Due to rapid advances in wireless technology, the Internet becomes more mobile. Not only smart phones become more affordable and ubiquitous, also car manufacturers are looking into leveraging Internet connectivity in order to provide advanced applications on car maintenance - such as monitoring and diagnosis, on road assistance - such as providing route navigation, weather maps and automated toll payments, as well as on passenger entertainment, including various types of Internet applications. In the last several years we have witnessed increasing number of cars connected to the Internet and all indicators suggest that this trend will continue. Recent researches show that it is possible to use 802.11n based network for drive-through Internet services at the speed of mobile clients up to 100 kilometers per hour. The problems we face in usual wired network become much worse in drive-through network as all it"s clients are constantly switching from one access point to another. Specifically problems with packet congestions, bursts of traffic and packet buffering arise. This is why researching transient processes in wireless network became the primary interest of the author.