In this section of the course,
we're going to discuss disaster recovery.
Disaster recovery is a strategic security planning model
that enables an organization to recover access
to their software, data, or hardware
that are needed to resume the performance
of their critical business functions
after a natural or human-induced disaster.
The disaster recovery process involves a set of policies,
tools, and procedures to enable the recovery
or continuation of vital technology infrastructure
and systems following a given disaster.
Now, our goal in disaster recovery
is to minimize our downtime and our data loss
while maximizing the speed of our recovery
back to normal operations so we can best mitigate
any impacts to our business operations.
So in this section, we're going to be focused solely
on Domain 3, network operations, and Objective 3.3.
Objective 3.3 states that you must be able
to explain disaster recovery, or DR concepts.
First, we're going to look at some different
high-availability approaches.
Now, high availability refers to the fact
that we want our systems and processes
to meet an agreed-upon level of operational performance
by making sure we have a high level of uptime.
Then, we're going to discuss methods that we can use
to design redundant networks.
Designing redundant networks involves implementing
duplicate components, paths, and computing power
to ensure continuous service in the case
of a single system failing on us.
Next, we're going to learn about some common
disaster recovery metrics,
like the mean time between failures,
the mean time to repair, the recovery point objective,
and the recovery time objective.
After that, we're going to explore
some redundant site considerations
so you can decide if your organization
should use a cold site, a warm site,
or a hot site in their disaster recovery planning.
Then, we're going to cover the different types
of training and exercises that you can use
within your disaster recovery plans,
including tabletop exercises and validation tests.
Finally, we're going to take a short quiz to see
what you learned during this section of the course
and review your answers to ensure you know
why the right answers are right
and why the wrong answers are wrong.
So if you're ready, let's get started with our coverage
of disaster recovery in this section of the course.