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MifareClassicTool is an Android application for reading, writing, cloning, and analyzing MIFARE Classic RFID tags using built-in NFC hardware or external USB readers. The tool provides sector-based authentication using key files and dictionary attacks, enabling selective data extraction from protected tag sectors. The application includes a hex editor for viewing and modifying raw tag dump data with sector and block highlighting, along with tools for decoding and encoding access condition bytes and value blocks. It supports cloning full dumps or UIDs to compatible magic tags, including manufa

This project is a comprehensive computer networking textbook and instructional resource. It serves as a technical guide for the design and implementation of network layers, protocols, and hardware architecture, covering the spectrum from physical links to application-layer protocols. The content provides a detailed study of standards for congestion control, reliable data delivery, and internetwork routing. It includes specialized technical material on network security, public-key infrastructure, and the operation of modern cloud infrastructure and data centers. The material covers a broad ra