In dictionaries:
Cisco IOS XE
IOS XE is a release train of Cisco Systems' widely deployed Internetworking Operating System, introduced with the ASR 1000 series.
Cisco IOS XR
IOS XR is a release train of Cisco Systems' widely deployed Internetwork Operating System, used on their high-end Network Convergence System and carrier-grade routers such as the ASR 9000 series and Carrier Routing System series of routers.
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