This book constitutes the thoroughly refereed post-proceedings of the International Conference on Information Networking, ICOIN 2006 held in Sendai, Japan in January 2006. The 98 revised full papers presented were carefully selected and improved during two rounds of reviewing and revision from a total of 468 submissions Providing Delay Guarantee in Input Queued Switches: A Comparative Analysis of Scheduling Algorithms / Sayed Vahid Azhari, Nasser Yazdani and Ali Mohammad Zareh Bidoki — Performance Analysis of a VC Merger Capable of Supporting Differentiated Services in an MPLS over ATM Switch / Ahmad Rostami and Seyed Mostafa Safari