Tech Stack

  I'm using my blog name as company name ' Techstack' . This includes: One Primary Domain Controller (DC01) One Additional Domain Controller for replication (DC02) One Client computer (PC01) A fully working Active Directory domain: techstack.local Active Directory replication between DC01 and DC02 This guide is written in simple, non-technical language so that anyone can follow it carefully. PART 1: What You Are Building Imagine you are creating a company called Techstack . In a real company: There is a main server that manages employees and passwords. Sometimes there is a second backup server. Employee computers connect to those servers to log in. In this lab: DC01 = Main office server DC02 = Backup office server PC01 = Employee computer Both servers will share information automatically. If one fails, the other can still handle logins. This is called replication ....

  The OSI Model (Open Systems Interconnection Model) is a way to understand how computers communicate with each other over a network. Think of it like a step-by-step delivery process for sending a message from one computer to another. Just like sending a physical package involves packaging, labeling, transportation, and delivery, sending data over a network also follows a structured process. The OSI model was developed by the International Organization for Standardization to create a universal standard for communication between different computer systems. It divides the communication process into 7 layers , each with a specific responsibility. Let’s explore each layer in a simple, easy-to-understand way. OVERVIEW OF THE 7 OSI LAYERS (From Top to Bottom) 7. Application Layer 6. Presentation Layer 5. Session Layer 4. Transport Layer 3. Network Layer 2. Data Link Layer 1. Physical Layer You can remember them with this simple phrase: “ A ll P eople S ee...

FSMO stands for Flexible Single Master Operations . These roles exist inside Active Directory. Active Directory is a system created by Microsoft that is used in Windows Server environments to manage users, computers, passwords, and security inside organizations. Think of Active Directory as a digital system that keeps track of everything in a company.  It stores: Employee accounts Computer accounts Passwords Security permissions Department groupings If a company has many offices, each office usually has a server called a Domain Controller. A Domain Controller stores a copy of the directory so employees can log in and access resources. Active Directory normally allows multiple Domain Controllers to update information. This is called multi-master replication. It means more than one server can make changes. However, some very important operations cannot be allowed to happen on multiple servers at the same time. If they did, conflicts would...

  In Active Directory, DNS (Domain Name System) is crucial for resolving hostnames to IP addresses, enabling computers to locate domain controllers and other services within the network. Active Directory utilizes DNS to provide name resolution services for clients and domain controllers, ensuring smooth operation and communication within the domain.  How DNS Works with Active Directory:  Name Resolution: DNS translates domain names and hostnames into IP addresses, allowing computers to locate and interact with each other on the network.  Domain Controller Location: Active Directory relies on DNS to discover domain controllers, which are responsible for authentication, replication, and other key services.  Service Discovery: DNS records, specifically SRV (Service) records, are used to locate specific services within the domain, such as printers or other network resources.  Replication: A...