reviewed ch 4 presentation
DESCRIPTION
TRANSCRIPT
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