In what ways is e-mall different from other forms of business communications?
can't see body language
can't save messages
can't keep written records
can't hear tone of voice

Solution: the categorization of functional and non-functional requirement are as follows: some of the more typical functional requirements include: • business rules• transaction corrections, adjustments and cancellations• administrative functions• authentication• authorization levels• audit tracking• external interfaces• certification requirements• reporting requirements• historical data• legal or regulatory requirementswhile,some typical non-functional requirements are: • performance – for example response time, throughput, utilization, static volumetric• scalability• capacity• availability• reliability• recoverability• maintainability• serviceability• security• regulatory• manageability• environmental• data integrity• usability• interoperability

That is called a  (wimax)           because it  uses wireless transmissions for data communications as much as 35 miles apart.

Answer by checking for voltage with a neon tester;