Tabla de Contenidos: “…Botnets -- A Closer Look at Spyware -- Trojans and Backdoors -- Rootkits -- Viruses and Worms -- Botnets -- Brief History of Viruses, Worms, and Trojans -- The Current Situation -- Anti-Virus Software -- Need for Anti-Virus Software -- Top 5 Commercially Available Anti-Virus Software -- Symantec Norton Anti-Virus Software -- McAfee Anti- Virus -- Kaspersky Anti- Virus -- Bitdefender Anti- Virus -- AVG Anti-Virus Software -- A Few Words of Caution -- Chapter Summary -- Chapter 8: Cryptography -- Introduction -- Cryptographic Algorithms -- Symmetric Key Cryptography -- Key Distribution -- Asymmetric Key Cryptography -- Public Key Cryptography -- RSA Algorithm -- Advantages of Public Key Cryptography -- Applications of PKC -- Public Key Infrastructure (PKI) -- Certificate Authority (CA) -- Digital Certificate -- Hash Function Cryptography -- Popular Hashes -- Digital Signatures -- Summary of Cryptography Standard Algorithms -- Disk / Drive Encryption -- Attacks on Cryptography -- Chapter Summary -- Part IV: Network Security -- Chapter 9: Understanding Networks and Network Security -- Introduction -- Networking Fundamentals -- Computer Communication -- Network and its Components -- Network Protocols -- OSI (Open Systems Interconnection) Reference Model -- TCP/IP Model -- Network Vulnerabilities and Threats -- Vulnerabilities -- Security Policy Weaknesses -- Technology Weaknesses -- Configuration Weaknesses -- Threats -- Attacks -- Reconnaissance -- Denial-of-Service (DoS) and Distributed Denial-of-Service (DDoS) -- Other Attacks on Networks -- How to counter the Network Attacks -- Chapter Summary -- Chapter 10: Firewalls -- Introduction -- How Do You Protect a Network? …”