Category Archives: Notes

Notes for A+ Exams

THREE WAY HANDSHAKE EXAMPLE

=================== Definitions: =================== -Physical layer The physical hardware and cables connecting everything and hubs and related specification data space. -Data link layer this contains the switch and ethernet frame. This layer contains level focuses on mac addresses for various network … Continue reading

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TCP/IP 5 LAYER MODEL NOTES VII

APPLICATION LAYER – USER INTERACTIONS WITH PACKAGE… Process & Applications Provide applications services to users and programs+application specific protocols An application layer specifies the shared communications protocols and interface methods used by hosts in a communications network. The application layer … Continue reading

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TCP SOCKET

TCP SOCKET NOTES TCP, as a protocol, is universal in how it’s used since every device speaking to TCP protocol has to do this in the exact same way for communications to be successful. Choosing how to describe the states … Continue reading

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NETWORK SOCKET

A network socket is an internal endpoint for sending or receiving data within a node on a computer network. Concretely, it is a representation of this endpoint in networking software (protocol stack), such as an entry in a table (listing … Continue reading

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TCP HANDSHAKES

TCP HANDSHAKES USE TCP CONTROL FLAGS TCP CONTROL FLAGS – URG FLAG — URGENT — VALUE OF 1 IS URGENT — URGENT POINTER FIELD HAS MORE DATA ABOUT THIS – ACK FLAG –VALUE OF 1 IS TO BE ACKNOWLEDGED — … Continue reading

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TCP SEGMENT

The Transmission Control Protocol (TCP) is one of the main protocols of the Internet protocol suite. It originated in the initial network implementation in which it complemented the Internet Protocol (IP). Therefore, the entire suite is commonly referred to as … Continue reading

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