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A closer look at network structure:

network edge: applications and hosts

qaccess networks, physical media: wired, wireless communication links

qnetwork core:

vinterconnected routers

vnetwork of networks

The network edge:

end systems (hosts):

run application programs

e.g. Web, email

at “edge of network”

qclient/server model

client host requests, receives service from always-on server

e.g. Web browser/server; email client/server

qpeer-peer model:

minimal (or no) use of dedicated servers

e.g. Skype,  BitTorrent

Access networks and physical media

Q: How to connect end systems to edge router?

residential access nets

institutional access networks (school, company): LAN

mobile access networks

Keep in mind:

bandwidth (bits per second) of access network?

shared or dedicated?

شامل 24 اسلاید powerpoint

 

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