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Once you understand the role your server plays within your organization, you can 
plan for its implementation. Is the system mission critical? How would it affect 
your organization if for some reason this server malfunctioned? Depending on the 
answer to this question, you may only need to set up a single server for this task, or 
you may wish to plan for redundancy such that the server doesn't become a central 
point of failure. An example of this may be a 
DNS server
, which would affect your 
colleagues' ability to resolve local hostnames and access required resources. It may 
make sense to add a second DNS server to take over in the event that the primary 
server becomes unavailable for some reason.
Another item to consider is how confidential the data residing on a server is going 
to be for your environment. This directly relates to the installation procedure 
we're about to perform, because you will be asked whether or not you'd like to 
utilize 
encryption
. The encryption that Ubuntu Server offers during installation 
is known as