1. Virtual switch
2. Physical NIC uplink
3. Virtual NIC
4. VLAN-backed port group

Correct Answer(s)

 

C

Rationale

1. A hypervisor’s software switching fabric learns and forwards Ethernet frames between attached VM interfaces and any configured external uplink paths. For Virtual switch, the mismatch is troubleshooting shows the VM operating system has no Ethernet device attached even though the virtual switch and physical uplink are healthy; Virtual NIC meets that condition instead.
2. A physical NIC uplink connects a virtual switch to the external physical network and carries VM traffic that must leave the host. For Physical NIC uplink, the mismatch is troubleshooting shows the VM operating system has no Ethernet device attached even though the virtual switch and physical uplink are healthy; Virtual NIC meets that condition instead.
3. The guest operating system sends and receives frames through a vNIC whose backing connectivity is provided by the hypervisor and virtual switch. For Virtual NIC, the relevant condition is troubleshooting shows the VM operating system has no Ethernet device attached even though the virtual switch and physical uplink are healthy.
4. A VLAN-backed port group associates virtual machine interfaces with a configured Layer 2 segment and applies the corresponding VLAN treatment on the virtual switch. For VLAN-backed port group, the mismatch is troubleshooting shows the VM operating system has no Ethernet device attached even though the virtual switch and physical uplink are healthy; Virtual NIC meets that condition instead.

 

Question 9

A VM has a functional vNIC but lands in VLAN 40 instead of required VLAN 30 because its virtual network attachment is mapped to the wrong segment. Which configuration should be corrected? Choose ONE.

1. VLAN-backed port group
2. Virtual NIC
3. Physical NIC uplink
4. Management network

Correct Answer(s)

 

A

Rationale

40. A VLAN-backed port group associates virtual machine interfaces with a configured Layer 2 segment and applies the corresponding VLAN treatment on the virtual switch. For VLAN-backed port group, the relevant condition is a VM should be in VLAN 30 but its virtual interface is attached to the logical group mapped to VLAN 40.
41. The guest operating system sends and receives frames through a vNIC whose backing connectivity is provided by the hypervisor and virtual switch. For Virtual NIC, the mismatch is a VM should be in VLAN 30 but its virtual interface is attached to the logical group mapped to VLAN 40; VLAN-backed port group meets that condition instead.
42. An uplink binds virtual switching to a server’s physical Ethernet adapter, providing the path from guest networks toward the external LAN. For Physical NIC uplink, the mismatch is a VM should be in VLAN 30 but its virtual interface is attached to the logical group mapped to VLAN 40; VLAN-backed port group meets that condition instead.
43. Virtualization management interfaces use a dedicated control path so host administration is not unnecessarily exposed on user workload segments. For Management network, the mismatch is a VM should be in VLAN 30 but its virtual interface is attached to the logical group mapped to VLAN 40; VLAN-backed port group meets that condition instead.

 

Question 10

Operations currently relies on VM snapshots stored with production workloads. Auditors require recovery after the entire production datastore is lost. What should the protection design add? Choose ONE.

1. VM snapshot
2. Virtual disk
3. Live migration
4. Independent backup

Correct Answer(s)

 

D

Rationale

1. Snapshots are useful for temporary rollback around controlled changes while remaining dependent on the virtualization storage and snapshot chain. For VM snapshot, the mismatch is the recovery copy must remain usable after loss of the primary virtualization datastore rather than depend on snapshot files stored there; Independent backup meets that condition instead.
2. A virtual disk presents block storage to a guest as if it were a local disk while the backing data resides in files volumes or virtual storage objects. For Virtual disk, the mismatch is the recovery copy must remain usable after loss of the primary virtualization datastore rather than depend on snapshot files stored there; Independent backup meets that condition instead.
3. VM mobility can relocate an active guest between hosts while preserving workload continuity if the destination has compatible resources and connectivity. For Live migration, the mismatch is the recovery copy must remain usable after loss of the primary virtualization datastore rather than depend on snapshot files stored there; Independent backup meets that condition instead.
4. An independent backup copies protected data or VM state into separate recoverable storage so recovery is not dependent on the live virtual disk chain. For Independent backup, the relevant condition is the recovery copy must remain usable after loss of the primary virtualization datastore rather than depend on snapshot files stored there.

 

Question 11

A test engineer will make a risky change for thirty minutes and wants an easy rollback to the pre-change VM state. The task is not a long-term recovery strategy. What should be used? Choose ONE.

1. Independent backup
2. Live migration
3. VM snapshot
4. Virtual disk

Correct Answer(s)

 

C

Rationale

1. An independent backup copies protected data or VM state into separate recoverable storage so recovery is not dependent on the live virtual disk chain. For Independent backup, the mismatch is an engineer needs rapid rollback of one test VM after a short configuration experiment and independent disaster recovery is not the goal; VM snapshot meets that condition instead.
2. VM mobility can relocate an active guest between hosts while preserving workload continuity if the destination has compatible resources and connectivity. For Live migration, the mismatch is an engineer needs rapid rollback of one test VM after a short configuration experiment and independent disaster recovery is not the goal; VM snapshot meets that condition instead.
3. A VM snapshot records a point-in-time state or disk dependency chain for short-term rollback but is not a substitute for an independent backup. For VM snapshot, the relevant condition is an engineer needs rapid rollback of one test VM after a short configuration experiment and independent disaster recovery is not the goal.
4. Guests interact with virtual disks through standard storage interfaces even though the hypervisor maps those devices onto underlying storage. For Virtual disk, the mismatch is an engineer needs rapid rollback of one test VM after a short configuration experiment and independent disaster recovery is not the goal; VM snapshot meets that condition instead.

 

Question 12

During normal load the VM host performs well, but at month end every guest becomes CPU-intensive and ready queues increase because promised vCPU capacity exceeds physical CPU capacity. Which design choice is being exposed? Choose ONE.

1. Resource reservation
2. Resource overcommitment
3. Resource limit
4. Memory virtualization

Correct Answer(s)

 

B

Rationale

1. Reserved capacity establishes a minimum entitlement for a VM so competing guests cannot take that protected share during host pressure. For Resource reservation, the mismatch is many VMs simultaneously demand their allocated vCPUs and the physical processors cannot provide all requested execution capacity; Resource overcommitment meets that condition instead.
2. Resource overcommitment assigns more virtual capacity than the physical host has available on the assumption that not every VM peaks simultaneously. For Resource overcommitment, the relevant condition is many VMs simultaneously demand their allocated vCPUs and the physical processors cannot provide all requested execution capacity.
3. Limits constrain a VM to an upper resource boundary and can intentionally prevent one guest from consuming excess shared capacity. For Resource limit, the mismatch is many VMs simultaneously demand their allocated vCPUs and the physical processors cannot provide all requested execution capacity; Resource overcommitment meets that condition instead.
4. Memory virtualization maps guest-visible memory to physical host memory and lets the hypervisor manage allocation isolation and contention. For Memory virtualization, the mismatch is many VMs simultaneously demand their allocated vCPUs and the physical processors cannot provide all requested execution capacity; Resource overcommitment meets that condition instead.

 

Question 13

A latency-sensitive network analytics VM competes with batch VMs on the same host. Which control should guarantee its minimum compute entitlement during contention? Choose ONE.

1. Resource limit
2. Resource overcommitment
3. Resource reservation
4. Affinity placement

Correct Answer(s)

 

C

Rationale

1. A resource limit caps the maximum host resource a virtual machine can consume even when additional CPU or memory capacity is available. For Resource limit, the mismatch is a latency-sensitive VM must keep guaranteed processor resources while less important guests contend for the same host; Resource reservation meets that condition instead.
2. Overcommit improves utilization but can create contention when aggregate guest demand exceeds the physical resources available at the same time. For Resource overcommitment, the mismatch is a latency-sensitive VM must keep guaranteed processor resources while less important guests contend for the same host; Resource reservation meets that condition instead.
3. A reservation protects a specified resource floor for an important guest, ensuring contention cannot consume capacity that has been guaranteed to it. For Resource reservation, the relevant condition is a latency-sensitive VM must keep guaranteed processor resources while less important guests contend for the same host.
4. Affinity rules co-locate selected virtual machines and can improve locality at the cost of placing them in a shared failure domain. For Affinity placement, the mismatch is a latency-sensitive VM must keep guaranteed processor resources while less important guests contend for the same host; Resource reservation meets that condition instead.

 

Question 14

A multi-tenant lab needs to stop one VM from using more than its approved CPU allocation under any condition. Which control enforces an upper ceiling? Choose ONE.

1. Resource limit
2. Resource reservation
3. Anti-affinity placement
4. CPU virtualization

Correct Answer(s)

 

A

Rationale

1. Limits constrain a VM to an upper resource boundary and can intentionally prevent one guest from consuming excess shared capacity. For Resource limit, the relevant condition is one VM must be prevented from consuming more than a defined share of CPU even when additional host capacity is free.
2. A reservation protects a specified resource floor for an important guest, ensuring contention cannot consume capacity that has been guaranteed to it. For Resource reservation, the mismatch is one VM must be prevented from consuming more than a defined share of CPU even when additional host capacity is free; Resource limit meets that condition instead.
3. Anti-affinity policies separate related VM replicas across hosts to reduce the chance that one hardware failure defeats workload redundancy. For Anti-affinity placement, the mismatch is one VM must be prevented from consuming more than a defined share of CPU even when additional host capacity is free; Resource limit meets that condition instead.
4. CPU virtualization schedules virtual processors onto physical CPU execution resources and lets multiple guest operating systems share processor capacity. For CPU virtualization, the mismatch is one VM must be prevented from consuming more than a defined share of CPU even when additional host capacity is free; Resource limit meets that condition instead.

 

Question 15

A production virtualization server will have no desktop host operating system. The selected platform should own hardware scheduling and device access directly. Which hypervisor category fits? Choose ONE.

1. Type 2 hypervisor
2. Virtual machine
3. Virtual appliance
4. Type 1 hypervisor

Correct Answer(s)

 

D

Rationale

1. Type 2 hypervisors run as applications on a conventional host operating system and are commonly used for desktop or lab virtualization. For Type 2 hypervisor, the mismatch is the server should dedicate its hardware to the virtualization platform rather than run a workstation OS beneath it; Type 1 hypervisor meets that condition instead.
2. VMs package a guest operating system and applications behind virtualized hardware interfaces while sharing the underlying physical host. For Virtual machine, the mismatch is the server should dedicate its hardware to the virtualization platform rather than run a workstation OS beneath it; Type 1 hypervisor meets that condition instead.
3. A virtual appliance packages a network or security function as a virtual machine so the service can run in software on standard virtualization infrastructure. For Virtual appliance, the mismatch is the server should dedicate its hardware to the virtualization platform rather than run a workstation OS beneath it; Type 1 hypervisor meets that condition instead.
4. A bare-metal hypervisor controls hardware resources directly and hosts guest virtual machines as the primary virtualization platform. For Type 1 hypervisor, the relevant condition is the server should dedicate its hardware to the virtualization platform rather than run a workstation OS beneath it.

 

Question 16

A portable certification lab must run virtual network appliances on top of the engineer’s existing laptop OS without repartitioning the computer as a dedicated hypervisor server. Which model is appropriate? Choose ONE.

1. Type 1 hypervisor
2. Type 2 hypervisor
3. Dedicated host
4. Virtual switch

Correct Answer(s)

 

B

Rationale

1. A bare-metal hypervisor controls hardware resources directly and hosts guest virtual machines as the primary virtualization platform. For Type 1 hypervisor, the mismatch is an engineer wants virtual appliances to run inside software installed on a normal laptop operating system; Type 2 hypervisor meets that condition instead.
2. Type 2 hypervisors run as applications on a conventional host operating system and are commonly used for desktop or lab virtualization. For Type 2 hypervisor, the relevant condition is an engineer wants virtual appliances to run inside software installed on a normal laptop operating system.
3. Dedicated hosting provides physical host isolation rather than merely guest-level separation on a shared virtualization server. For Dedicated host, the mismatch is an engineer wants virtual appliances to run inside software installed on a normal laptop operating system; Type 2 hypervisor meets that condition instead.
4. Inside a hypervisor, software Layer 2 forwarding links guest interfaces and selected uplinks while keeping same-host traffic off the external access switch. For Virtual switch, the mismatch is an engineer wants virtual appliances to run inside software installed on a normal laptop operating system; Type 2 hypervisor meets that condition instead.

 

Question 17

An API VM calls a database VM within the internal virtualized environment. The flow stays inside the data center workload fabric. What traffic direction is this? Choose ONE.

1. North-south traffic
2. Management network
3. Physical NIC uplink
4. East-west traffic

Correct Answer(s)

 

D

Rationale

1. North-south traffic moves between internal workloads and external users networks or services and commonly traverses physical uplinks or edge devices. For North-south traffic, the mismatch is traffic travels from one internal VM tier to another and never enters or exits through an external user-facing boundary; East-west traffic meets that condition instead.
2. Virtualization management interfaces use a dedicated control path so host administration is not unnecessarily exposed on user workload segments. For Management network, the mismatch is traffic travels from one internal VM tier to another and never enters or exits through an external user-facing boundary; East-west traffic meets that condition instead.
3. An uplink binds virtual switching to a server’s physical Ethernet adapter, providing the path from guest networks toward the external LAN. For Physical NIC uplink, the mismatch is traffic travels from one internal VM tier to another and never enters or exits through an external user-facing boundary; East-west traffic meets that condition instead.
4. Traffic between VMs on the same host or within the same virtualized environment is an east-west communication pattern. For East-west traffic, the relevant condition is traffic travels from one internal VM tier to another and never enters or exits through an external user-facing boundary.

 

Question 18

A remote client request enters the enterprise network and is delivered to an application VM. What directional classification best describes that flow? Choose ONE.

1. East-west traffic
2. Virtual switch
3. North-south traffic
4. Virtual NIC

Correct Answer(s)

 

C

Rationale

1. Traffic between VMs on the same host or within the same virtualized environment is an east-west communication pattern. For East-west traffic, the mismatch is traffic crosses from an outside client network through the data-center edge to a virtualized application; North-south traffic meets that condition instead.
2. Inside a hypervisor, software Layer 2 forwarding links guest interfaces and selected uplinks while keeping same-host traffic off the external access switch. For Virtual switch, the mismatch is traffic crosses from an outside client network through the data-center edge to a virtualized application; North-south traffic meets that condition instead.
3. Traffic leaving a virtual host toward external networks is north-south flow and depends on connectivity beyond the local virtual switch. For North-south traffic, the relevant condition is traffic crosses from an outside client network through the data-center edge to a virtualized application.
4. A virtual NIC is the network interface presented to a guest virtual machine and connected to a virtual switch rather than directly to a physical port. For Virtual NIC, the mismatch is traffic crosses from an outside client network through the data-center edge to a virtualized application; North-south traffic meets that condition instead.

 

Question 19

Operations must patch a hypervisor host but wants a critical VM to continue running on another compatible server during the maintenance window. Which capability should be used? Choose ONE.

1. VM snapshot
2. Live migration
3. Anti-affinity placement
4. Independent backup

Correct Answer(s)

 

B

Rationale

1. A VM snapshot records a point-in-time state or disk dependency chain for short-term rollback but is not a substitute for an independent backup. For VM snapshot, the mismatch is a running VM must relocate to another compatible server so the source hypervisor can be serviced with minimal outage; Live migration meets that condition instead.
2. VM mobility can relocate an active guest between hosts while preserving workload continuity if the destination has compatible resources and connectivity. For Live migration, the relevant condition is a running VM must relocate to another compatible server so the source hypervisor can be serviced with minimal outage.
3. Anti-affinity placement keeps selected redundant virtual machines on different physical failure domains so one host outage does not remove every replica. For Anti-affinity placement, the mismatch is a running VM must relocate to another compatible server so the source hypervisor can be serviced with minimal outage; Live migration meets that condition instead.
4. Backup provides a distinct recovery copy and is the appropriate protection when the failure domain must extend beyond the current VM snapshot structure. For Independent backup, the mismatch is a running VM must relocate to another compatible server so the source hypervisor can be serviced with minimal outage; Live migration meets that condition instead.

 

Question 20

Two virtual routers provide redundancy. If both land on one physical server, a single host outage defeats the design. Which placement rule should prevent that outcome? Choose ONE.

1. Anti-affinity placement
2. Affinity placement
3. Dedicated host
4. Resource reservation

Correct Answer(s)

 

A

Rationale

1. Anti-affinity policies separate related VM replicas across hosts to reduce the chance that one hardware failure defeats workload redundancy. For Anti-affinity placement, the relevant condition is an application design uses two VM replicas and requires the scheduler to avoid a common physical host failure.
2. Affinity placement intentionally places related workloads together when locality is more important than surviving a common host failure. For Affinity placement, the mismatch is an application design uses two VM replicas and requires the scheduler to avoid a common physical host failure; Anti-affinity placement meets that condition instead.
3. Dedicated hosting provides physical host isolation rather than merely guest-level separation on a shared virtualization server. For Dedicated host, the mismatch is an application design uses two VM replicas and requires the scheduler to avoid a common physical host failure; Anti-affinity placement meets that condition instead.
4. A reservation protects a specified resource floor for an important guest, ensuring contention cannot consume capacity that has been guaranteed to it. For Resource reservation, the mismatch is an application design uses two VM replicas and requires the scheduler to avoid a common physical host failure; Anti-affinity placement meets that condition instead.

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