W7: Networks, Cloud Computing, and File Sharing

Question 1

Network:

Answer 1

A set of computers connected together for the purpose of sharing resources.

Question 2

Internet:

Answer 2

A network of peer networks.

Question 3

WAN =

Answer 3

Wide Area Network

e.g. public Internet

Question 4

Intranet =

Answer 4

Inside a private network.

PCs, BYOD, servers for file + print + storage + data sharing

Question 5

LAN =

Answer 5

high speed Local Area Network for an Intranet

Question 6

VPN =

Answer 6

Virtual Private Network - remote connection to a private intranet across a public network via IP tunnelling.

Question 7

MAN =

Answer 7

Metropolitan Area Network

e.g. subway station WiFi

Question 8

Success of the Internet
Standards:
Open Source:
World-wide:
Affordable:
Decentralized:
Net neutrality:

Answer 8

Standards: TCP/IP, HTTP, HTML, WWW browser
Open Source: GNU/Linux 1991, Apache Web Server 1995
World-wide communications
Affordable bandwidth: speed + capacity grows for same $
Decentralized, cooperative infrastructure
e.g. peering growth by cooperation. Innovation by competition.
Net neutrality: all packets are created equal

Question 9

Two-Tier Architecture - Client-Server Model

Answer 9

Server/Host business centralized: multi-user processing, data store, communication with other systems

Client is User Facing Distributed: advanced presentation, user data management; tells server what to do

Question 10

What is the order of client-server applications?

Answer 10

Client authenticates and makes a connection

Client navigates to directories on both sides

Client requests, server sends or accepts data

Question 11

Three-Tier or N-tier architecture:

Answer 11

Presentation Layer
Application Layer
Data Layer

Question 12

Clouds as a service examples:

Answer 12

Software: SaaS
Monitoring, content, collaboration, communication, finance

Platform: PaaS
Object storage, identity, runtime, queue, database

Infrastructure: IaaS
Compute, block storage, network

Question 13

Technology Stack

Answer 13

Full Stack: You manage everything

Iaas: You manage applications, data, runtime, middleware, O/S

PaaS: You manage applications and data

SaaS: Other manages everything

Question 14

IaaS provides:

Answer 14

services such as networking, servers, storage space, and/or raw computing power to your client network
- High range of scalability and elasticity

e.g. Amazon Web Services
Google Compute Engine
your ISP

Question 15

Paas provides:

Answer 15

file/DB share, version, replicate, cache, synch

• APIs for many web services, blockchain BaaS
• hosted software development stacks to create web applications
• frameworks to build, debug, deploy, scale up/down

e.g. Red Hat OpenShift
Google App Engine, Box.com

Question 16

SaaS provides:

Answer 16

the user with fully functioning web based applications

e.g. SalesForce CRM
Office 365, BigBlueButton
streaming services

Question 17

A peer-to-peer (P2P) network is:

Answer 17

two or more systems sharing resources without using a central server

Advantages: low cost, easy to install, no need for skilled staff, expensive servers, high bandwidth

Disadvantages: difficulty of administration, issues of security + trust, performance, scalability, reliability

Question 18

Bill C-11, the Copyright Modernization Act:

Answer 18

allows for private and personal use of time shifting, format shifting, and backup copies as long as no digital locks are involved.