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Network + > Lesson 9 > Flashcards

Lesson 9 Flashcards

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

A

Network and packet routing

25
Q

What is VRRP

A

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
Q

What is a virtual firewall

A

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
Q

What are the two modes for virtual firewalls

A

Bridge Mode

Hypervisor Mode

28
Q

Bridge Mode

A

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
Q

Hypervisor Mode

A

resides in the core hypervisor kernel and monitors the virtual host machines incoming and outgoing traffic

30
Q

Virtual PBX

A

Virtual phone services

Virtual switchboard and PBX or private telephone network

31
Q

Where is a virtual phone system housed

A

On the service providers servers

32
Q

What are the components of a SAN

A

Cabling
HBAs
Switches
Storage Devices

33
Q

Types of SANs

A

Fibre Channel

iSCSI

34
Q

Fibre Channel

A

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
Q

What type of SAN do you need for mission critical a[[s

A

Fibre Channel

36
Q

iSCSI

A

protocol that describes how packets should be transported on a TCP Network

37
Q

Types of Fibre Channel topologies

A

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
Q

What SAN type is used to transfer data over the LAN WAN or Internet

A

iSCSI

39
Q

iSCSI protocol does what

A

allows client (initiators) to send SCSI commands to SCSI devices called targets on remote servers

40
Q

Which SAN topology allows storage to be accessible by all hosts within the cluster and cluster nodes

A

iSCSI

41
Q

NAS

A

Network Area Storage

device or appliance that provides only file based data storage

42
Q

What provides file based data storage

A

NAS

43
Q

How are NAS systems configured

A

Through web based utility

44
Q

Jumbo Frame

A

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
Q

Do jumbo frames make a network performance more efficient

A

Yes

Reduce CPU utilization because frame size does not matter to a CPU

46
Q

What must happen in order to use jumbo frames in a network path

A

Each network link must be configured at the same MTU

47
Q

What are the different cloud computing concepts

A 
IaaS
SaaS
PaaS
IDaaS
NaaS
48
Q

Name the cloud computing implementations

A

Private cloud
Public cloud
Community cloud
Hybrid cloud

49
Q

Private cloud

A

Solely for a single org

Openstack is an example

50
Q

Public cloud

A

Provides services over a network that is open for public use

Security must be considered

Examples Rackspace or Amazon

51
Q

Community cloud

A

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
Q

Hybrid cloud

A

Combination of two or more clouds

53
Q

IaaS

A

Infrastructure as a service

No need to purchase equipment or running your own data center

Billed for services

54
Q

SaaS

A

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
Q

PaaS

A

Platform as a service

You rent a fully configured system that is set up for a specific purpose

56
Q

IDaaS

A

Identity as a service

Is an authentication infrastructure that you can rent from a service provider

Provides SSO fro the cloud

57
Q

NaaS

A

Network as a service

Provides network based services through the cloud including monitoring and QoS management

Examples:
VPN
BoD
Mobile network virtualization

58
Q

Complete

A

Complete

Network + (13 decks)

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