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Some Theory

Yagi-Uda antennas - putting the theory into practice - tailor-made designs!
The Yagi-Uda or Yagi antenna is one of the most popular antenna designs. Despite a comparatively simple construction, it has a high gain, typically greater than 10 dBi. Yagi-Uda antennas can operate in the HF to UHF bands (3 MHz to 3 GHz), but often within a limited bandwidth around the center frequency.
Industrial switches - equipment for all conditions!
ULTIPOWER Ethernet industrial switches enable data transmission at rates of 10/100 Mbps or 1000 Mbps. Their RJ45 ports support auto-negotiation and Power over Ethernet (PoE) functions. The devices automatically discover PD devices (///Power Device///) compliant with IEEE 802.3af standard and supply power to them. This way, it is easy to power network devices located in places without access to AC lines, such as access points, IP cameras, IP phones etc. The switches have been equipped with optical converters or SFP slots for installing modules changing the transmission medium to fiber.
PoE - IEE 802.3af and IEE 802.3at
PoE (Power over Ethernet) is the name of a number of methods that allow for powering network devices through UTP/FTP cables. This way it is possible to power devices such as cameras, phones, switches, access points, etc.
What is DDNS (Dynamic Domain Name System)
and how to use it?
Translation of the domain name into the set of numbers is performed by the appropriate DNS server, to which the computer sends a request for the translation of the address. After receiving the response with the numeric address, the computer connects to the relevant computer/server.
Twisted-pair cables - nomenclature, standards, parameters
Twisted-pair cables are used to transmit signals in telecommunication systems and computer networks. Currently they are mainly used in analog telephony and Ethernet networks. Twisted-pair cables may consist of one or more pairs. The twisting strongly reduces the influence of external electromagnetic interference and mutual interference between the pairs, called crosstalk.
Access Point Modes (example device: TP-Link TL-WA500G)
Access Point is the device that connects a wireless network to a wired system, so it has at least two interfaces: wireless - WLAN, using 802.11 standard, and wired - LAN, using 802.3 standard.
Self-help book for WLAN installers/providers
WLAN (Wireless Local Area Network) is a radio technology which allows to build wireless data networks with satisfactory parameters and quite large ranges of operation at a comparatively low cost. Additional advantage of this technology is short time needed for its implementation.
To meet the needs of many people interested in building WLAN networks, we have decided to collect in one article a bit of theory and a lot of practical information on quick and effective implementation of wireless networks working in 2.4 GHz and 5 GHz bands (802.11).
WLAN - the indoor installations
If the network is to work in an office block, the biggest problem to solve is the existence of numerous walls and several floors, and therefore attenuation of signals by walls and ceilings. In the case the network is to be used in the whole building, there will be needed several access points.