In the field of network cabling, twisted pair cables, as the core carrier of data transmission, directly affect the stability and transmission efficiency of networks. CAT5E (Enhanced Category 5 Twisted Pair), as an upgraded standard after CAT5, remains the mainstream choice for small and medium-sized networks, enterprise local area networks (LANs), and home cabling due to its balanced performance and cost advantages. This article will comprehensively analyze the technical characteristics of CAT5E from aspects such as definition, core parameters, structural features, performance advantages, application scenarios, and installation specifications, helping readers gain an in-depth understanding of this classic cabling standard.