This paper investigates the impact of mobility-induced link failures on TCP performance in mobile ad hoc networks (MANETs). Through simulations using the ns network simulator, the authors demonstrate that TCP throughput significantly drops when nodes move due to TCP's inability to distinguish between link failures and congestion. They introduce a new metric, "expected throughput," to compare throughput in multi-hop networks and show how explicit link failure notification (ELFN) techniques can improve TCP performance. The study also explores specific examples, such as zero throughput for certain connections, and discusses the effects of different mobility patterns on TCP performance. The authors conclude by highlighting the need for more effective cache management strategies and further research into the interactions between TCP and lower-layer protocols in MANETs.This paper investigates the impact of mobility-induced link failures on TCP performance in mobile ad hoc networks (MANETs). Through simulations using the ns network simulator, the authors demonstrate that TCP throughput significantly drops when nodes move due to TCP's inability to distinguish between link failures and congestion. They introduce a new metric, "expected throughput," to compare throughput in multi-hop networks and show how explicit link failure notification (ELFN) techniques can improve TCP performance. The study also explores specific examples, such as zero throughput for certain connections, and discusses the effects of different mobility patterns on TCP performance. The authors conclude by highlighting the need for more effective cache management strategies and further research into the interactions between TCP and lower-layer protocols in MANETs.