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@@ -1,7 +1,7 @@
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<p>Computers are usually not connected directly, but are accessible through a series of <strong>routers</strong>.
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<p>Computers are usually not connected directly, but are accessible through a series of <strong>routers</strong>.
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A router operates much like a postal office. When it receives a <strong>packet</strong>, it looks at the destination
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A router operates much like a postal office. When it receives a <strong>packet</strong>, it looks at the destination
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-and determines which route to send it on. Switches usually choose the route that is closest to the destination
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+and determines which route to send it on. They usually choose the route that is closest to the destination
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computer. They keep track of all their routes in a <strong>routing table</strong>.
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computer. They keep track of all their routes in a <strong>routing table</strong>.
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<p>Pause the simulation and look at one of the packets. It contains only the srcip and dstip headers we saw in the
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<p>Pause the simulation and look at one of the packets. It contains only the srcip and dstip headers we saw in the
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earlier levels. There is no extra information to tell the routers how to send the packet. Instead, this information
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earlier levels. There is no extra information to tell the routers how to send the packet. Instead, this information
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