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Why are protocols needed

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Reference no: EM131304891

1. What is an internet? What is the Internet?

2. Why are protocols needed?

3. In a LAN with a link-layer switch (Figure 1.8b), Host 1 wants to send a message to Host 3. Since communication is through the link-layer switch, does the switch need to have an address? Explain.

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Reference no: EM131304891

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