The battle between JUNOS and IOS

Despite marketing claims, are Juniper and Cisco's operating systems really that different?
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Cisco's 20+ year leadership position in routing has been challenged by Juniper over the past 10 years. Juniper has swiped about a quarter of Cisco's share of the service provider router market and is also coming after Cisco in the enterprise. Juniper credits its JUNOS operating system strategy for much of its success while criticizing Cisco's IOS software direction as fragmented. Here's a comparison of both OSes.

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