Server Virtualization Quiz

How much do you really know?

Server virtualization through the use of software products such as VMware has been implemented to varying degrees in corporate IT, with some successful and some not-so-successful outcomes. This year, the virtualization trend promises to continue apace.

How much do you know about the benefits, limitations and drawbacks of server virtualization? Take this quiz to see how your understanding compares with that of the experts -- and gain some food for thought as you contemplate whether and where to use virtualization.

1. On a particular server, within each virtual machine:

[a] You can run any version of Windows without regard for the version(s) running in the other virtual machines.

[b] The versions of Windows must be no more than one release apart.

[c] The versions of Windows must be exactly the same.

2. On a particular server:

[a] You can reboot a virtual machine without it having any effect on the other virtual machines.

[b] If you reboot one virtual machine, all the other virtual machines reboot at the same time.

[c] If you need to reboot one virtual machine, you have to first reboot the physical server. The individual virtual machines then reboot automatically when the physical machine reboot is finished.

3. When choosing which applications or databases to place on one physical machine -- using a virtual machine for each application -- it is best to:

[a] Choose a mixture of applications and databases with different workloads (some light, some heavy).

[b] Keep all the heavy-workload applications and databases together and all the light-workload applications and databases together.

4. Server virtualization and the use of blade servers are:

[a] Technically incompatible.

[b] Technologies that should be combined with caution to avoid putting too many eggs in one basket.

[c] Technologies that should be used together whenever possible.

5. The introduction of server virtualization in a data center:

[a] Will make the introduction of a storage-area network (SAN) absolutely necessary.

[b] Will make the introduction of a SAN desirable.

[c] Will not materially change storage requirements.

6. When it comes to avoiding major outages, the use of server virtualization:

[a] Reduces the frequency of hardware-related service outages.

[b] Has no material impact.

[c] Requires that levels of redundancy be increased to avoid an increase in outages affecting multiple applications or services.

7. When deciding on the placement of development, testing/QA and production instances of applications and databases:

[a] You can (and generally should) use virtualization to put the three instances of an application or a database on the same physical server so that the development and test environments are an accurate reflection of the eventual production environment.

[b] You should dedicate physical machines to hosting each type of instance so that the three types are not on the same server, to make it easier to secure the production environment.

[c] It really doesn't matter where you place the different types of instances.

8. In a virtualized server environment, compared with a traditional server environment:

[a] It is easier to keep track of software licensing.

[b] Tracking software licensing is neither materially easier nor harder.

[c] It is significantly harder to keep track of software licensing.

9. The introduction of server virtualization in a data center:

[a] Will make security management easier.

[b] Will have no material impact on the complexity of security management.

[c] Will make security management more difficult.

10. When server virtualization is introduced in a data center, the configuration management database (CMDB) used to support data center operations:

[a] Will not need to be modified or replaced.

[b] Can be retained, although revisions will need to be made to the naming schemes used for servers.

[c] Will need to have its underlying database design (i.e., schema) radically redesigned. If this is not possible with your current CMDB application, new CMDB software may have to be purchased.

11. In a virtualized server environment, compared with a traditional server environment:

[a] The costs of software licensing tend to decrease, because business groups can manage their licensing requirements more tightly.

[b] Software licensing costs tend to remain about the same.

[c] Software licensing costs tend to increase, because business groups request far more "machines" (knowing that virtual machines are easy and cheap to add).

12. Compared with a traditional server data center, a data center that makes extensive use of server virtualization requires:

[a] Approximately 25% fewer staffers to support the servers and operating systems.

[b] Roughly the same number of staffers to support the servers and operating systems.

[c] Approximately 25% more staffers to support the servers and operating systems.

To see the answers, please click to the next page.

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