Download 5780 Part-1 Spring 2001 - Computer Science and Engineering

Practical Networking
Ram Dantu
University of North Texas,
[email protected]
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Agenda
 Nuts and Bolts of Internet
 Access, Edge, and Core Networks
 LAN Design
 End-user Protocols, Services and QoS
 Edge and Core Networks
 Performance
 Bandwidth and Delay
 Security
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What’s the Internet: “nuts and bolts” view
 millions of connected
computing devices: hosts,
end-systems


pc’s workstations, servers
PDA’s phones, toasters
router
server
mobile
local ISP
running network apps
 communication links

workstation
regional ISP
fiber, copper, radio,
satellite
 routers: forward packets
(chunks) of data thru
network
company
network
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What’s the Internet: “nuts and bolts” view
 protocols: control sending,
receiving of msgs

e.g., TCP, IP, HTTP, FTP, PPP
 Internet: “network of
router
server
workstation
mobile
local ISP
networks”


loosely hierarchical
public Internet versus
private intranet
 Internet standards
 RFC: Request for comments
 IETF: Internet Engineering
Task Force
regional ISP
company
network
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What’s the Internet: a service view
 communication infrastructure
enables distributed
applications:


WWW, email, games, ecommerce, database., voting,
more?
 communication services
provided:


connectionless
connection-oriented
 cyberspace [Gibson]:
“a consensual hallucination experienced
daily by billions of operators, in every
nation, ...."
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A closer look at network structure:
 network edge:
applications and hosts
 network core:


routers
network of networks
 access networks,
physical media:
communication links
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