Q4: (A) State if each of the following statements is true or false. Give explanations for incorrect answers. 1. Ethernet defines a 32-bit physical address, called a MAC address. 2. Class C networks...

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Extracted text: Q4: (A) State if each of the following statements is true or false. Give explanations for incorrect answers. 1. Ethernet defines a 32-bit physical address, called a MAC address. 2. Class C networks provide 8 bits for the network field. 3. The receive window field in TCP segment is used for implementing a reliable data transfer service. 4. In star topology Failure of one computer disturbs the whole network. 5. The data link layer is responsible for node to node delivery. 6. The primary transport layer networking devices are bridges and switches. 7. Logical and port addresses change from source to destination.