Computer Network Fundamental Part 03 ( Final).
ISO Model
3. Network Layer: Network layer tag IP , in upcoming data. Router device are worked this layer. When data come in this layer. This layer rap those date with Source and destination IP. There are two protocol use this layer. One is IP (Internet Protocol), IPX ( Internet Packet Exchanging ).
Network Layer PDU (Protocol Data Unit) is packet.
2. Data-link Layer: In shortly when packet come this layer. Data-link layer again rap. Its called frame. Source and destination MAC ( Media Access Control Address) include in Frame. Switch are used in this layer. Because switch work with MAC address.
1. Physical Layer: Connector, Cable, Hub, Analog or Digital communication media etc are called physical layer.
Thank You
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