CIS 231 Exam 3

Benefits of networks

help a company grow into an agile

Network

a system that consists of communications media

Ethernet

IEEE 802.3

Metcalfe’s law & formula

states that the value of a network increases with the square of the number of connected users

OSI Model

a conceptual framework that standardizes the functions of a telecommunication or computing system into seven abstraction layers;

Topology and types

the arrangement of different elements (links

PAN

LAN

Bandwidth

the maximum rate of data transfer across a network

Latency

the time it takes for a data packet to travel from the source to the destination and back

Media

various types and description

Wireless; IEEE 802.11

a set of standards for wireless local area networks (WLANs) that allows devices to connect without physical cables;

NFC

Bluetooth

Hot spot

a physical location where people can access the Internet wirelessly

4G vs 5G

4G provides faster data speeds and improved multimedia capabilities compared to 3G

Internet (global users & diffusion %)

a global network of interconnected computers

ARPANET

the precursor to the Internet

Backbone

the principal data routes between large

TCP/IP

a suite of communication protocols used to interconnect network devices on the Internet

Routers & Switches

routers direct data packets between networks

IP & MAC

IP address identifies a device on a network

DNS

the Domain Name System translates human-friendly domain names into IP addresses that computers use to identify each other on the network;

The World Wide Web

a system of interlinked hypertext documents accessed via the Internet

Web browser

software application used to access and navigate the World Wide Web

HTTP

Hypertext Transfer Protocol

Hyperlinks

clickable links in a web document that direct users to another web page or resource;

URL

Uniform Resource Locator

HTML

XML

CSS

Cascading Style Sheets

Search engine

a system that indexes and retrieves information from the web

Search engine optimization

the practice of improving the ranking of a website in search engine results to increase visibility;

Intranet vs Extranet

Intranet is a private network accessible only to an organization's staff

Network admin

a professional responsible for managing and maintaining computer networks within an organization;

What is cloud computing

a computing environment where software and storage are provided as an Internet service and accessed via a web browser;

Key vendors; “big three”

the leading cloud service providers: Amazon Web Services (AWS)

Types of cloud computing

include Infrastructure as a Service (IaaS)

Benefits of public cloud

reduced costs

Common issues with public cloud

include complex pricing

Cloud computing services

include IaaS

Private Cloud

a cloud environment dedicated to a single organization

Types

private clouds can be on-premises or managed by a service provider;

Advantages of private over public cloud

include enhanced security

Advantages of hybrid cloud

combine the benefits of both public and private clouds

E-discovery

the process of identifying

Virtualization

the creation of virtual versions of physical resources

Autonomic computing

self-managing computing models that automatically manage themselves based on high-level objectives;

IoT

the Internet of Things

What must a device possess to be an IoT device?

an IoT device must have an IP address and a connection to the Internet to transmit data;

Categories of IoT

include home automation

Comparison between 4G and 5G

4G networks deliver enhanced multimedia and smooth streaming

Power of 5G (advantages and applications)

advantages include high data transfer speeds