Scenario: During an assessment of a Citrix Infrastructure, a Citrix Architect finds that there are four active Sites. Each Site has one NetScaler SDX pair and two StoreFront servers in a server group to allow access for internal and external users. Users have to use different URLs when they access resources from different Sites. Single-factor authentication is used for both internal and external access. NetScaler appliances are placed in the DMZ with the appropriate firewall ports configured to allow Citrix traffic. Many of the internal users connect using corporate-owned laptops and some external users also connect using personal devices.
The architect needs to provide a design for a multi-tier environment with segregated internal and external traffic on the NetScaler appliance.
How many NetScaler instances and StoreFront servers are required to meet this highly available design?
A. Eight NetScaler instances (two in each Site) and sixteen StoreFront servers (four in each Site)
B. Four NetScaler instances (one in each Site) and eight StoreFront servers (two in each Site)
C. Eight NetScaler instances (two in each Site) and eight StoreFront servers (two in each Site)
D. Sixteen NetScaler instances (four in each Site) and eight StoreFront servers (two in each Site)
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D is corretct.
The key is: segregated internal and external traffic on the NetScaler appliance
This means Double Hop for Netscaler, so 4 netscaler and 2 storefront per site
But it expensive and is not a citrix leading practices.
so I´ll answer C
I think answer C is correct. They need an high available design. In this case you need two NS and two SF Server in each site.