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TCP / IP
| Question | Answer |
|---|---|
| TCP/IP definition | Transmission Control Protocol / Internet Protocol |
| Protocol | common rules that defines the format of message exchanges and action taken on transmission |
| transport | the way information is exchanged between computer in a network |
| TCP/IP | common protocol for communication between computers connected to Internet regardless of hardware |
| TCP/IP standard defines | how devices should be connected to the Internet; how data should be transmitted between them |
| TCP | Takes care of communication between application and network, & communication with other computers |
| IP | breaking down data into packets before they are sent and assemble packets when they arrive; and sending packets to the receiver |
| OSI Model | (Open Systems Interconnection) a set of protocols that allow two different systems to communicate |
| 7-layers OSI Model | Physical > Data Link > Network > Transport > Session > Presentation > Application |
| Application | how the application uses a network |
| Presentation | how to represent data |
| Session | how to establish communication with a remote system |
| Transport | how to handle data transfer |
| Network | specifies addressing assignments and how packets are sent |
| Data Link | specifies organization of data into frames and how frames are sent over a network |
| Physical | basic network hardware |
| TCP/IP Layer Model | Physical > Network > Internet > Transport > Application |
| Internet (TCP/IP Model) | Specifies packet format and routing |
| Network (TCP/IP Model) | frame organization and transmission |
| IP address | a string of numbers separated by dots, which identifies every device on a TCP/IP network |
| IPv4 | 32 bits |
| IPv6 | 128bits, hexadecimals |
| IP Classes | A: government; B: medium companies; C: small companies; D: multicasting; E: Future Use / Experimental |
| DNS | (Domain Name System) translates IP addresses into names of websites |
| DNS hierarchy | root > Top-Level Domain > 2nd Level Domain > Subdomain > Individual Machine |