VTSP 5.5 Module 4 VMWare vSphere: vNetworks Test Dump Helpful Links: http://wenku.baidu.com/view/0f40876cc850ad02df804102.html
Q: Following some reconfiguration reconfiguration work on the virtual network configuration of your customer’s vSphere 5.5 hosts, network traffic has suddenly stopped for one segment of the network. Monitoring the physical switch shows that all packets of data from that segment segment are either being dropped or the router is responding with messages indicating TTL’s have been exceeded. Which of the following items are most likely to be the cause of this issue? Choose two.
A: The port group name is incorrect The VLAN ID is wrong for that segment The MTU is incorrect The Uplink (vmnic) has failed The Cable between the physical switch and physical uplink (vmnic) has failed and beacon packets are causing a broadcast storm
Q: Your customer is concerned that their dvSwitch configuration configuration is very complex and they are concerned that in a disaster recovery situation they have to manually reconstruct their dvSwitch configurations. Which Which of the following procedures should you advise your customer to follow to ensure they can recover from a corrupted dvSwitch configuration? Choose one.
A: They should use a Third Party backup solution to back up their ESXi host network configuration They can back up the configuration of each Distributed Virtual Switch from within the Distributed Virtual Switch itself They must ensure that all configuration settings are fully documented They can use the VMware Data Protection Appliance to back up their ESXi host configurations, including the distributed vSwitches They can access the ESXi console and backup the network settings from there Q: Which vSphere 5.5 featured reduces the amount of time needed to apply Link Aggregation Control Protocol (LACP) configuration to all hosts? Choose one. A: Templates
Blue Prints Clones Snapshots High Availability Q: You need to ensure that all voice over IP (VoIP) traffic in your network is given the highest priority. You have decided to use traffic filtering to apply a Quality of Service (QoS) tag to this type of traffic. Where do you configure traffic filtering?? Choose one: A: At the vSphere Distributed Switch load balancing level At the vSphere Distributed Switch Port Group level At the vSphere Standard vSwitch Port Group level At the vSphere Standard vSwitch Uplink level
Q: Your customer wants to upgrade from vCloud Networking and Security version 5.1 to version 5.5. Which two of the following are not provided in vCloud Networking and Security 5.5? Choose two. A: vCNS for vCD 1 vCNS Standard vShield Endpoint vCNS Advanced Q: You have implemented Distributed vSwitches (DVS) for all virtual networking in a customer’s virtual environment. What will happen if vCenter becomes unavailable? Choose one. A: All network configurations would immediately be lost and all network activity would stop – vCenter should be p rotected with VMware Fault Tolerance if you are using distributed vSwitches Network activity will stop for a few minutes but HA will restart vCenter and everything will return to normal Virtual Machine and VMKernel network traffic works normally but you cannot manage or reconfigure the dvSwitch(es) until vCenter is recovered – today 2 vSphere automatically migrates all virtual machines over to Standard vSwitches and everything continues to work as normal with no downtime. Q: You have developed a virtual network design that makes use of standard virtual switches with four uplinks teamed using Route based on IP hash. During testing you find that some virtual machine traffic is failing to reach its destination but this is not c onsistent. Which of the following items should you check to ensure that the environment is configured correctly for this t ype of load balancing? Choose two. A: Ensure that the physical ports on the switches are configured to use LACP 1 - today Ensure that the physical ports on the switches are configured to use static Etherchannel 2 - today Ensure that the physical uplinks are not connected to separate physical switches that are not stacked
Ensure that the physical uplinks are all connected to a single physical switch 1, 2 Q: Your customer has a datacenter where each ESXi host can have only a limited number of physical uplinks. Under normal operation, each virtual network will have two uplinks, but t here is not enough capacity to dedicate standby NICs to handle failures. You want to ensure that each virtual network will always use its own dedicated uplinks but that during NIC, link or physical switch failures the uplinks from other virtual networks can be used. Which specific Failover Policies allow you to manage which uplinks are used during and after failures? Choose two. A: Network Failure Detection - today Notify Switches Failover Order – today 2 Failback – today 2 Q: A customer would like to centralize the management of all network configurations for all hosts. Which VMware license type will they require, and w hich type of network switches will they be configuring? Choose one. A: VMware Enterprise Edition, and Distributed vSwitches VMware Enterprise Plus Edition, and Standard vSwitches VMware Enterprise Plus Edition, and Distributed vSwitches VMware Enterprise Edition, and Standard vSwitches
Q: You are working on a virtual network and realize that network uplink bandwidth utilization is very high and key systems are being impacted. You wish to ensure that no single process can use all of t he available bandwidth. Which networking feature of Network I/O Control (NIOC) w ould you configure to ensure this? Choose one. A: Isolation Limits Reservations Shares Q: You suspect that poor network performance in a vSphere environment that you support is being caused by an incorrect switch configuration. You have implemented a centralized network configuration using Distributed vSwitches (version 5.5) throughout. What feature of these dvSwitches could you use to asce rtain the cause of the problem? Choose one. A: Network Teaming Analysis Network Monitoring dvSwitches do not have any features that allow this. Network Health Check Q:
You are tasked with configuring the network connections (virtual switches, physical uplinks and port groups) for multiple ESXi hosts. You could manually configure each host which would be time-consuming and could potentially introduce errors. You elect to configure one host correctly and then extract these settings and apply them to the new hosts. Which vSphere 5.5 feature should you use to do this? Choose one.
Page 30. http://pubs.vmware.com/vsphere-55/topic/com.vmware.ICbase/PDF/vsphere-esxi-vcenter-server-55networking-guide.pdf A: vSphere Host Profiles vSphere Management Assistant vSphere Host Templates VMware Tools Q: You have just carried out a migration of a physical server to a virtual machine. The server hosts an application which used the MAC address of the original physical server network adapter as part of t he application licensing parameters. The application will not start after the migration reporting an error with its license key. What should you advise your customer to do to resolve this?: Choose one. A: Obtain a new license key from the Application supplier (or agent) using the MAC address of the virtual NIC in the new application server VM Obtain a new license key from the Application supplier (or agent) using the MAC address of any physical NIC u sed for VM traffic in the ESXi host Remove the original network adapter from the old physical server and install it in your ESXi Host as an uplink NIC for vSwitch used by the VM Upgrade to Enterprise Licenses for the ESXi hosts in order to enable MAC address spoofing on the vSwitch used by the application VM Q: You are designing a vSphere environment that will have to support NAS Storage. The storage team has already physically connected the storage units to the network. What specific network feature must you specify for each host to ensure that the storage will be available for use? Choose one. A: Configure the virtual switch and vmkernel port to support Jumbo Frames 2 Configure the MTU on the virtual switch to be 9000 bytes Install the vendor’s NAS/NFS vSphere plugin Add a vmkernel port with an IP address that can access the NAS storage 1 Q: Your customer has two datacenters in their campus on separate layer 3 networks. They have excess capacity in the vSphere environment in one of the datacenters and are approaching the capacity limits in the other. They want to investigate the use of VXLANs to allow them to configure their environment so that they can move virtual machines between the two datacenters without reconfiguring them. Which of the following are pre-requisites that they must ensure are met in order to be able to implement VXLANs? Choose three. A: A multicast range and segment ID pool must be assigned – today 2 vShield Endpoint must be installed in both datacenters DHCP must be available on all VXLAN transport VLANs – today1, 2 vCenter server must be at v5.1 or later – today1, 2
All hosts must be at ESXi v5.0 or later – today1 Q: You have been monitoring network traffic statistics from a number of virtual machines in a customer’s environment. You find that for some VMs, the network statistics are reset if the VM is vMotion-migrated to a different host, but this does not happen to all VMs. Why are these statistics reset for some VMs and not for others? Choose two. A: Since all information pertaining to distributed ports is stored by vCenter in the vCenter database, the distributed virtual port statistics for VMs connected to a distributed vSwitch are retained when a VM is migrated – today 2 Since all information pertaining to standard ports is stored by vCenter in the vCenter DB, the virtual port statistics for VMs connected to a standard vSwitch are retained when a VM is migrated - today Since all information pertaining to standard ports is stored by the ESXi host, the virtual port statistics for VMs connected to a standard vSwitch are reset when a VM is migrated – today 2 Since all information pertaining to distributed ports is stored by the ESXi host, the virtual port statistics for VMs connected to a distributed vSwitch are reset when a VM is migrated - today Q: You are designing a virtual network environment that will make use of PVLANS to create to create a DMZ. Your PVLAN design has a Primary PVLAN 100 that is promiscuous, a secondary promiscuous PVLAN 101, secondary isolated PVLANs 105 & 106 and secondary community PVLANs 125 &126. You have an application that must be deployed in the DMZ that requires two servers that must be able to communicate with each other but must be isolated from all other systems in the DMZ. Which PVLANs can be used for these VMs? Choose two. A: 101 105 106 125 126 Q: You are working on a design where the customer has specified that network uplink failures that are caused by physical switch configuration errors must be detected by vSphere and trigger a virtual switch uplink failover. Which network policy must you configure to support this? Choose one. A: Beacon Probing Link Status Notify Switches Failover Order Q: You want to create 10 Link Aggregation Groups (LAGs) on a vSphere Distributed Switch. However, you find that you are not able to successfully complete the configuration. Which one of the following is the most likely cause? Choose one. A: You have already deployed 32 LAGs which exceeds the maximum allowed in vSphere 5.5 You are trying to create the LAGs on a vSphere 5.1 host You are trying to create the LAGS on a vSphere 5.5 host
You have configured the LAGs using Single Sign-On which is not permitted Q: You have been tasked with updating the virtual networking design for a growing virtual infrastructure. You are restricted to a fixed set of IP addresses and, while you are successfully using subnets and VLANs to segregate traffic today, these will not be sufficient to handle the expected growth. Which two VMware technologies should you consider in order to help deal with the expected growth? Choose two. A: PVLAN NIOC VXLAN LACP Q: A customer is experiencing poor network performance and you have identified that network uplink bandwidth is insufficient for the demand on their ESXi hosts. There are unused physical network adapters in each of your hosts and the physical switches support NIC teaming. You tell the customer that t he unused adapters on each host should be configured as additional uplinks for the production standard vSwitch. Which of the following teaming policies are valid choices for the uplink NIC teaming policy for the vSwitch uplinks? Choose three. A: Route based on Originating Port ID Load-based teaming Route based on IP Hash Route based on Source MAC Hash Route based on PVLAN ID Q: Your networking team has designed a script to automate the deployment of virtual switches for Datacenter hosts. The interactive script requires input indicating which uplinks to use, the port group type, the port group name, and the number of ports required. You need to deploy a small virtual switch so you run the “Create New vSwitch Script”. You supply all the requested information and you enter the number 48 as the number of virtual ports required. When you open the GUI interface to check the successful deployment of this switch you discover that the switch only appears to have 40 available ports. Why is this? Choose one. A: The maximum number of ports that can be configured via script is 40. The vSphere client interface always displays the default number of ports when a vSwitch is initialized. It is not possible to create a vSwitch with a non -standard number of ports; this number must be changed after the switch has been created. Eight ports are always reserved for management purposes by the ESXi Hypervisor Q: The ESXi hosts that you will be using in a new vSphere cluster will be configured with 2 x 10Gb Ethernet NICs. Which vSphere technologies must you select in order to ensure that you can allocate and control network bandwidth for the Management, IP Storage, vMotion, vSphere Replication and Virtual Machine networks that you need to implement? Choose two. A: Distributed Virtual Switches Network I/O Control
Link Aggregation Control Flow control
Your customer has a test vSphere environment with vCenter Foundation and three ESXi hosts running vSphere 5.1 Enterprise Edition. They have standardized on Cisco network equipment in their environment and have been trying to install a Cisco Nexus 1000V virtual Switch. They have tried to import the virtual switch appliance but this has failed. Why are they unable to install this appliance? Choose one. Their ESXi Enterprise Edition license does not support Distributed Virtual Switches They need to acquire a Cisco virtual appliance license before importing the appliance They need to configure vCenter the Cisco vSwitch plugin before trying toimport the appliance
