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Overview Cryptographic hash functions transform data of any size into a fixed-length message digest or checksum, with SHA256 producing a 256-bit (64 hexadecimal digit) output regardless of input size. These functions are deterministic and demonstrate the avala...

Overview The fundamental Diffie-Hellman key exchange is susceptible to a Man-in-the-Middle (MITM) attack because it lacks a mechanism for participants to authenticate each other's identity, allowing an attacker to establish two separate secret keys and decrypt...

Subnets LAB Main Media 10.0.0.0/24 VLAN 50 192.168.0.1/24 VLAN 0 192.168.2.0/24 VLAN 20 DMZ VPN Security 192.168.4.0/24 192.168.3.0/24

Firewall Zone Definitions (e.g., DMZ, LAN, IoT) Core Access Rules (e.g., Management access allowed only from specific VLAN)

Host Setup Notes (Installation, storage configuration) Management Access Procedures

Host Setup Notes (Installation, storage configuration) Management Access Procedures

Repository Structure and Location New Deployment/Provisioning Process

Pool Layout and Redundancy Level (e.g., RAIDZ2) Dataset/Share Mount Points

Table of all running services (Name, IP, Port, Purpose)

Dashboard URLs and Authentication Notes Key Metrics Being Tracked

Configuration details and upstream DNS providers

What is backed up (config/data), frequency, and retention policy Location of backup storage

Step-by-step procedure for recovering a core system (e.g., Firewall) Service restoration order

Patching and Update Schedule Adding a New VM or Container Checklist

Overview Cryptography is essential for protecting passwords both in transit (via SSL/TLS) and at rest (in databases), where the latter requires secure storage methods to prevent exposure during a breach. Simply hashing passwords is insufficient due to rainbow ...