+--------+
               | Router |
               +--------+
                    |
      +-------------+--------------+
      |                            |
 +--------+                   +--------+
 |  VRF1  |                   |  VRF1  |
 |Branch A|                   |Branch B|
 +--------+                   +--------+
      |                            |
 +--------+                   +--------+
 |  VLAN1 |                   |  VLAN1 |
 +--------+                   +--------+



          +-------------------------+
          |      ISP Backbone       |
          +-------------------------+
                   |
          +-------------+--------------+
          |                            |
     +--------+                   +--------+
     |  VRF1  |                   |  VRF1  |
     |Branch A|                   |Branch B|
     +--------+                   +--------+
          |                            |
     +--------+                   +--------+
     |  VLAN1 |                   |  VLAN1 |
     +--------+                   +--------+

VRF (Virtual Routing and Forwarding) is a technology that allows multiple virtual routing tables to coexist within a single physical router. Each VRF instance is associated with a specific set of interfaces and routes, and is completely independent from other VRF instances on the same router.

Here's a table that summarizes the key features of VRF routers:

Feature	Description
Virtual Routing	VRF technology enables the creation of multiple routing tables
Logical Routing	Each VRF instance has a distinct set of interfaces and routes
Network Isolation	VRF instances provide network separation and isolation
Security	VRF instances can be used to enhance network security
Scalability	VRFs allow a single physical router to handle multiple networks
To better understand VRF routers, let's take an example of a scenario where an organization has two departments, Marketing and Sales, and both departments require separate networks with no access to each other's data. In this scenario, the organization can use VRFs to create separate virtual routing tables for each department, as shown in the diagram