Data centers

Question 1

there are 3 tiers when it comes to Data Center:

Answer 1

Core Layer
Distribution / aggregation layer
Access / edge layer

Question 2

____ _______switches are only for the servers in their individual racks.

Answer 2

Top Rack

Question 3

the _____ ______ layer of a Data center inner-connects to all of the Data Centers Top Rack switches or:

Answer 3

Distribution / aggregation

Question 4

The _____ ______ inner connects the Internet or outside of the LAN to all of the Distribution / aggregation layers.

Answer 4

Core Layer / or backbone

Question 5

Traffic Flows use or have the North-South and East-West senarios:

Answer 5

Traffic coming in and out of the network, or out to the Internet and into the Data Center from the Internet is considered the North to South traffic flow.
Traffic traveling across/between servers within the Data Center are considered to be on the West to East traffic flow.

Question 6

Data centers have a bunch of individual hard drives connected with Ethernet for keeping the data actually stored, preserved, in good working order. this is basically at file level. Are relatively cheap.

Answer 6

Network attached storage ( NAS )

Question 7

A unique block level of storage that connects a bunch of individual systems to a central bank of mass storage/Harddrives that is managed by what is called a SAN controller that has it’s own individual connection.Provide redundancy, power and safety for your Data*. These are pretty expensive.

Answer 7

Storage area network ( SAN )

Question 8

Their are basically 2 primary types of connections between the SAN controllers and SAN storage harddrives:

Answer 8

iSCSI
Fibre Channel - one version is called: Fibre Channel over Ethernet
(FCoE)

Question 9

_______ is where SAN’s have backup conncections that are called:

Answer 9

Multipathing

Question 10

________ in the Distribution / aggregation part of a Data center consist of one rack with multiple servers connected to one top-of-rack switch ( or two for redundancy )

Answer 10

Pods

Question 11

To be able to connect your computer to a SAN you will need a:

Answer 11

Host bus adaptor ( HBA )

Question 12

With this type of architecture, each top-of-rack switch is connected to the layer three switches on the spine layer

Answer 12

Spine-and-leaf layer

Question 13

______virtualizes much of the networking plane/layers

Answer 13

Software Designed networking ( SDN )

Question 14

Making your virtual network highly visible you need several things:

Answer 14

Load balancing -
Clustering - multi-servers that are identical to make sure data gets transferred
Active-Active - where all servers are available

Question 15

In virtualization, when you have a server that’s being used until it goes down, then the second server kicks in so theres no delay:

Answer 15

Active-Passive

Question 16

in virtualization, this idea, not an actual protocol, states if you give me 2 ways to connect to the internet i can make it happen.

Answer 16

First Hop Redundancy Protocols ( FHRP )

Question 17

In virtualization, the First Hop Redundancy Protocols ( FHRP ) actually used these 2 protocols to make it happen:

Answer 17

Virtual router Redundancy Protocol ( VRRP )
Hot Standby Router Protocol ( HSRP )

Question 18

All racks in data centers have ____________ for power:

Answer 18

power converters and PDU’s

Question 19

Most big data centers have these on the outside for back up power:

Answer 19

generator

Question 20

Data centers need the following to keep them to temperature:

Answer 20

HVAC systems, A/C and heat

Question 21

Data systems normally have ________________ in case of fire.

Answer 21

Fire suppression

Question 22

High availability also means that services aren’t _____ lost, not how fast they are recovered.

Answer 22

lost

Question 23

Redundancy protocols, load balancing, clustering, uninterruptible power supplies (UPSes), and generators help ensure _____ _________.

Answer 23

high availability

Question 24

Documentation of Data Centers should include the following:

Answer 24

Floor Diagram
Rack Diagram
Main Distribution frame (MDF) and
Intermediate distribution frame (IDF) documentation
Wiring Diagram
Baseline configurations
Site Survey
Audit and assessment reports - testing on your network and documenting what can be done to fix the issues
Logical Network Diagrams - show how devices communicate with each other and the flow of information through the network