the devices which connects different computer systems through a single physical conections.
Modern networks used two devices for the data packets within the network will flow easily. The two devices are the routers and switches.
Switches / Bridges and hubs work at data link layer, but there are layer three switches which operate at network layer. Dhruv
bridges, Switches and NIC..
In 1945, data was entered into computers via a series of switches.[1]
Altairs
Mechanical switches
mechanical switches
CISCO is widely known for its networking hardware products such as routers, modems, and switches. Some of CISCO's other hardware products are blade server switches, data center switches, and optical networking hardware.
nic work on data link layer which is layer 2
Not really - they operate at the Data Link layer using the MAC address and therefore don't really segment a network. There are some managed switches that can do this or by using VLAN configurations, but ordinary switches will not really segment a LAN.
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A repeater amplifies a signal. It will also re-send the signal as a "clean" signal. A hub is a multiport repeater. It will send a signal it receives out, through all of its ports - except the port where it received the signal. Bridges and switches are more intelligent, in that they send data only to the destination - according to the MAC address. Bridges and switches are similar, but switches have more hardware optimization, allowing for fast switching of large volumes of data.