Networking - Networking Basics - Discussion

Trunk - Switch to switch trunk mode Used.

Access - Switch to PC Access mode Used.

I can't understand it. Please anyone help me to get it.

In trunking a separate logical connection is created for each VLAN instead of a single physical connection. In tagging switch adds the source port's VLAN identifier to the frame so that other end device can understands what VLAN originated this frame. Based on this information destination switch can make intelligent forwarding decisions on not just the destination MAC address, but also the source VLAN identifier.

Since original Ethernet frame is modified to add information, standard NICs will not understand this information and will typically drop the frame. Therefore, we need to ensure that when we set up a trunk connection on a switch's port, the device at the other end also supports the same trunking protocol and has it configured. If the device at the other end doesn' t understand these modified frames it will drop them. The modification of these frames, commonly called tagging. Tagging is done in hardware by application-specific integrated circuits (ASICs).

Switch supports two types of Ethernet trunking methods:.

ISL [ Inter Switch Link, Cisco's proprietary protocol for Ethernet].

Trunk port means : we can send and receive multiple vlan information.

Access port means : we send and receive only one vlan information.

Please explain the trunck and access.

Please explain the difference between trunking and switching.

VLAN is referred to as a group of devices connected on same or different LAN segments and can communicate with each other easily like they are connected to the same LAN.

VLAN is chiefly based on Logical connections instead of Physical connections and are very flexible.

VLAN is defined as a collection of network devices existing same broadcast domain.

Definition of VLAN?

Virtual Local Area Network.