a)An employee working at home complains that some of her messages to fellow employees at the firms' headquarters sites are not getting through. What might be the problem?

There must be an attack like man in the middle that the message is being spoofed and not being sent to the destination end. or the headquarters server Is flooded with lots of messages/requests already.

b)A Company warned by its credit card companies that it will be classified as a high risk firm unless it reduces the number of fraudulent purchases made by its E commerce clients. Come up with a plan to avoid this outcome.