Chapter 1 Flashcards
Essentials
Resizing
In the cloud, configuring a virtual server to use more RAM as needed
SRAM
Static Random Access Memory
DRAM
Dynamic Random Access Memory
DDR
Double Data Rate
ECC
Error Correcting Code
What are the 3 most common server forms?
Blade, Rack-Mount, and Tower
CISC processor
Complex Instruction Set Computing
ESD
Electrostatic Discharge
DAS
Direct-attached Storage (local disks inside servers)
SAN
Storage Area Network
SAS
Serial-Attached SCSI (Small Computer System Interface)
IOPS
Input/ Output Operations Per Second
RAID
Redundant Array of Independent Disks
Purpose of RAID Storage
Better performance and fault tolerance
TCP/IP
Transmission Control Protocol / Internet Protocol
IPv4 Details
32-bit address space, current standard
IPv6 Details
128-bit address space (more unique IP addresses available), not available everywhere
UDP
User Datagram Protocol
TCP
Transmission Control Protocol
HTTP
Hypertext Transfer Protocol (TCP Port 80)
Port Numbers
16-bit, tied to TCP and/or UDP, 65,536 possible (0-65,535), 0-1023 reserved for common network services
SMTP
Simple Mail Transfer Protocol (TCP 25)
DNS
Domain Name Service (UDP 53)
NTP
Network Time Protocol
DHCP
Dynamic Host Configuration Protocol
AD DS
Active Directory Domain Services
NLB
Network load balancing
SSH
Secure Shell
IPMI
Intelligent Platform Management Interface
iDRAC
Integrated Dell Remote Access
SLA
Service Level Agreement
AWS
Amazon Web Services
S3
Simple Storage Service
Air-gapped
A network that is completely isolated from the internet
Hardening
Term used to describe how we lock down or tighten security
DSC
Desired State Configuration
SCCM
System Center Configuration Manager
IEEE
Institute of Electrical and Electronics Engineers
PKI
Public Key Infrastructure
ACL
Access Control List
DR
Disaster Recovery
NIST
National Institute of Standards and Technology
What are the 5 characteristics that define cloud computing?
- Measured service - usage is tracked for billing purposes
- Rapid elasticity - services can automatically expand to accommodate spikes and contract when quiet; known as autoscaling
- Resource pooling - network, computation, and storage infrastructure is grouped and made available to customers
- Broad network access - services are accessible over a network using any type of device; no special software needed
- On-demand self-service - users can provision or deprovision cloud resources without the provider
What are the different cloud computing deployment models?
- Public
- Private
- Community
- Hybrid
What are the different cloud computing service models?
- IaaS (Infrastructure as a Service)
- PaaS (Platform as a Service)
- SaaS (Software as a Service)
IaaS
Infrastructure as a Service - Storage, network components, firewalls, virtual machines; Provider is responsible for infrastructure, customer is responsible for configuration and patching of virtual machines
PaaS
Platform as a Service - Software developer tools, network directory services, and databases; Provider is responsible for infrastructure, deployment, and management of virtual machines, customer is responsible for configuration of developer tools, directory services, and databases
SaaS
Software as a Service - End-user productivity apps; Provider is responsible for infrastructure, deployment, management of virtual machines, and software support; Customer is responsible for data management from use of service
