Cloud and the Datacenter Flashcards
Virtual Servers
Allows multiple virtual instances to exist on a single physical server
cheaper, consolidate physical servers
Multiple NICs increase bandwidth
Hypervisor
Specialized software that emulates physical hardware
VMWare, Microsoft Hyper-V, Virtual Box
Virtualized Storage Solutions
(NAS) - Network Attached Storage: disk storage over TCP/IP
(SAN) - Storage Area Network: Specialized LAN designed for data transfer
storage area network (san) connection types
Fibre Channel
Fibre Channel over Ethernet (FCoE)
iSCSI (IP Small Computer System Interface)
Virtual Switches
Overcomes the problem of all virtual servers being on one broadcast domain
Layer 2 control provides VLANs and trunking
Virtual Desktop and pros?
User’s desktop computer is run in browser
Easier to secure and upgrade for the admins
Private Cloud
Systems and users only have access with other devices inside the
same private cloud or system
ex: government cloud
Public Cloud
Systems and users interact with devices on public networks, such
as the Internet and other clouds
ex: google drive
Hybrid Cloud
Combination of private and public
Community Cloud
Collaborative effort where infrastructure is shared between
several organizations from a specific community with common
concerns
ex: infrastructure shared by different organizations
(IaaS)
Infrastructure as a Service
Allows outsourcing of the infrastructure of the servers or desktops to a
service provider
Hosted off-site at the service provider’s data center and the customer is
billed for usage
AWS, Azure
(SaaS)
Software as a Service
User interacts with a web-based application
Details of how it works are hidden from users
google docs, office 365
(PaaS)
Platform as a Service
Provides a development platform for companies that are developing
applications without the need for infrastructure
OpenShift, Apprenda
(DaaS)
Desktop as a Service
Provides a desktop environment that is accessible through the Internet in
the form of a cloud desktop or virtual desktop environment
Virtual Desktop Infrastructure (VDI)
Elasticity
match the resources allocated with the actual amount of
resources needed at any given point in time
meeting the sudden increases and decreases
in the workload
dynamic, Short-term addition or subtraction of resources
Scalability
Handles the growing workload required to maintain good performance
and efficiency for a given software or application
Long-term planning and adoption
Vertical Scaling
(Scaling Up)
Increasing the power of the existing resources in the working
environment
Horizontal Scaling
(Scaling Out)
Elasticity
Adding additional resources to help handle the extra load
more redundancy and less downtime
Multitenancy
Allowing customers to share computing resources in a public or private
cloud
Better storage/access, resources, cost
More security risk
Virtual Machine (VM) Escape
Occurs when an attacker breaks out of one of the isolated VMs and
begins to directly interact with the underlying hypervisor
(IAC)
Infrastructure as Code
Enables managing and provisioning of infrastructure through code instead of
through manual processes
Scripted automation and orchestration
Automation/Orchestration
Process of coordinating the installation and
configuration of multiple systems
Lower costs, Speed up deployments, Increase security
Snowflake Systems
Any system that is different from the standard configuration template used with IAC
(VPN)
Virtual Private Network
cloud connection option
cheaper than private-direct
aws, azure
Private-Direct Connection
Extends preexisting, on-premise data center into the provider’s network
to directly connect to your virtual private cloud network
faster, better performance, better redundancy
data center
facility that organizes, processes, stores and disseminates amounts of data
Three-tiered hierarchy
core: fastest, backbone, redundant
distribution/aggregation layer: policies, layer 3 switches
access/edge: connect to end points
sdn
software-defined networking admins can control networks via software 1. application layer 2. control layer 3. infrastructure layer 4. management plane
spine and leaf
spine: switches that create full mesh with leaves
leaf: access switches
increased speed, decreased latency compared to 3-tiered
traffic flow
north-south: exit-entering data center
east-west: data flow within data center
on premise
traditional, usually inside building
co-located
rent space in data center
cloud based
migrate data to csp facilities
