The popularity and usefulness of the Internet seem to grow exponentially every day. As a result of this rapid growth, mobile users expect to access the Internet?s information resources and to communicate with other Internet users. However, providing efficient and reliable stream transmissions in mobile computing environments presents a significant ob* o the development of mobile computing systems over the Internet. this paper presents three approaches-known as Fast Retransmissions, Data Interceptions, and Packet Interceptions-that can be used to improve the performance and reliability of transmission protocols mobile computing environments the paper also discusses how packet interception has become the most effective approach of the three and describes its implementation.