Data Center Foundation

 

What is the role of the control plane in the Cisco Nexus switch?

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• Controls switch management.
• Controls access to the console.
• Controls access to the remote console.
• Runs network protocols like OSPF and Spanning Tree.

The network administrator wants to create a Layer 3 isolated segment for the marketing department on a Cisco Nexus 9000 Series switch. It will be under the complete administration of the marketing system administrator. Which option accomplishes this goal?

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• Create a VRF instance.
• Create a VLAN.
• Create a subnet for the marketing department in the management VRF instance.
• Create a subnet for the marketing department in the default VRF instance.

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What are three software components of vSphere environment? (Choose three.)

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• ESXi hypervisor
• VMware Workstation
• vCenter Server
• Hyper-V Server
• Active Directory Server
• vSphere Web Client

 

Which two characteristics apply to virtual machine virtual disk images? (Choose two.)

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• They are just regular files that can be copied and moved like any other file.
• The changes that are made in a virtual machine are not saved between hypervisor restarts.
• The images can be replicated on another host system, but only if it is running on the same physical hardware.
• Virtual disk images are contained in two files that have a .vmdk extension in the datastore.
• The virtual images have .vmdk and .vmdd extensions: one is for data, and the other is for virtual machine configuration.

 

Which feature does the VMware hypervisor use to connect virtual machines in the same hypervisor?

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• VRF
• virtual router
• virtual center
• virtual switch
• virtual LAN

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Which technique does VXLAN encapsulation use?

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• Mac-in-TCP
• Mac-in-UDP
• Mac-in-Mac
• IPsec
• Mac-in-GRE

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In VXLAN unicast Layer 3 packet forwarding, when a virtual machine sends traffic to a local VTEP, what is the destination MAC of the encapsulated packet?

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• the MAC address of the distributed IP anycast gateway
• the burned MAC address of the Ethernet port of the local VTEP
• the MAC address of the ESXi NIC adapter
• MAC address FFFF.FFFF.FFFF

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In which two of the following cases will an OSPFv2 graceful restart will work? (Choose two.)

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• Cisco Nexus switch reload
• supervisor switchover
• OSFPv2 process failure
• misconfigured OSPF neighbor
• misconfigured OSPF on the switch

What is the function of the datastore?

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• It is the physical storage that contains the ESXi operating system.
• It is dedicated storage where only virtual machines are contained.
• It is a logical container that is used by ESXi hypervisors and contains virtual machines and other files that you upload.
• It is local storage that exists on the ESXi machine, but does not contain the ESXi system.
• It is a storage system that virtual machines can access to share files between themselves.

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 In which situation would you be forced to assign several vNICs to a single virtual machine?

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• when trying to achieve better stability if the hypervisor fails
• when more than one virtual machine exists in the virtual environment
• when connecting a single virtual machine to two vSwitches
• when trying to decrease network latency under high-load scenarios
• when connecting the virtual machine to the internet

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Which statement about VXLAN forwarding is true?

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• When the destination MAC address in the original packet header does not belong to the local VTEP, the originating VTEP performs a Layer 2 lookup and bridges the packet to the destination VTEP.
• If the destination MAC address in the original packet header matches the anycast gateway MAC address, VXLAN bridging must occur.
• When building BGP updates for EVPN routes, MP-BGP uses the unicast VTEP address as the next hop.
• When a VTEP switch originates MP-BGP EVPN routes for its locally learned end hosts, it uses the anycast VTEP address as the BGP next hop.

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Which two options are features of a VMware standard switch? (Choose two.)

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• Cisco Discovery Protocol support
• network traffic flow visibility
• access list support
• port channel and virtual guest tagging support
• QoS
• up to 48 network ports for assignment
• STP participation

 

What is the purpose of CoPP?

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• It prevents packets that are destined for the control plane from entering the data plane.
• It prevents overloading of the control module CPU by disconnecting denial of service attackers.
• It monitors traffic that is destined for the control plane and limits the traffic flow, which prevents control module CPU overload.
• It monitors the control module usage and alerts the administrator when it is close to overloading.

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What are two characteristics of the management VRF instance? (Choose two.)

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• The management VRF instance is not present by default and must be enabled.
• The management interface, which is called the mgmt0, is always assigned to the management VRF instance.
• The management VRF instance is the default routing context for show commands.
• EIGRP is supported on the management VRF instance.
• You can create static routing rules on the management VRF instance.
• OSPF is supported on the management VRF instance.

 

How do you specify a VRF instance for a service?

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• You must create routing rules in the default VRF instance that point to other VRF instances to properly route the command.
• Service commands are VRF-aware and detect the correct VRF instance automatically.
• You must always state the VRF instance at the end of a VRF-aware command or it will fail.
• Because the default VRF instance has access to all other VRF instances, the command always executes in the default VRF instance, which correctly routes the command.
• You must state the VRF instance at the end of a VRF-aware command, otherwise it executes in the default VRF instance.

 

What are three benefits of virtualization? (Choose three.)

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• It uses fewer total resources at the same load across several servers.
• It is easier and less disruptive to upgrade physical hardware on the machine.
• It provides better resource management and fewer unused resources.
• There are fewer guest operating system problems with unsupported hardware.
• No licensing is required.
• It is easier to transport virtual machine physical hardware.
• Self-contained virtual disk images can be reproduced in another location.
• The operating system within a virtual machine is completely independent from physical hardware resources.

What would happen if you moved a virtual machine between ESXi hosts in the same group and DPM was not enabled while all other features were enabled?

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• The virtual machine would be unavailable until it restarts on the destination ESXi host.
• The virtual machine would be moved without any interruption in operations of the virtual machine, and the ESXi host would shut down to conserve power.
• The virtual machine on the source host would be isolated, and fault tolerance switchover would be performed.
• The virtual machine would be moved without interruption in the operations of its services.

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What does an overlay network do?

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• It uses the physical network and rearranges its address spaces and routing tables to accommodate a virtual environment.
• It uses virtual configurations, such as virtual MAC addresses and virtual IP addresses of physical hardware, to configure overlay interfaces that an overlay network needs.
• It uses physical infrastructure to transport traffic between virtual nodes within the infrastructure.
• Virtual networks exist only within a VMware vSphere ESXi installation and can span several ESXi physical servers.

What happens when you encapsulate traffic in Layer 3 encapsulation?

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• It transports packets without changing them over a network.
• It transports packets over a network and changes their source MAC address.
• It takes packets, adds a header to them, and sends them over an IP network.
• It creates a Layer 2 tunnel between local and remote nodes and forwards traffic through the tunnel.
• It creates a virtual overlay within a data center that allows Layer 2 devices to communicate with Layer 3 devices.
• Which statement about the distributed anycast gateway in MP-BGP EVPN is true?
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• All VTEPs will have the same virtual gateway IP address but a different virtual gateway MAC address.
• The distributed anycast gateway prevents transparent host mobility in the VXLAN overlay network.
• With the distributed anycast gateway feature, when an end host moves from one VTEP to another VTEP, the end host must send another ARP request to relearn the new gateway MAC address.
• All VTEPs will have the same virtual gateway IP address and virtual gateway MAC address.
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Which two options are characteristics of a VDS switch? (Choose two.)

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• The VDS switch must be created and managed from the vCenter management server.
• The VDS switch can have virtual machine vNICs assigned to allow virtual machine networking.
• The VDS switch cannot span across several ESXi hypervisors.
• The VDS switch requires vMotion for operation.
• The VDS switch unlike a vSwitch does participate in the STP.
• No uplink ports can be assigned to a VDS.

vSphere DRS is used to load-balance virtual machines across the available hosts to provide optimum performance. Which function is needed for vSphere operation?

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• vSphere Fault Tolerance
• vSphere High Availability
• vSphere vMotion
• vSphere DPM

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