Various layers of OSI model equipment

Layer 1:

Media: Passing information as bit bit

Repeater: Can extend the distance between networks

Hub: Used to reorganize network signals, it is not possible to determine the best path is sometimes called a multiport repeater

Compare repeaters and hubs:

The repeaters has only two ports, and the hub typically has 4 to 20 ports.

Repeaters receives information from one port and outputs it on another port. The hub receives information from one port, and every other port can receive it.

Layer 2:

NIC: Carrier MAC address because it also involves signaling and encoding, it is also a layer 1 device.

Bridge: The purpose is to adjust the transmission between the LAN, maintain the MAC address on both sides, according to the MAC address to make the decision.

Switches: Connect hub and bridge together.

Layer 3:

Routers: According to the network address decision transmission, receive packets, determine the best transmission path. 2 main functions: Best path selection, Exchange data on the best port.

Layer1-7:clouds.

Various layers of OSI model equipment