Compare SONiC Installation, Upgrade, and Downgrade Methods SONIC-DEPLOY Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   Which statement correctly differentiates an upgrade from a downgrade in SONiC?

   • AAn upgrade is performed via USB, while a downgrade is performed via network
   • BAn upgrade preserves configuration, while a downgrade erases it
   • CAn upgrade requires a reboot, while a downgrade does not
   • DAn upgrade moves to a newer version, while a downgrade moves to an older version
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   A network administrator wants to upgrade SONiC on a switch to a newer release. Which method involves installing a complete new SONiC image and then rebooting the switch to run the new image?

   • APackage-based upgrade using apt-get update and apt-get upgrade
   • BImage-based upgrade using the 'sonic-installer' command
   • CConfiguration replacement using the 'config reload' command
   • DFirmware update using the switch's BIOS utility
   Reveal Solution Discussion Select an answer first
4. 8expert · hard

   A switch was upgraded to SONiC 202111, but the new version has a bug that causes intermittent packet loss. The administrator needs to downgrade to 202012. The switch has the 202012 image installed. The configuration was not modified after the upgrade. What is the best approach to minimize downtime?

   • ARestore the configuration from a backup, then reboot into the 202012 image.
   • BReboot the switch and select the 202012 image from the boot menu.
   • CTry to fix the bug in 202111 by applying a patch.
   • DPerform a fresh installation of 202012 and reconfigure from scratch.
   Reveal Solution Discussion Select an answer first
5. 9application · medium

   A network engineer is setting up a single switch in a lab and needs to install SONiC. The switch is ONIE-compatible, but the lab has no network connectivity to a DHCP server or TFTP server. The engineer has the SONiC image file on a laptop. What is the most practical installation method?

   • ACreate a bootable USB drive with the SONiC image and install it via ONIE's USB installation mode.
   • BSet up a local web server on the laptop and use ONIE's network installation.
   • CUse the switch's management interface to upload the image via SCP.
   • DConnect the laptop to the switch's console port and use a terminal emulator to transfer the image.
   Reveal Solution Discussion Select an answer first
6. 10application · medium

   A company has a SONiC switch that is running a version with a known bug. The vendor has released a new image that fixes the bug. The switch is in a remote location with limited bandwidth. The administrator wants to minimize the amount of data transferred and avoid a full image download if possible. What should the administrator consider?

   • AApply a configuration change to work around the bug instead of upgrading.
   • BUse ONIE to reinstall the entire system with the new image.
   • CUse a package-based upgrade to apply only the fix, if available as a package.
   • DDownload the full image and use the sonic-installer to upgrade.
   Reveal Solution Discussion Select an answer first