the four main layers of the rain forest is the emergent layer, the canopy layer, the understorey and the forest floor
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transport layer
Layer 4 (Transport) is responsible for correction.
Session Layer - layer 5Transport Layer - layer 4
TCP and UDP are transport layer protocols; the OSI layer is layer 4 (transport)
Layer 4 : The Transport Layer
Application Layer
Transport (Layer 4)
UDP is a layer 4 (transport) protocol.
Datagrams TCP/IP layer 4 PDU's are called segments...
A firewall generally works at layer 3 and 4 of the OSI model. Layer 3 is the Network Layer where IP works and Layer 4 is the Transport Layer, where TCP and UDP function. Many firewalls today have advanced up the OSI layers and can even understand Layer 7 - the Application Layer.
layer 4 - transport layer
There are 4 different layers that the Earth is composed of. The layer that has the melted material is the core layer. The core layer is also the hottest layer.