What is Collision Broadcast Domain?
A collision broadcast domain is a network segment in which all devices can hear all other devices’ traffic. This results in collisions occurring between packets, which reduces the efficiency of the network. To avoid this problem, devices in a collision broadcast domain are typically separated into multiple collision domains, each of which has its own dedicated bandwidth.
How to Identify Collision Broadcast Domain?
Collision domains can be created using switches, which separate the traffic of each device onto its own dedicated connection. However, if there is only one switch in the network, all devices are still in the same collision domain.
Switches can also be used to create multiple collision domains within a single network by dividing the switch into multiple virtual switches. Each virtual switch has its own set of ports, which are not shared with any other virtual switch. This effectively separates the collision domains of each virtual switch.
Routers can also be used to create multiple collision domains. Routers work by forwarding packets from one network to another. This means that each router has its own dedicated connection to each network. This effectively separates the collision domains of each router.
Collision domains can also be created using VLANs. A VLAN is a virtual LAN that is created by tagging packets with a VLAN ID. This ID identifies the VLAN to which the packet belongs. Devices that are configured to be in the same VLAN will receive all of the traffic that is sent to that VLAN. This effectively separates the collision domains of each VLAN.
Collision domains can also be created using Bridges. Bridges work by forwarding packets from one network to another. This means that each bridge has its own dedicated connection to each network. This effectively separates the collision domains of each bridge.
Difference Between Collision Domain and Broadcast Domain
Broadcast domains are created by devices that forward broadcasts. This includes switches, routers, and bridges. Broadcast domains can also be created by VLANs.
Collision domains are created by devices that generate collisions. This includes hubs and repeaters. Collision domains can also be created by Ethernet networks that use the half-duplex mode of operation.
The main difference between the collision domain and the broadcast domain is that the collision domain is a network segment in which all devices can hear all other devices’ traffic while the broadcast domain is a network segment in which all devices can hear all broadcasts.
Broadcast domains are typically larger than collision domains. This is because switches, routers, and bridges forward broadcast to all devices in the broadcast domain while hubs and repeaters only forward traffic to the devices in the same collision domain.
The number of collision domains in a network can be increased by adding more switches, routers, VLANs, or bridges. The number of collision domains can also be decreased by removing switches, routers, VLANs, or bridges.
How Collision Broadcast Domain Calculate?
The number of collision broadcast domains in a network is calculated by the formula:
Number of Collision Broadcast Domains = Number of Switches + Number of Routers + Number of VLANs + Number of Bridges
For example, if a network has two switches, three routers, four VLANs, and five bridges, the number of collision broadcast domains would be:
Number of Collision Broadcast Domains = 2 + 3 + 4 + 5
Number of Collision Broadcast Domains = 14