What is the difference between ESXi and vCenter server?

Related questions

1. What is the difference between Hyperv and VMware?
2. What is the difference between ESXi and hypervisor?
3. What is an ESXi cluster?
4. What are ESXi hosts?
5. What is VMware hypervisor called?
6. Is VMware vSphere hypervisor 6.5 free?
7. What is ESXi used for?
8. How does ESXi Server work?
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Tags

1. #further
2. #vcenter
3. #centralized
4. #products
5. #company
6. #another
7. #product
8. #includes
9. #hypervisor
10. #helps
11. #virtualization
12. #which
13. #vsphere
14. #shipped
15. #servers
16. #packaged
17. #manage
18. #vmware
19. #server
20. #location
21. #bundle
22. #suite