By sharing a group of circuits, carriers, channels, or frequencies rather than allocating separate circuits or channels to each client, trunking allows for the simultaneous provision of network access to many clients.
Trunking enables many calls to go through at once, which is essential for many businesses. Even though all business users are connected by the same VoIP trunk, each call can still reach its intended recipient because signals are sent over a single trunking link.
Sometimes, port trunking—also referred to as link aggregation or Ethernet bonding—is the only type of trunking that is meant. This technique combines different Ethernet cables to function as a single logical link, perhaps allowing for the circumvention of some bandwidth restrictions.
VLANs were developed in part to address some issues with switched networks, which took the place of hubs. Compared to hubs, switches provide better control, including higher throughput, fewer collisions, and other benefits. However, the flat topology of these switched networks can lead to some congestion and redundancy problems. VLANs provide a remedy.
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