What is the difference between broadcast domain and collision domain?

The difference between broadcast domain and collision domain: 1. Broadcast domain refers to all nodes that receive broadcast information, and conflict domain refers to nodes in the same physical segment; 2. Broadcast domain uses data link layer protocol , the conflict domain adopts the physical layer protocol; 3. The broadcast domain can cross network segments, and the conflict domain occurs in the same network segment.

Collision Domain (Physical Segmentation):

The collection of all workstations connected on the same wire, or It is said to be the set of all nodes on the same physical network segment or the set of nodes on the Ethernet competing for the same bandwidth. This domain represents the area in which conflicts occur and propagate, and this area can be considered a shared segment. In the OSI model, the collision domain is regarded as the first layer concept. The devices connected to the same collision domain include Hub, Repeater or other devices that simply copy signals. In other words, all nodes connected by Hub or Repeater can be considered to be in the same conflict domain, and it will not divide conflict domains. The second-layer devices (bridges, switches) and the third-layer devices (routers) can all divide conflict domains, and of course can also connect different conflict domains. Simply put, the Repeater can be regarded as a cable, and the network bridge can be regarded as a bundle of cables.

Broadcast domain:

A collection of nodes that receive the same broadcast message. For example, if any node in the set transmits a broadcast frame, all other nodes that can receive the frame are considered part of the broadcast frame. Since many devices are prone to broadcasting, if not maintained, a large amount of bandwidth will be consumed and the efficiency of the network will be reduced. Since the broadcast domain is considered a second-layer concept in OSI, nodes connected to first- and second-layer devices such as hubs and switches are considered to be in the same broadcast domain. Routers and Layer 3 switches can divide broadcast domains, that is, they can connect different broadcast domains.

The main differences between broadcast domain and conflict domain are:

1. Different concepts: broadcast domain refers to all nodes that receive broadcast information, and conflict domain refers to Nodes in the same physical segment.

2. Different protocols: the broadcast domain uses the data link layer protocol, and the collision domain uses the physical layer protocol.

3. Different network segments: Broadcast domains can cross network segments, and conflict domains occur in the same network segment.

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