What is the IP address, network mask, gateway?

Exchanging data between at least two computers requires a dedicated computer network has to be created. In such a network, the devices communicate using transmission media via appropriate communication protocols. Not only computers and servers can be connected to a computer network these days, but also CCTV equipment, alarms, smart home components or household appliances.

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Twisted-pair cables - categories, shielding, applications

Twisted-pair cables are used to transmit signals in telecommunication systems and computer networks. The most popular twisted-pair cables are composed of four pairs of twisted insulated copper wires. The twisting strongly reduces the influence of external electromagnetic interference and mutual interference between the pairs, called crosstalk. Currently, the cables are mainly used in telephony and Ethernet networks.

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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.

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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.

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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.

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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.

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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.

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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).

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