Used duringvirtual machine restart only if 

Available duringboot

Directlyattached disk Best performance

If the clientfails to renew its lease after 87.5% 

What are not inthe Common scope options 

The DHCP database is a dynamic database thatcontains configuration such as 

DHCP Administrators group 

Failure to obtain a DHCP address

Up to 2,040 GB in size

Unlimited size, lowest CPU utilization

Available during boot

Most settings can be configured only if rurened off

Prioritizes memory allocation when physical memory is low

Used only for a limited time, and then removed

Windows Server 2012and Windows Server 2012 R2 Generation1 

HDD dramaticallyincreases performance

 Virtual harddisks consume large amounts of space 

Storage Fixedconfigurable while a virtual machine is running

Storage QoS configuredper virtual hard disk

Used as shared SerialAttached SCSI disk by virtual machines

Virtual hard diskmust be using .vhd format

Unlimited size,lowest CPU utilization Directly Attached Disks

Stores changes fromthe parent disk increases overhead (lower performance )

Dynamically expandinguse in production

Dynamically expandingBetter performance ( older Hyper-V )

Fixed-size Cannotovercommit

Fixed-size Can causefragmentation

Can convert betweenboth formats

SCSI Can modifydevices when virtual machine is running

Only Generation 2starts from IDE

Two controllers-twodevices per SCSI controller

DHCP reduces thecomplexity and amount of administrative using automatic IP

Client configurationis updated manually

A Common source ofnetwork problems is eliminated

DHCP can use DNSFixed update protocol

If DHCP Server1 findsits IP address on the list, the service starts and supports DHCP clients

A DHCP relay agentlistens for DHCP broadcasts from DHCP clients and then relays them to DHCPservers in same subnets

You can apply DHCPoptions at Scope

IDE Only for Generation 2 Virtual machines 

In SCSI Can modify devices when virtual machine is running 

You Can convert vetween vhd&vhdx formats

Fixed-sise can creat faster

Dynamically expanding can overcommit

Virtual hard disk must be using .vhdx format

SSD dramtically decreases performance