4.2 Client-side Virtualization

Question 1

Virtualization

Answer 1

• run multiple OS on one computer simultaneously

Question 2

Sandboxing

Answer 2

• use of virtualization as an isolated testing environment
• try some code, nothing is affected
• roll back to a previous snapshot

Question 3

Test Development

Answer 3

• develop and test applications in a virtual environment that is very similar to what the production network might be

Question 4

Legacy Software/OS Virtualization

Answer 4

Used when:
- running different application versions on the same system
- application only runs on a previous OS version

Question 5

Cross-Platform Virtualization

Answer 5

• running Windows/macOS/Linux simultaneously
• each OS has strengths and weaknesses
• no need to partition hard drive
• no rebooting to switch

Question 6

Hypervisor

Answer 6

Virtual Machine Manager
- manages the virtual platform and guest OS
- may require a CPU that supports virtualization
- manage the CPU, networking, security, etc

Question 7

Virtualization Resource Requirements

Answer 7

CPU Processor Support
- Intel: Virtualization Technology (VT)
- AMD: AMD-V

A lot of RAM: above and beyond host OS requirements

Plenty of disk space

Network: make sure each OS has proper network configuration

Question 8

Virtualization Security Requirements

Answer 8

• VMs should have the same security controls as a physical computer
• host-based firewall, anti-virus

Question 9

Rogue VMs

Answer 9

• third-party VMs downloaded from the Internet could potentially have malware
• it’s always best to build your own VM for safety

Question 10

VM Escaping

Answer 10

• malware on a VM gains access to parts of the hypervisor
• malware can then hop to other virtualized systems managed by that hypervisor

Question 11

Virtualization Network Requirements

Answer 11

• most client-side VMs have their own virtual network

Network Configurations:
Shared Network Address
- the VM shares the same IP address as the physical host
- uses a private IP address internally
Bridged Network Address
- each VM had its own IP address
Private Address
- no communication outside of the virtual network

Question 12

VM Sprawl

Answer 12

Occurs when the number of VMs on a network reaches the point where administrators can no longer manage them properly