reviewed ch 4 presentation

INTERNET TECHNOLOGIES

John SchianoArjun Agarwala

1/31/2012

Internet Backbone

Refers to main internet

pathway connections

Consists of mostly fiber-optic cables that span the globe over land and under sea

Network Service Providers (NSPs) are large telecom companies that make up the internet backbone

Domain Name Server (DNS)

TCP/IP

TCP-Transmission

Control Protocol:

IP- Internet Protocol:

IP addresses

Works behind the scenes

Data is transferred over the internet in packets

The internet is a packet switching network

Internet Service Provider (ISP)Connection Type Pros Cons

Cable Modem Fast, Always on connection, Multiple users simultaneously

Expensive, Slower output as user activity increases

Cellular Data Connection Can be used for portable devices, constantly getting faster (4G introduction)

Expensive, Mediocre speed

Digital Subscriber Line (DSL)

Always on connection, Can use phone and internet simultaneously, No competition

Slow speed

Dial-Up Inexpensive Slow, Can’t use simultaneously

Digital Satellite Service (DSS)

High speed internet, Wireless, Always on connection

Expensive set up, Weather impacts performance

Broadband Over Power Line (BPL)

Delivers internet to remote areas, Uses electrical outlets

Limited availability in USA

Client/Server

Network design in which the computer or program (client) requests a service from another computer or program (server) that performs the action

The internet is based on a client/server relationship

Server Client

Peer-to-Peer (P2P)Network design that does not utilize a central server

Information is transferred from client to client

Clients act like

servers

Article

Limewire

Frostwire

BitTorrent

Router

Network device that manages network traffic

Crucial to internet communications

Wireless Internet is possible because of routers

Internet is a packet switched network

Port

VGA Port S-Video HDMI

Voice over Internet Protocol (VoIP)

Voice communications using IP over data networks

Unified communications

Internet2

Is a research and development consortium

To develop and deploy advanced network applications and technologies for tomorrow’s Internet

Important because world depends on it

NOT a new internet, but a group focused on improving current structure