The 20th IEEE LANMAN Workshop continues the LANMAN tradition as a leading forum for showcasing the latest technological advances in local and metropolitan networking. LANMAN 2014 will be held on May 21-23, 2014 at the University of Nevada, Reno campus in Reno, Nevada. The LANMAN workshop seeks both theoretical and experimental contributions. Single-track presentations are planned to stimulate technical exchange among researchers and practitioners with a broad interest in networking. We expect the workshop to be a forum for discussion of new and interdisciplinary ideas on new architectures, paradigms, concepts, and economic and service models; novel and speculative ideas are particularly encouraged. We also encourage studies based on measurements from real-life networks and testbeds. The technical interactions at the workshop will be enriched by social activities and sightseeing possibilities in the Reno-Tahoe area.