Servers / Cloud Computing

Question 1

server

Answer 1

hardware, software, or both

Question 2

socket

Answer 2

address and port; servers listen on a socket

Question 3

types of servers (8)

Answer 3

web, mail, application, database, file, media, print, game

Question 4

client applications

Answer 4

send requests to a server (slack, zoom, chrome, twitter, instagram)

Question 5

most popular cloud computing providers (4)

Answer 5

digital ocean, aws, azure, google cloud

Question 6

mainframe

Answer 6

1 giant box for just 1 computer

Question 7

virtualization

Answer 7

slicing big computer into lots of little computers

Question 8

cloud computing

Answer 8

paying somebody else to run server

Question 9

advantages of cloud computing (3)

Answer 9

capital cost is minimized, ability to change things, efficiency (slicing things up)

Question 10

infrastructure

Answer 10

the actual VM or database is yours, you do what you want

Question 11

platform

Answer 11

limited software and apps, the provider manages software and OS

Question 12

software

Answer 12

you don’t program anything, you just use the app

Question 13

risks with cloud computing (3)

Answer 13

security, loss of control, vendor lock-in

Question 14

DNS

Answer 14

Domain Name System; phone book for the internet

Question 15

horizontal scaling

Answer 15

adding more machines

Question 16

vertical scaling

Answer 16

more CPU, RAM to existing machine(s)

Question 17

load balancer

Answer 17

sends requests to machine that is available; balances the load

Question 18

web app server

Answer 18

handles the core business logic; specific language (like Node.js) and MVC framework (like Express for Node.js)

Question 19

caching service

Answer 19

saving common requests so they are not recomputed every time

Question 20

job queue and servers

Answer 20

prioritize list of jobs in order of importance and/or chronology

Question 21

full-text search service

Answer 21

searches everything for the entered text

Question 22

CDN

Answer 22

Content Delivery Network; distributes content across “edge” servers so that users don’t need to wait for requests and responses to be sent overseas

Question 23

server functions

Answer 23

listens on a socket (address + port), receives requests, does something and sends a response

Question 24

costs of running a server

Answer 24

hardware, software lincenses, power and cooling, people