Computer Networks + The Internet

Ch 6

network

group of 2+ devices connected together to exchange information/share resources

types of internet

• intranet

• internet

• extranet

intranet

has boundaries for use within a certain zone (for exmployees)

• internal network

extranet

private network that gives outsiders trusted access to internal data/services

• external network

• used for mergers

internet

external network

4 types of networks

• LAN

• WAN

• PAN

• VPN

PAN

personal area network

• small network that connects individual person’s devices

LAN

local area network

• connects a variety of devices at a single site

WAN

wide area network

• connects devices across 2+ geographic locations

VPN

virtual private network

• creates a safe, encrypted connection to the internet

• use it in a public place

bandwidth

the maximum capacity of a network or internet connection to transmit data in a given amount of time

ISP

internet service provider

3 important functions of ISP

1. provides an IP address

2. provides access/gateway to the resources on the internet

3. pays for access to the internet

IP address

number assigned to all information technology that identifies the device and lalows them to communicate with each other

• moving from IPv4 to IPv6

  • removes contraints of IP addresses

IoT

internet of things

• everything connected to the internet

cloud computing

when processing, storage, applications, and other services are provided over a network

benefits of cloud computing

• broad network access

• resource pooling

• elasticity/scalability

• measured service

limitations to cloud computing

• downtime

• security

• limited control

• vendor agreements

cloud deployment models

• private cloud

• community cloud

• public cloud

• hybrid cloud

private cloud

for exclusive use by a single organization with multiple consumers

• Canvas at Chapman, using our own servers

community cloud

for exclusive use by a specific group of organizations with shared goals/concerns

public cloud

for open use by the general public

• AWS

hybrid cloud

composed of 2+ cloud infrastructure

types of packets

• voice

• video

• computer data

routers

connect everything in a household

modem

where ISP connects to

VoIP

voice over IP

• voice going through networks

EFT

electronic funds transfer

swift code

EFT transfer that is international

FTP

file transfer protocol

• standard when moving files between end users

HTTP

hypertext transfer protocol

• transfer hypermedia documents (websites, ebooks)

URL

uniform resource locators

• unique sequence of characters to identify a resource

HTML

hypertext markup language

• commonly used format for publishing web documents and content

• used on web development

web 1.0

static

• read only capability

• could not interact

web 2.0

• dynamic

• could interact with the web

• financial transactions

web 3.0

can integrate APIs to internet of things

M2M

machine to machine

• i.e. sensor (car, air conditioning)

IaaS

• infrastructure as a service

• can rent basic IT infrastructure like servers, data storage, networks

• i.e. AWS

SaaS

• software as a service

• access applications via the internet

• Woekday, Office 365, Saleforce, Google Suite, Zoom

PaaS

• platform as a service

• Microsoft Azure

SLAs

• service level agreements

• uptime, reliability, redundancy, backups, pricing, mean time to repair

EA

enterprise architecture

• all tech stack + end users + IT team + financials + disaster recovery plans

• infrastructure architecture

what are pieces in a technology stack

software, hardware, databases

on-premise

• classic data centers

• owned by company

collaboration software

allows for the creation of a dedicated workspace for employees to add data and workflow

• enhances productivity

B2B

business to business

B2C

business to customer

EDI

electronic data interchange

• automated, computer-to-computer exchange of standard business documents between companies without human help

when would you use real time v batch processing

financial industry - real time

payroll, inventory - batch processing

desktop virtualization

separating a user's entire computer screen and apps from their physical device so they can securely log into their PC from any screen, anywhere.

server virtualization

hiding one powerful backend computer inside a software mask so it can act like dozens of separate, smaller servers at the same time.