It is beyond the scope of this chapter to cover network troubleshooting scenarios in depth, but it may prove enlightening to make mention of problems that are likely to occur if you are a network administrator, and what the cause might be. Most of these problems have multiple potential causes, so you will likely have to gather some information before you can make conjectures about the root cause.
User cannot connect to a website
This is probably the most common end user problem, if not the most common one: a user reports that they cannot access a particular website, and they are consistently getting the same error message. Without knowing more information about the problem, you cannot tell which of many causes may be operative: ...