introduction to network ( internet and its layer) or how internet really works!
TRANSCRIPT
Introductionto
NetworkIT Entrepreneurship course ( Dr. Meigoonpoury )
Mohammad Kermani, Fall 2015University of Tehran, Faculty of Entrepreneurship
Google history of Network!Let’s start!
To be abstract!
مار
OSI ModelThe Open Systems Interconnection model (OSI Model) is a conceptual model that characterizes and standardizes thecommunication functions of a telecommunication or computing system without regard of their underlying internal structure and technology. Its goal is the interoperability of diverse communication systems with standard protocols. The model partitions a communication system into abstraction layers. The original version of the model defined seven layers.[WIKIPEDIA]
OSI Model
Internet Protocol Model
What’s inside?
Let’s play!!
How Internet works?
Physical / Network Interface• Wire
• Ethernet• xDSL
• Fiber• GPON• Ethernet
• Wireless• Wifi• Wimax• GSM• 3G/4G
xDSL
xDSL
GPON
Wireless
Multiplexing/Multiple Access• TDM (TDMA)• FDM (FMA)• CDMA• SDMA
Time Division
Frequency Division
Time/Frequency
Code! WOW!
Space Division!!?
Sectors!
Cellular
Cell Planning• Size of cells• Pattern of clusters• Cost Trade-off• Telecom Finance; Erlang, ARPU, etc.
Internet: ISPs and IXPs
Application Layer
Mohammad Kermani
[email protected]@ut.ac.irtelegram.me/mohkermaniInstagram.com/MohkermaniTwitter: @mohkermaniLinkedin: mohkermani