aws-cloud-practitioner

Question 1

what is cloud computing?

Answer 1

Remote virtrual shared resources (Compute, storage, Database and Network)

Question 2

what is a hypervisor?

Answer 2

software to create a VM environ on a single server

Question 3

what are the 3 types of cloud deployment models?

Answer 3

public, private and hybrid

Question 4

what is scaling ‘up and down’?

Answer 4

altering the power and performance of an instance (memory, CPU)

Question 5

what is scaling ‘in and out’?

Answer 5

adds or removes the number of instances

Question 6

example of Saas? (software)

Answer 6

gmail

Question 7

example of Paas? (platform)

Answer 7

heroku, github

Question 8

example of Iaas (infrastructure)

Answer 8

aws

Question 9

what is EBS?

Answer 9

Elastic block store. Offers persistant block level storage. Can be detatched and attached to instances.

Question 10

what is EC2?

Answer 10

Elasctic compute cloud

Question 11

what is an AMI?

Answer 11

Amazon machine image

Question 12

what is ECS?

Answer 12

Elastic container service (runs docker etc)

Question 13

what is MIME?

Answer 13

Multipurpose Internet Mail Extensions (enables the sending of data and media via http)

Question 14

what is TCP?

Answer 14

Transmission Control Protocol

Question 15

whats is lead time?

Answer 15

time from request to release

Question 16

what is meant by muteable?

Answer 16

liable to change

Question 17

what is CAPEX?

Answer 17

capital expenditure (starting up)

Question 18

what is OPEX?

Answer 18

operational expenditure (long term)

Question 19

what is NAS?

Answer 19

Network-attached storage

Question 20

what is IOPS

Answer 20

input output operations per second

Question 21

where is the public key?

Answer 21

aws

Question 22

what key do you have? (public or private)

Answer 22

private

Question 23

what are the types of ELB’s?

Answer 23

Application, Network, Classic

Question 24

what is TLS?

Answer 24

Transport Layer Security

Question 25

what is ACM?

Answer 25

Aws Certificate Manager

Question 26

what level does the application load balancer work at?

Answer 26

level 7 (application)

Question 27

what level does the network load balancer work at?

Answer 27

level 4 (transport)

Question 28

what is the OSI model?

Answer 28

Open Systems interconnection (7 layers)

Question 29

what certificate is used for ELB https?

Answer 29

X.509

Question 30

whats is KMS?

Answer 30

key management service

Question 31

what is UDP?

Answer 31

user datagram protocol

Question 32

what is SNS?

Answer 32

simple notification service

Question 33

what is TLS?

Answer 33

Transport Layer Security

Question 34

what is RTO?

Answer 34

(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

Question 35

what is NFS?

Answer 35

Network file system

Question 36

what is NAT?

Answer 36

network address translation

Question 37

what is a NAT Gateway?

Answer 37

a portal to the internet from a private cloud, cant be accessed from the internet. only from the private cloud.

Question 38

what is a Bastion host?

Answer 38

An instance in a public network that can connect to instances in a private network (remotely)

Question 39

whats is ARP?

Answer 39

address resolution protocol

Question 40

what is an NIC?

Answer 40

network interface card

Question 41

what is URL?

Answer 41

Universal Resource Locator

Question 42

what is DHCP?

Answer 42

Dynamic Host Configurtion Protocol

Question 43

what is NAC?

Answer 43

Network Access Control

Question 44

what is direct connect?

Answer 44

Private connection to private clouds (without traversing the internet)

Question 45

what is vpc peering?

Answer 45

connection between 2 vpcs, they are 1 to 1 (can not talk to other vpcs that are connected to each other)

Question 46

what is AWS transit gateway?

Answer 46

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.

Question 47

whats is an ENI

Answer 47

Elastic Network Interface, can be attached and detached to instances. Can contain a ip/mac address

Question 48

what is Eth0?

Answer 48

Name of the primary interface ENI when a EC2 instance is created.

Question 49

what is Route 53?

Answer 49

a highly available and scaleable dns. Provides secure and reliable routing of requests.

Question 50

what is RDP?

Answer 50

SSH for windows

Question 51

what is an OAI?

Answer 51

origin access identity

Question 52

what is RTO?

Answer 52

Recovery Time Objective, length of time to restore after a disaster.

Question 53

what is RPO?

Answer 53

Recovery Point Obejctive, time before disaster where a back up can occur.

Question 54

what is iSCSI?

Answer 54

internet small computer system interface, a block protocol for storage networking across a network connection which is usually Ethernet

Question 55

what is a SAN?

Answer 55

storage area network