An administrator configures a Cisco GSS and migrates DNS services to the GSS.
Which of the following is most likely being implemented?
- a GSLB service
- an APIC solution
- a hypervisor running DNS services
- a FabricPath architecture
Most likely, a Cisco global server load balancing (GSLB) service is being implemented if an administrator configures a Cisco Global Site Selector (GSS) and migrates Domain Name System (DNS) services to the GSS. A Cisco GSLB solution is designed to optimize DNS infrastructure, thereby ensuring business continuity in the event of disaster. When DNS services are migrated to GSS, disaster recovery is enhanced by the global load balancing of server load balancers (SLBs) across data centers in disparate geographic locations.
It is not likely that the administrator is implementing a Cisco FabricPath architecture. In addition, it is not likely that the administrator is implementing a Cisco Application Policy Infrastructure Controller (APIC) solution. The Cisco APIC is a means of managing the Cisco Application Centric Infrastructure (ACI). A Cisco ACI architecture requires both the APIC and the spine switches and leaf switches of FabricPath to complete the architecture. The APIC communicates with the spine and leaf nodes and provides policy distribution as well as centralized management.
Spine switches are the Cisco FabricPath component that form the backbone of Cisco FabricPath’s switching fabric. Typically, leaf switches are connected to every spine switch along the backbone so that the spine switches provide connectivity between the leaf switches. A leaf switch is the Cisco FabricPath component that provides access layer connectivity. End hosts and classic Ethernet (CE) networks are typically directly connected to leaf switches by using edge ports. Leaf switches connect to spine switches by using core ports.
It is not likely that the administrator is implementing a hypervisor running DNS services. A hypervisor is hardware virtualization software that runs either on a bare-metal server or as an application on an operating system (OS); hypervisors are used to create and run one or more virtual machines (VMs). Bare-metal server hypervisors are known as Type 1 hypervisors. Application hypervisors are known as Type 2 hypervisors. Neither type of hypervisor will run DNS services by itself. Instead, a VM would need to be created and configured with a guest OS. The DNS service would then need to be configured within the guest OS.