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Q. Applications of networks?
End systems (hosts):
- Run application programs
- Example email, Web
- At -edge of network
Client/server model
- Client host requests accepts service from always-on server
- Example email-client/server, Web-browser/server
Client/server model is applicable in an intranet.
Peer-Peer model:
- No fixed clients/servers
- Every host can act as both client & server
Instance Gnutella, Napster, KaZaA
- WWW
- Instant Messaging (text messaging on cellular phones and Internet chat)
- Peer-to-Peer
- Internet Phone
- Video-on-demand
- Distributed Games
- Remote Login (Telnet)
- File Transfer
Star Topology Devoted point-to-point links to central controller (hub) Controller acts like exchange Advantages - Less expensive - Robustness Disadv
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