Switch – A switch is a multiport bridge with a buffer and a design that can boost its efficiency (a large number of ports imply less traffic) and performance. A switch is a data link layer device. The switch can perform error checking before forwarding data that makes it very efficient as it does not forward packets that have errors and forward good packets selectively to correct port only. In other words, switch divides collision domain of hosts, but broadcast domain remains same.
Hub – A hub is
basically a multiport repeater. A hub connects multiple wires coming from
different branches, for example, the connector in star topology which connects
different stations. Hubs cannot filter data, so data packets are sent to all
connected devices. In other words, collision domain of all
hosts connected through Hub remains one. Also, they do not have the
intelligence to find out best path for data packets which leads to
inefficiencies and wastage.
Types
of Hub
- Active Hub: - These
are the hubs which have their own power supply and can clean, boost, and
relay the signal along with the network. It serves both as a repeater as
well as wiring centre. These are used to extend the maximum distance
between nodes.
- Passive Hub: - These
are the hubs which collect wiring from nodes and power supply from active
hub. These hubs relay signals onto the network without cleaning and
boosting them and can’t be used to extend the distance between nodes.
- Intelligent Hub: - It work like active hubs and include remote management
capabilities. They also provide flexible data rates to network devices. It
also enables an administrator to monitor the traffic passing through the
hub and to configure each port in the hub.
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