Нетворкинг

Intro RJ45 and SFP ports serve different engineering purposes in modern networks rather than competing directly. RJ45 uses copper cabling, supports PoE, and is ideal for short-distance LAN connections up to 100 meters. However, copper PHYs consume more power, introduce higher latency, ...

Intro 2.5G and 5G Multi-Gig Ethernet ports defined by IEEE 802.3bz (NBASE-T) - allow Ethernet speeds of 2.5Gbps and 5Gbps over existing Cat5e/Cat6 cabling, eliminating the need for costly recabling. These ports use advanced PAM16 modulation, sophisticated echo cance...

Intro PC, UPC, and APC describe ferrule endface polish types used in fiber optic connectors. These polishing styles directly affect optical return loss (ORL), insertion loss, compatibility with different optical systems, and overall network stability. PC connectors ...

Intro Media converters and fiber optic modems both connect optical and electrical network domains, but they operate at different layers and serve entirely different purposes. Media converters perform physical-layer (Layer 1) media adaptation between copper and fiber - transparent to pr...

Intro IEC power connectors - especially IEC60320 types such as C13/C14 and C19/C20—form the global standard for powering IT equipment, servers, switches, PDUs, and industrial devices. Understanding IEC standards, current ratings, temperature limits, conductor gauge, connector locking m...

Intro An Optical Distribution Frame (ODF) is the central hub for fiber splicing, termination, patching, and cable protection in modern optical networks. As data centers, enterprises, telecom operators, and smart-building infrastructures deploy increasingly dense fibe...

Power over Ethernet (PoE) delivers power and data through a single Ethernet cable, enabling simplified deployments of IP cameras, Wi-Fi 6/6E/7 access points, VoIP phones, IoT devices, digital signage, and automation endpoints. Modern PoE standards - IEEE 802.3af, 802.3at, and 802.3bt (Type 3 and Type 4) ...

Intro A PCIe (Peripheral Component Interconnect Express) network card is a high-performance adapter that connects servers, workstations, and storage systems to modern 10G/25G/40G/100G/200G/400G Ethernet networks. PCIe NIC performance depends not only on link speed b...

Intro A data center server rack is the physical foundation of modern IT infrastructure, enabling the organized installation of servers, switches, PDUs, UPS systems, and structured cabling. There are three primary rack types - open-frame racks, enclosed cabinets, and wall-mount racks, e...

Intro RJ45 and RJ11 connectors look similar, but they serve completely different technical purposes: RJ45 (8P8C) supports Ethernet data rates from 10/100/1000 Mbps up to 40Gbps with Cat5e to Cat8 cabling, while RJ11 (6P2C/6P4C/6P6C) is used for analog voice and DSL signals in the narro...