This is true because it serves them better - doing this they can save money in the long run and also gain a good standing in the eyes of their customers. But most importantly, through theiy, they're effectively helping the environment.
The network layer is responsible for routing<span>, which is moving </span>packets<span> (the fundamental unit of data transport on modern computer networks) across the network using the most appropriate paths. It also addresses messages and translates </span>logical addresses<span> (i.e., IP addresses) into </span>physical addresses<span> (i.e., </span>MAC addresses). This contrasts with the data link layer below it, which is responsible for the device-to-device delivery of packets using MAC addresses. Above the network layer is the transport layer, which is responsible for making certain that packets are delivered in sequence and without errors, loss or duplication.<span>
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Answer:
hope this helps :) the answer is in the pic
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