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Upgrade and Downgrade Overview

Typically, you upgrade your device software by downloading a software image to your device from another system on your local network. Using the J-Web interface or the CLI to upgrade, the device downloads the software image, decompresses the image, and installs the decompressed software. Finally, you reboot the device, at which time it boots from the upgraded software.

JUNOS software is delivered in signed packages that contain digital signatures to ensure official Juniper Networks software. For more information about signed software packages, see the JUNOS Software Installation and Upgrade Guide.

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