Hello all. I am trying to understand number 2c of this pdf: http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CDEQFjAA&url=http%3A%2F%2Fwww.nyu.edu%2Fclasses%2Fjcf%2FCSCI-GA.2262-001_fa12%2Fhandouts%2FHomework2Solutions.pdf&ei=DX1sUurmCeOYiQKnwYFg&usg=AFQjCNElBG4mGrEvpyPHCu4HeWcWQYGxSA&sig2=0D9G34-MeX0IDDOVNdZWhQ&bvm=bv.55123115,d.cGE. I have tried solving it on my own but I got the wrong answer. I am starting to get irritated. How I solved the problem: Time for DNS to supply client with IP: RTT1 + ... + RTTn Time for client to have initial handshake: RTT0 Time for client to receive all message: RTT0 Total time = RTT1 + ... + RTTn + RTT0 + RTT0 = RTT1 + ... + RTTn + (2 * RTT0) According to the answer I am missing a RTT0. I have no idea where that extra RTT0 comes from. May someone please help me out?