Abstract: The present invention provides a method, system, and computer program product for estimating the bandwidth delay product at a single node of a network by calculating the delay of a data packet transmission at that node, also determining observed bandwidth at that node, and then multiplying the delay by the observed bandwidth from this single node.

Abstract: Techniques are provided for avoiding a network address collision when a computer tries to access a target network while being connected to an originating network. To this end, a computer requests a network address for operating in the target network. Upon receiving the requested network address, it is determined whether a conflict exists between the network address for operating in the originating network and the requested network address. If a conflict occurs, a different network address is determined which is different from the requested network address. Upon receipt of the different network address, the computer utilizes the different network address to access the target network, avoiding conflict with the network address for operating in the originating network.

Abstract: The invention relates to a protective bicycling helmet with a retention system having a rear support member for providing a more comfortable and secure fit on a user's head for greater protection and safety. One embodiment of the helmet has a rear stabilizer mounted at its first end to the rear portion of a helmet body. The other elements of the helmet retention system engage the front portion of the helmet body and engage the second end of the rear stabilizer. The rear stabilizer is shaped to conform to the back of the user's head and extends down from the helmet body such that the helmet retention system engages the nape of the neck of the user.