What is a Layer 2 protocol?

Layer 2 protocols or network L2 protocols are a list of communication protocols used by Layer 2 devices (such as network interface cards (NIC), switches, multiport bridges, etc.) to transfer data in a wide area network, or between one node to another in a local area network.

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What is a layer 2 in blockchain?

Layer-2 refers to a network or technology that operates on top of an underlying blockchain protocol to improve its scalability and efficiency . … For instance, Bitcoin is a Layer-1 network, and the Lightning Network is a Layer-2 solution built to improve transaction speeds in this fashion on the Bitcoin network.

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