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Network + > Lesson 9 > Flashcards

Lesson 9 Flashcards

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1
Q

virtualization

A

Running one or more simulated machines on a computer

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2
Q

Host

A

The physical computer that a VM is running on

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3
Q

VMs need what to communicate

A

Virtual switch

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4
Q

Benefits of virtualization

A

server consolidation
power conservation
improved disaster recovery

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5
Q

Virtual machines run as what on a host

A

application

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6
Q

Do VMs have their own MAC address or do they share MAC addresses

A

The have their own MAC address

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7
Q

Hypervisor

A

software or firmware that creates the vm

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8
Q

What provides th guest operating system with a virtual operating platform and manages the execution of the guest operating system

A

Hypervisor

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9
Q

Approach to designing and building and managing networks tha allow admins to manage at lower levels

A

Software defined networking

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10
Q

Types of virtualization

A

Hardware based

Client Based

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11
Q

Do VM servers need a central storage device

A

Yes

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12
Q

Do hosts need local storage for VMs

A

No they can use a network storage device

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13
Q

Virtual NIC

A

a program that virtualizes a physical NIC

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14
Q

Are VNIC assigned MAC addresses

A

Yes

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15
Q

What enables a VM to communicate

A

A VNIC

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16
Q

What does SDN mean

A

Software Defined Networking

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17
Q

Where do VMs store their data

A

Central Storage Device

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18
Q

What are some primary benefits of virtual servers

A

Better utilization of hardware
Easier provisioning
Easier backup
Easier disaster recovery

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19
Q

Can a virtual server be located within a network segments serving individual departments

A

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

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20
Q

What is a virtual sitch

A

An application that enables communication between virtual machines

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21
Q

Virtual switches do two things to data packets

A

Forwards them

Checking them

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22
Q

Can virtual switches be software or firmware

A

Yes

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23
Q

Are virtual routers software based

A

Yes

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24
Q

A virtual router performs

Study These Flashcards
A

Network and packet routing

25
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
26
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
27
What are the two modes for virtual firewalls
Bridge Mode Hypervisor Mode
28
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
29
Hypervisor Mode
resides in the core hypervisor kernel and monitors the virtual host machines incoming and outgoing traffic
30
Virtual PBX
Virtual phone services Virtual switchboard and PBX or private telephone network
31
Where is a virtual phone system housed
On the service providers servers
32
What are the components of a SAN
Cabling HBAs Switches Storage Devices
33
Types of SANs
Fibre Channel iSCSI
34
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
35
What type of SAN do you need for mission critical a[[s
Fibre Channel
36
iSCSI
protocol that describes how packets should be transported on a TCP Network
37
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
38
What SAN type is used to transfer data over the LAN WAN or Internet
iSCSI
39
iSCSI protocol does what
allows client (initiators) to send SCSI commands to SCSI devices called targets on remote servers
40
Which SAN topology allows storage to be accessible by all hosts within the cluster and cluster nodes
iSCSI
41
NAS
Network Area Storage device or appliance that provides only file based data storage
42
What provides file based data storage
NAS
43
How are NAS systems configured
Through web based utility
44
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
45
Do jumbo frames make a network performance more efficient
Yes Reduce CPU utilization because frame size does not matter to a CPU
46
What must happen in order to use jumbo frames in a network path
Each network link must be configured at the same MTU
47
What are the different cloud computing concepts
``` IaaS SaaS PaaS IDaaS NaaS ```
48
Name the cloud computing implementations
Private cloud Public cloud Community cloud Hybrid cloud
49
Private cloud
Solely for a single org Openstack is an example
50
Public cloud
Provides services over a network that is open for public use Security must be considered Examples Rackspace or Amazon
51
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
52
Hybrid cloud
Combination of two or more clouds
53
IaaS
Infrastructure as a service No need to purchase equipment or running your own data center Billed for services
54
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
55
PaaS
Platform as a service You rent a fully configured system that is set up for a specific purpose
56
IDaaS
Identity as a service Is an authentication infrastructure that you can rent from a service provider Provides SSO fro the cloud
57
NaaS
Network as a service Provides network based services through the cloud including monitoring and QoS management Examples: VPN BoD Mobile network virtualization
58
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