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Or can I just write the name in &nbsp;host file?
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Or can I just write the name in  host file?

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I just need for some testing. so I need esx and vcenter server need to be in DNS? or &nbsp;Can I just put it in host file for temporarily ?
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I just need for some testing. so I need esx and vcenter server need to be in DNS? or  Can I just put it in host file for temporarily ?

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put in host file for testing.
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When we install vcenter, do we need to register the hostname in DNS? or can I just use the IP address?
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When we install vcenter, do we need to register the hostname in DNS? or can I just use the IP address?

vcenter installation

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.

Storage

VMware, a software company founded in 1998,  was one of the first commercially successful companies to offer x86 virtualization. The storage company EMC purchased VMware in 1994. Dell Technologies acquired EMC in 2016. VMware’s parent company is now Dell Technologies.

VMware has many software products that run on desktops, Microsoft Windows, Linux, and macOS, which allows the virtualizing of the x86 architecture.  Its enterprise software hypervisor for servers, VMware vSphere Hypervisor (ESXi), is a bare-metal hypervisor that runs directly on the server hardware and does not require an additional underlying operating system.