What is a virtual team

Answer the following questions in a research breif
1.What is a virtual team? What are the benefits of a virtual team?
2.As a virtual team leader, what characteristics would you look for in virtual team members?
3.How would you conduct effective virtual team meetings?
4.What technology solutions would you use as part of your team meetings and communication?
5.How would you ensure that all team members contribute to accomplishing the team tasks?