aws-cloud-practitioner Flashcards
what is cloud computing?
Remote virtrual shared resources (Compute, storage, Database and Network)
what is a hypervisor?
software to create a VM environ on a single server
what are the 3 types of cloud deployment models?
public, private and hybrid
what is scaling ‘up and down’?
altering the power and performance of an instance (memory, CPU)
what is scaling ‘in and out’?
adds or removes the number of instances
example of Saas? (software)
gmail
example of Paas? (platform)
heroku, github
example of Iaas (infrastructure)
aws
what is EBS?
Elastic block store. Offers persistant block level storage. Can be detatched and attached to instances.
what is EC2?
Elasctic compute cloud
what is an AMI?
Amazon machine image
what is ECS?
Elastic container service (runs docker etc)
what is MIME?
Multipurpose Internet Mail Extensions (enables the sending of data and media via http)
what is TCP?
Transmission Control Protocol
whats is lead time?
time from request to release
what is meant by muteable?
liable to change
what is CAPEX?
capital expenditure (starting up)
what is OPEX?
operational expenditure (long term)
what is NAS?
Network-attached storage
what is IOPS
input output operations per second
where is the public key?
aws
what key do you have? (public or private)
private
what are the types of ELB’s?
Application, Network, Classic
what is TLS?
Transport Layer Security
what is ACM?
Aws Certificate Manager
what level does the application load balancer work at?
level 7 (application)
what level does the network load balancer work at?
level 4 (transport)
what is the OSI model?
Open Systems interconnection (7 layers)
what certificate is used for ELB https?
X.509
whats is KMS?
key management service
what is UDP?
user datagram protocol
what is SNS?
simple notification service
what is TLS?
Transport Layer Security
what is RTO?
(Recovery Time Objective) is defined as the maximum amount of time in which a service can remain unavailable for before it’s classed as damaging to the business
what is NFS?
Network file system
what is NAT?
network address translation
what is a NAT Gateway?
a portal to the internet from a private cloud, cant be accessed from the internet. only from the private cloud.
what is a Bastion host?
An instance in a public network that can connect to instances in a private network (remotely)
whats is ARP?
address resolution protocol
what is an NIC?
network interface card
what is URL?
Universal Resource Locator
what is DHCP?
Dynamic Host Configurtion Protocol
what is NAC?
Network Access Control
what is direct connect?
Private connection to private clouds (without traversing the internet)
what is vpc peering?
connection between 2 vpcs, they are 1 to 1 (can not talk to other vpcs that are connected to each other)
what is AWS transit gateway?
service to simplify connections bewteeen vpcs and networks. all entites route to the gateway, instead of an individual 1 to 1 connection with each other.
whats is an ENI
Elastic Network Interface, can be attached and detached to instances. Can contain a ip/mac address
what is Eth0?
Name of the primary interface ENI when a EC2 instance is created.
what is Route 53?
a highly available and scaleable dns. Provides secure and reliable routing of requests.
what is RDP?
SSH for windows
what is an OAI?
origin access identity
what is RTO?
Recovery Time Objective, length of time to restore after a disaster.
what is RPO?
Recovery Point Obejctive, time before disaster where a back up can occur.
what is iSCSI?
internet small computer system interface, a block protocol for storage networking across a network connection which is usually Ethernet
what is a SAN?
storage area network
