|
|
|
| Common themes: |
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| Asymmetry |
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|
|
|
|
|
|
|
|
| • | forward
and reverse paths are asymmetric |
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| • | intermediary
hops each have different reverse paths |
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| (particularly
influential on intermediary RTTs) |
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| • | hot-potato
(shortest-exit) routing |
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| • | routing
policy is prefix-based |
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| • | passive
taps may only see one direction (prefix-based) |
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| 6 |