Computer Networking
What is the main reason the OSI model was created?

So different networks could communicate.
So application developers can change only one layer's protocols at a time.
So Cisco could use the model.
To create a layered model larger than the DoD model.

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Computer Networking
A network administrator views the output from the show ip route command. A network that is advertised by both RIP and IGRP appears in the routing table flagged as an IGRP route. Why is the RIP route to this network not used in the routing table?

The IGRP route has fewer hops.
RIP has a higher metric value for that route.
IGRP has a faster update timer.
IGRP has a lower administrative distance.

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