Troubleshoot TCP/IP Model

 How can troubleshoot TCP/IP Model 

1. Physical Layer 

    Electrical Signaling

    Hubs

    Repeaters

    Radio Waves

    Twisted Pair Cable

2. Data Link Layer

    Ethernet

    Network Interface Cards 

    Frames

    MAC Address

    Network Switching

3. Network Layer 

    IP Address

    Rackets

    Routing

4. Transport Layer

    TCP

    UDP

    Port Number