Lesson 9 Flashcards
virtualization
Running one or more simulated machines on a computer
Host
The physical computer that a VM is running on
VMs need what to communicate
Virtual switch
Benefits of virtualization
server consolidation
power conservation
improved disaster recovery
Virtual machines run as what on a host
application
Do VMs have their own MAC address or do they share MAC addresses
The have their own MAC address
Hypervisor
software or firmware that creates the vm
What provides th guest operating system with a virtual operating platform and manages the execution of the guest operating system
Hypervisor
Approach to designing and building and managing networks tha allow admins to manage at lower levels
Software defined networking
Types of virtualization
Hardware based
Client Based
Do VM servers need a central storage device
Yes
Do hosts need local storage for VMs
No they can use a network storage device
Virtual NIC
a program that virtualizes a physical NIC
Are VNIC assigned MAC addresses
Yes
What enables a VM to communicate
A VNIC
What does SDN mean
Software Defined Networking
Where do VMs store their data
Central Storage Device
What are some primary benefits of virtual servers
Better utilization of hardware
Easier provisioning
Easier backup
Easier disaster recovery
Can a virtual server be located within a network segments serving individual departments
Yes
This allows the host to be located in the central server room and not out on the floor in order to reduce opportunities for theft and hacking
What is a virtual sitch
An application that enables communication between virtual machines
Virtual switches do two things to data packets
Forwards them
Checking them
Can virtual switches be software or firmware
Yes
Are virtual routers software based
Yes
A virtual router performs
Network and packet routing
What is VRRP
Using virtual routers to increase network reliability
Advertising a virtual router as the default gateway which is backed up by a group of physical routers
What is a virtual firewall
Firewall service or appliance running entirely within a virtualized environment
Software firewall on a guest VM
Virtual security appliance
Virtual switch
Managed kernel process running within the host hypervisor
What are the two modes for virtual firewalls
Bridge Mode
Hypervisor Mode
Bridge Mode
Diagnoses and monitors all incoming and outgoing traffic bound for other virtual networks
Firewall does not actively participate in routing the traffic
Does not require any IP routing changes or sub netting to be inserted into place
Hypervisor Mode
resides in the core hypervisor kernel and monitors the virtual host machines incoming and outgoing traffic
Virtual PBX
Virtual phone services
Virtual switchboard and PBX or private telephone network
Where is a virtual phone system housed
On the service providers servers
What are the components of a SAN
Cabling
HBAs
Switches
Storage Devices
Types of SANs
Fibre Channel
iSCSI
Fibre Channel
High speed network of interconnected Fibre Channel switches
Used for mission critical application in whichc uninterrupted data access is required
Up to 16 GBPS
Used for enterprise storage
Uses coax and ordinary telephone twisted pair
What type of SAN do you need for mission critical a[[s
Fibre Channel
iSCSI
protocol that describes how packets should be transported on a TCP Network
Types of Fibre Channel topologies
Point to Point
– Two devices connected together; limited connectivity
Arbitrated loop
–Devices are in a loop or ring; loop interrupted whenever a device is removed or fails
Switched Fabric
– All device or loops are connected to Fibre Channel switches
What SAN type is used to transfer data over the LAN WAN or Internet
iSCSI
iSCSI protocol does what
allows client (initiators) to send SCSI commands to SCSI devices called targets on remote servers
Which SAN topology allows storage to be accessible by all hosts within the cluster and cluster nodes
iSCSI
NAS
Network Area Storage
device or appliance that provides only file based data storage
What provides file based data storage
NAS
How are NAS systems configured
Through web based utility
Jumbo Frame
Ethernet frame with a payload greater thatn the MTU of 1500 bytes
Used on LAN that can support 1 Gbps iSCSI and Fibre Channel
Do jumbo frames make a network performance more efficient
Yes
Reduce CPU utilization because frame size does not matter to a CPU
What must happen in order to use jumbo frames in a network path
Each network link must be configured at the same MTU
What are the different cloud computing concepts
IaaS SaaS PaaS IDaaS NaaS
Name the cloud computing implementations
Private cloud
Public cloud
Community cloud
Hybrid cloud
Private cloud
Solely for a single org
Openstack is an example
Public cloud
Provides services over a network that is open for public use
Security must be considered
Examples Rackspace or Amazon
Community cloud
Multiple orgs from a specific community with common interest share the cloud infrastructure
Spreads cost over fewer users than a public cloud but more than a private cloud
Hybrid cloud
Combination of two or more clouds
IaaS
Infrastructure as a service
No need to purchase equipment or running your own data center
Billed for services
SaaS
Software as a service
Allows providers to make an application available over the Internet
Eliminates the need to install software on user devices
Good for mobile or transient workers
Goog Apps
PaaS
Platform as a service
You rent a fully configured system that is set up for a specific purpose
IDaaS
Identity as a service
Is an authentication infrastructure that you can rent from a service provider
Provides SSO fro the cloud
NaaS
Network as a service
Provides network based services through the cloud including monitoring and QoS management
Examples:
VPN
BoD
Mobile network virtualization
Complete
Complete
