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Exploring MikroTik Router Proxy Filtering Methods And Policies

Have you ever wondered how your electronic devices are able to connect to the internet without constantly having to manually enter an IP address? It might seem like magic, but it's actually a technology called Dynamic Host Configuration Protocol, or DHCP for short. In this post, we'll explore the different IP address allocation methods used by DHCP servers, and how they help facilitate internet connectivity for thousands of devices.

Mikrotik Lecture 15:DHCP IP Address Allocation Methods or DHCP Server

The Basics of DHCP

Before we dive into the different IP address allocation methods, it's important to first understand the basics of how DHCP works. At a high level, DHCP is a client-server protocol used to automatically assign IP addresses and other network configuration parameters to devices on a network.

Here's how it typically works:

  • A device joins a network and sends out a broadcast message, asking for a DHCP server to assign it an IP address.
  • The DHCP server receives the request, and responds with an offer to assign the device a specific IP address.
  • The device then responds to the DHCP server, accepting the offer and requesting the assigned IP address.
  • The DHCP server acknowledges the request and assigns the IP address to the device, along with any other network configuration parameters (such as DNS server addresses and default gateway).

This entire process happens automatically, without the device user ever having to manually enter an IP address. And, when a device disconnects from the network, its assigned IP address is released and can be used for another device.

The Different IP Address Allocation Methods

Now that you understand the basics of DHCP, let's explore the different methods used for IP address allocation. There are three main methods:

  1. Automatic allocation
  2. Dynamic allocation
  3. Manual allocation

Automatic Allocation

With automatic allocation, a DHCP server assigns a permanent IP address to each device on the network, based on its MAC address. This means that each device will always be assigned the same IP address, regardless of whether it disconnects and reconnects to the network. This method is typically used for devices that require a fixed IP address, such as servers or printers.

Dynamic Allocation

Dynamic allocation is the most commonly used method for IP address allocation, and it's the one you're most likely to encounter on your home or work network. With dynamic allocation, the DHCP server assigns temporary IP addresses to devices as they join the network, and then releases them when the device disconnects.

When a device joins the network, it's assigned an IP address from a pool of available addresses. When it disconnects, its assigned IP address is released back into the pool, and can be used for another device. This allows for efficient use of IP addresses, as they're only assigned to devices when they're actually on the network.

Manual Allocation

Manual allocation is the least commonly used method for IP address allocation, as it requires network administrators to manually assign a specific IP address to each device on the network. This method is typically used for devices that have specific network configuration requirements, or require a fixed IP address that won't change over time.

Conclusion

Dynamic Host Configuration Protocol (DHCP) is an essential technology for facilitating network connectivity for thousands of devices. By automatically assigning IP addresses and other network configuration parameters, DHCP makes it easy for devices to connect to a network without user intervention. And, with different IP address allocation methods available, network administrators can choose the method that best suits their organization's needs.

Now that you understand how DHCP works and the different IP address allocation methods, you'll be better equipped to troubleshoot network connectivity issues, and make informed decisions when it comes to network configuration. Happy networking!

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