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Server Virtualization - 5

a CCNA Cloud CLDFND 210-451 quiz summary

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Mushtaq Smb
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2 min read

  • Server hardware components are,

    NIC, CPU, RAM, Storage Controller image.png

  • Server operating system examples,

    Microsoft Windows Server, Linux, FreeBSD etc

  • Advantages achieved through mainframe virtualization in early 1970s are,

    1. Legacy application support,
    2. User isolation

  • Disadvantages of server virtualization on x86 servers,

    1. Network provisioning
    2. Management cost decrease

Note :- Why did they introduce 64 bit computers? Because 32 bit architecture computers could only use 4 GB RAM as the maximum memory size.

Hypervisor is a software program that can create emulated hardware for installing another operating system. Used to create virtual servers. image.png

  • Type 1 hypervisor examples,

    • Linux KVM,
    • Xen,
    • Microsoft Hyper-V

  • The following identify a hypervisor and its corresponding VM manager,

    • KVM and oVirt
    • ESXi and vCenter
    • KVM and OpenStack Nova

  • Virtual machine files,

    1. Virtual Disk,
    2. NVRAM,
    3. Swap Memory,
    4. Log

  • Facts about VM,

    • VM high availability enables the restarting of the vm that were running on hosts that failed.
    • Resource load balancing allows automatic host selection when you are creating a virtual machine.
    • VM fault tolerance reserves double the resources a vm requires
    • Live migration?

      Transport of a VM between two hosts from a virtualization cluster with minimal disruptions in its guest OS and hosted applications. image.png

  • A disruption in associated virtual machines expected in?

    High Availability

  • A feature that enables cloud computing pooling characteristics is?

    Resource load balancing.

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