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WLAN, LAN

Trochu teorie

Číslo
Název
Datum
1
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.
2020-05-11
2
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.
2016-09-15
3
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.
2015-08-24
4
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.
2014-08-20
5
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 query asking for the translation of the address. After receiving the response with the numeric address, the computer connects to the appropriate computer/server.
2009-04-11
6
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.
2018-05-15
7
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.
2014-04-07
8
Režimy Access pointu (vzorové zařízení: TP-Link TL-WA501G)
Access Point je zařízení, které propojuje bezdrátovou síť a pevně zapojený systém. Tudíž musí mít alespoň dvě rozhraní: bezdrátové - WLAN - používající 802.11 standard a pevně zapojené - LAN - používající 802.3 standard.
2008-10-30
9
Svépomocný průvodce pro WLAN instalátory/poskytovatele
WLAN (Wireless Local Area Network) představuje technologii, která umožňuje výstavbu bezdrátových datových sítí s vyhovujícími parametry a poměrně velkým rozsahem aplikací při relativně nízkých nákladech. Další výhodou této technologie je krátká doba potřebná pro její implementaci.
2007-11-07
10
WLAN - vnitřní instalace
Pokud má síť pracovat v administrativní budově, největším problémem je přítomnost mnoha stěn a několika pater, a tudíž zeslabení signálu procházejícího těmito zdmi a stropy. V případě, že má být tato síť používána v celé budově, bude potřeba několik access pointů.
2007-01-01