Virtualization is a powerful tool that helps reduce administrative burdens while boosting cost savings, scalability, and efficiency. Therefore, organizations today look forward to modernizing their organization digitally with the help of virtualization. https://www.infosectrain.com/blog/docker-vs-virtual-machines/

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VIRTUAL
MACHINES
SWIPE LEFT
DOCKER

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Operating System
Hosted on a single
physical server running
a host OS
DOCKER
Have the host OS and
guest OS like Linux or
Windows inside each VM
regardless of the host
OS
VIRTUAL MACHINES
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Size
Compact and often only
a few megabytes in size
DOCKER
Can be many gigabytes
or even terabytes in size
VIRTUAL MACHINES
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Easily portable due to
the lack of a separate
OS and can be launched
right away after being
ported to a different OS
DOCKER
Porting is complicated
as VMs have their own
OS and takes much
longer due to the size of
the virtual computer
VIRTUAL MACHINES
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Portability

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Running multiple
applications over a
single OS kernel
DOCKER
Running applications or
services on different OS
VIRTUAL MACHINES
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Used for

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Boots immediately due
to the OS being
operational
DOCKER
Require more time to run
applications
VIRTUAL MACHINES
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Speed

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Less secure as attackers
can compromise the
entire cluster of
containers
DOCKER
More secure, so
applications requiring
greater security and
privileges run on VMs
VIRTUAL MACHINES
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Security

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Easy to start and
performs well
DOCKER
Start slowly and
performs poorly
VIRTUAL MACHINES
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Performance

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Can be created easily in
seconds
DOCKER
Take a relatively long
time to create
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Duration to create

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Simple to replicate
DOCKER
Challenging to replicate
VIRTUAL MACHINES
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Replicability