CWS-415 Citrix Virtual Apps and Desktops 7 Assessment, Design and Advanced Configuration Quiz Questions and Answers

An additional zone was recently added to a Citrix Virtual Apps and Desktops environment. The main zone is located in New York City, and a small, second zone is located in Tokyo. Within the next year, the number of users in Tokyo is expected to equal that in New York City. A Citrix Architect recommended the addition of 2 StoreFront servers in Tokyo to support the users. What should the architect recommend for this environment to ensure user-experience consistency and reduce WAN bandwidth consumption?

Answer :
  • Add 2 StoreFront servers to separate server groups and configure subscription synchronization

Explanation :

It is recommended to configure separate server groups across datacenters spanning multiple geo-locations. Also, configure subscription synchronization between server groups of New York and Japan Storefront servers to allow for favorite synchronization. As favorites are updated frequently by users, this can be scheduled during off peak hours to reduce the bandwidth consumption. Optimal Gateway feature requires the ADC Gateway to be configured which is not specified here. Also, standalone server will not help this scenario.

A Citrix Architect is designing a new Citrix Virtual Apps and Desktops environment. Management has advised that they have a limited budget for the new solution. However, they still expect the design to account for future growth without the need to redesign or repurchase central hardware components. Additionally, the current 1 Gb network infrastructure CANNOT be replaced within the scope of this project. The architect has determined that the company can support both current and future load with 2 to 3 separate Virtual Delivery Agent (VDA) machine images. Which two features should the architect consider while designing the Citrix Hypervisors for the proposed Citrix environment? (Choose two.)

Answer :
  • Thin provisioning
  • Intellicache

Explanation :

Thin Provisioning allows for utilizing existing storage space for workloads which occupies only the space required at present and grows as per the need instead of entirely committing the stoarge space up front. IntelliCache features allows to cache the PVS steem data on hypervisor's host memory and hence reduces the network utilization for cached data needs.

A Citrix Architect needs to assess a Citrix Virtual Apps and Desktops environment. There are three CVAD zones (part of single CVAD Site) created in three separate locations all connected through low latency links. a) Primary Zone (With one Delivery Controller, VDAs and database) b) Satellite Zone 1 (With only VDAs) c) Satellite Zone 2 (With one Delivery Controller and VDAs) Which statement is correct if the Delivery Controller in Satellite Zone 2 fails?

Answer :
  • Virtual Delivery Agent (VDA) machines in Zone 2 will register within the Primary Zone

Explanation :

VDAs in Satellite zone will register only with the Delivery Controllers in that zone Or will register with the Delivery Controllers of Primary Zone, if the respective Stellite Zone Delivery Controlers are unavailable for registration. The question here specifies a failed Delivery Controller which means even LHC will not be functional during that scenario.

A Citrix Architect is designing a new Citrix Virtual Apps and Desktops environment. The Site will contain two Delivery Controllers. All machines are running on a single hypervisor platform. As part of the deployment, management has advised they want a database high-availability (HA) solution to protect the environment against the loss of a physical server. Additional considerations for the SQL HA: Downtime for Citrix administrative functions should be minimized. Additional hardware or resources should be minimized. Limited knowledge available to configure and maintain SQL infrastructure. Which HA configuration should the architect use for this deployment?

Answer :
  • VM-Level HA

Explanation :

Local Host Cache mode does not allow administrative functions during the outage of the database. SQL Always On and SQL mirroring though a supported configuration for CVAD deployment, it will require extensive SQL expertise for the configuration. VM-Level HA allows for all the stated requirements as it is configured at the hypervisor cluster level.

Which mode on the Citrix ADC can a Citrix Administrator utilize to avoid asymmetrical packet flows and multiple route/ARP lookups?

Answer :
  • MAC-based forwarding (MBF)

Explanation :

MAC-based forwarding improves performance of ADC by avoiding multiple ARP or route table lookup when forwarding the packet, When MBF is enabled it cache the MAC address of uplink router which forwarded the requestto ADCand when reply is received it is passed t osame router who sent client requestwithout going through any route lookup.

An automobile manufacturer in Germany has deployed a Citrix Virtual Apps and Desktops solution for its employees using Citrix Cloud and uses a resource location in Germany. Recently, they acquired an automobile manufacturer in Japan. Since then, users from Japan have reported issues regarding slowness and degraded performance of the application hosted in the German resource location. How can a Citrix Architect improve the performance of the application for users in Japan?

Answer :
  • Provision new resources in Japan’s resource location

Explanation :

The slowness and degraded performance is due to the latency between the Japan user loaction and the resource location which is in Germany. To overcome this, the resurces should be deployed to a location near to Japan users. Other options provided do not help in resolving the slowness issue in this scenario.

A Citrix Architect deployed a new Citrix Virtual Desktops environment in Citrix Cloud. The environment is accessed exclusively by users in a location where Citrix Cloud does NOT have a local point of presence (POP). The Corporate Security team advises that a new industry regulation requires that all user HDX-session communications remain within the country. What should the architect configure for this deployment?

Answer :
  • On-premises Citrix Gateway with Citrix Cloud-hosted Workspace

Explanation :

To meet the stated security requirement, use an On-Premise Citrix Gateway paired with Citrix Cloud hosted Workspace. The initial authentication and enumeration will pass through the Workspace and Cloud Connector combination but all HDX Session will pass through Gateway on Premise setup in the same country.

A Citrix Architect is designing a Citrix Virtual Apps and Desktops environment. The company has a small IT team with limited experience deploying and maintaining this type of environment. To perform adequately, the line of business application used by the company must be hosted < 10ms RTT from a backend database located within a customer managed data center. Which Citrix Virtual Apps and Desktops environment best meets the needs of this organization?

Answer :
  • Citrix Virtual Apps and Desktops Service and on-premises workload

Explanation :

Citrix Cloud service is managed by Citrix thus reducing the administratve overahead and complexity for the inexperienced IT team. On Premise resource location means VDAs hosting applications reside in the same datacenter as that of databases meeting the stated latency requirement.

A Citrix Architect needs to manage the disaster recovery (DR) process for a Citrix Virtual Apps and Desktops environment. The environment currently consists of an active data center typically accessed by users, and a DR data center used in the event that a disaster impacts the primary data center. Management has made it a priority to minimize the loss of data when failing over between data centers. The environment has failed over from the primary data center to the DR data center and the primary data center has subsequently been recovered to its normal state. What is the appropriate sequence of steps that the architect should follow to return to normal operations after the primary data centre’s stability is confirmed?

Answer :
  • Block access to the DR data center, terminate/drain existing sessions in the DR data center, complete replication to the primary data center, configure replication back to the DR data center, and enable access in the primary data center.

Explanation :

The right approach for disaster recovery is : Block access to functional datacenter which has failed and has existig connections, Terminate existing Connections, Enable replication to recovered Primary/DR datacenter and enable access to the recovered Primary/DR datacenter.