Tech post

 DTP (Dynamic Trunking Protocol) and  VTP (VLAN Trunking Protocol) DTP (Dynamic Trunking Protocol) is a Cisco proprietary protocol used on Layer 2 (data link layer) of the OSI model. Its main function is to automatically negotiate trunk links between Cisco switches. Here's a breakdown of DTP: Purpose: Simplifies switch configuration by automatically establishing trunk links for carrying traffic from multiple VLANs across a single physical connection. Reduces the risk of manual configuration errors that could lead to connectivity issues. How it Works: DTP operates by exchanging messages between directly connected switch ports. These messages determine if the ports should operate in access mode (carrying traffic for a single VLAN) or trunk mode (carrying traffic for multiple VLANs). Different DTP modes can be configured on switch ports, influencing the negotiation process: On: Forces the port into trunk mode. Off: Disables DTP on the port (manual configuration required for tru...

 VLAN Explained A Virtual Local Area Network (VLAN) is a way to segment a physical Local Area Network (LAN) into multiple logical networks. This allows you to create separate broadcast domains on a single switch, which can improve security, network performance, and manageability. Here are some key benefits of using VLANs: Security: VLANs can isolate traffic between different departments or user groups, preventing unauthorized access to sensitive data. Performance: By segmenting traffic, VLANs can reduce congestion on the network, which can improve overall performance. Manageability: VLANs can simplify network management by making it easier to control and troubleshoot network problems. There are a few different ways to configure VLANs, but they typically involve assigning a VLAN ID to switch ports. Devices connected to ports with the same VLAN ID can communicate with each other, but they cannot communicate with devices on other VLANs unless there is a router configured to route t...