_index.md (1969B)
1 +++ 2 title = "Computer Networks" 3 +++ 4 5 # Computer Networks 6 **Introduction** 7 8 - [Overview](overview/) 9 - [Examples of networks](examples-of-networks/) 10 11 **The OSI 7-Layer Model:** 12 13 Seven layers, created for different abstractions. Each layer does well-defined functions 14 15 Minimises info flow across layer interfaces. 16 17 Layers: 18 19 1. Physical — sends bits as analog signals 20 21 1. [Physical: Basis for data communication](physical-basis-for-data-communication/) 22 23 2. [Physical: Transmission Media](physical-transmission-media/) 24 25 3. [Physical: Modulation & multiplexing](physical-modulation-multiplexing/) 26 27 2. Data Link — sends frames of information 28 29 1. [Data Link: Overview & framing](data-link-overview-framing/) 30 31 2. [Data Link: Error detection/correction](data-link-error-detection-correction/) 32 33 3. [Data Link: Protocols](data-link-protocols/) 34 35 4. Medium Access Control Sublayer 36 37 1. [MAC: Overview & allocation methods](mac-overview-allocation-methods/) 38 39 2. [MAC: Protocols](mac-protocols/) 40 41 3. [MAC: Use in Ethernet](mac-use-in-ethernet/) 42 43 4. [MAC: Use in Wifi & Broadband](mac-use-in-wifi-broadband/) 44 45 5. [MAC: use in Bluetooth & RFID](mac-use-in-bluetooth-rfid/) 46 47 3. Network — sends packets over multiple data links 48 49 1. [Network: overview](network-overview/) 50 51 2. [Network: routing](network-routing/) 52 53 3. [Network: providing service](network-providing-service/) 54 55 4. [Network: internet protocols](network-internet-protocols) 56 57 4. Transport — provides end-to-end packet delivery 58 59 1. [Transport: overview](transport-overview) 60 61 2. [Transport: elements of transport protocols](transport-elements-of-transport-protocols) 62 63 3. [Transport: internet transport protocols](transport-internet-transport-protocols) 64 65 5. Session — manages task dialogs using tokens 66 6. Presentation — converts different representations 67 68 7. [Application](application) — provides functions needed by users