The passage discusses the challenges and solutions in extending Ethernet signals using repeaters. It highlights the increased cost and reliability issues with transceivers due to higher power and sensitivity requirements. The text also explains the end-to-end sequence for ensuring file transmission accuracy, including the use of end packets to confirm successful data transfer. Additionally, it describes the EFTP (Ethernet File Transfer Protocol) for stable file downloads, noting its behavior, stability, and limitations, such as lack of control and acknowledgment mechanisms. The passage concludes with a list of references to academic papers on packet-switching environments.The passage discusses the challenges and solutions in extending Ethernet signals using repeaters. It highlights the increased cost and reliability issues with transceivers due to higher power and sensitivity requirements. The text also explains the end-to-end sequence for ensuring file transmission accuracy, including the use of end packets to confirm successful data transfer. Additionally, it describes the EFTP (Ethernet File Transfer Protocol) for stable file downloads, noting its behavior, stability, and limitations, such as lack of control and acknowledgment mechanisms. The passage concludes with a list of references to academic papers on packet-switching environments.