Fichas
Virtualization 1-3
Fichas del conjunto (28)
- 1What is hosted virtualization?Runs on top of an existing host OS as an application sharing resources donated by the host
- 2List products that use Hosted virtualizationVMware Workstation
Oracle's Virtual box - 3List some advantages and disadvantages of hosted virtualizationHigh I/O overhead
guests assume they are standalone - 4What is full virtualization?Unmodified guests where the hyper-visor is translating binary
(vmware and hyper-v) - 5What is binary translation?The hyper-visor translates the binary code that the guest want to the protected CPU operation
- 6WHat is direct execution?User level code is executed on the processor
- 7List some advantages and disadvantages of full virtualizationFaster than hosted
performance is tricky and can incur large performance overhead
Translating is cached using up memory - 8What is Para-virtualization?The guest operating system is modified and aware it is virtual
- 9What is a hypercall?Guest calls the hypervisor to run operations in ring 0
(used by xen server) - 10List some advantages and disadvantages of Para-virtualizationGuests must be modified on installation
Faster (less overhead) - 11What is hardware assisted virtualization??Products that have virtualization extensions built in to optimize for virtual environments
- 12What products use hardware assisted virtualization?All virtualization products today
- 13What is Hardware assisted virtualization used for?hardware virtualization is used to allow guests access to ring zero unless the call is sensitive/privelleged
- 14What is VMWare workstation used for?Patch testing
OS testing
Training
major configuration change testing
snapshots and backups - 15list common VMware files (three)VMX
VMDK
LOG
VMEM
VMSS
VMSN
VMSD - 16What is the .vmx file for?primary vm configuration file
- 17What is the .vmdk file forThis is the VM's HDD
This can be split up into multiple files for a single disk
grows as you add stuff to the disk unless pre allocated - 18How does VMware handle the MAC address?assigned on the first boot unless manually set in the VMX
if you manually set it it must be unique to the system and a valid hex - 19How does VMware handle IP's for the Guest?IP's are handled depending on the network you attach th vm-nic to.
Bridged --> gets an ip from the physical network using your physical nic
Host Only --> depends on the ip settings in vm but communicates only within the host
NAT --> intenal ip natted to your physical nic ip - 20What happens in a snapshot?the vms settings, disk, and memory are all saved as is to revert to in the future
- 21what happens in a suspension?Saved state for a quick resume stops using resources but remembers what was being used for a quick resume
- 22what is a linked clone?shares virtual disks with the parent
faster than full
less disk space
keeps a "differencing file"
changes to either don't affect the other - 23What is a VMnet?essentially a virtual switch for only internal communications
- 24what is a vApp?a virtual appliance
using OVF
set of virtuals packaged together to meet a specific task - 25Type 1 vs Type 2 HypervisorTYPE 1
bare metal (xen server, esx, hyper-v)
runs on the hardware
TYPE 2
run on hosted systems like Workstation - 26where do you find ESX logs?Under system logs
- 27How do you connect to manage ESXi?Vsphere client
new web interface add on
or vmware workstation for limited access - 28OVF VS OVAOVF
OVF is an open standard for packaging and distributing a virtual appliance consisting of one or more virtual machines
OVA
OVA) is an OVF Package in a single file archive with the .ova extension