ISDN – otherwise known as integrated services digital network – is a digital phone connection that can transmit data, voice and video over a normal telephone line. It was meant to be a method of transmitting information much faster than a typical analog phone; however, the phone industry was able to survive the arrival of …
802.11g is one of the standards used for high speed wireless networks, commonly known as Wifi. This standard was created by the IEEE (Institute of Electrical and Electronics Engineers) in June of 2003 and uses a 2.4 to 2.5 gigahertz radio frequency to send and receive data from one device to another. There are several …
A routing table is a grouping of information stored on a networked computer or network router that includes a list of routes to various network destinations. The data is normally stored in a database table and in more advanced configurations includes performance metrics associated with the routes stored in the table. Additional information stored in …
The OSI Model was created based on recommendations from the International Organization for Standardization (ISO) in 1980, which started expanding on the DoD model in the late 1970s. The current standard was published in 1996. The official title for the model is the ISO OSI (Open Systems Interconnection) Reference Model since it describes or relates …
Description of ADSL A special Internet service which is available in many areas is called the Asymmetrical Digital Subscriber Line (ADSL). ADSL connections use existing copper telephone lines to transmit data to and from the ISP. These connections may be limited by proximity to the ISP or the telephone company because the data will lose strength through …
Intersymbol interference is a signal distortion in telecommunication. One or more symbols can interfere with other symbols causing noise or a less reliable signal. The main causes of intersymbol interference are multipath propagation or non-linear frequency in channels. This has the effect of a blur or mixture of symbols, which can reduce signal clarity. If …
An IP (or Internet Protocol) address conflict occurs when two different systems on the same subnet are assigned or otherwise have their network interface configured to use the same IP address. It is possible to have two systems on different subnets configured with the same IP address, but not have a conflict occur due to …
ARP (Address Resolution Protocol) Cache is a technique used to store “mappings” of OSI Model Network Layer addresses (IP addresses) to corresponding OSI Model Data Link addresses (MAC addresses). Due to a variety of possible circumstances, ARP cache can become damaged requiring the end user or administrator to determine how to clear the ARP cache …
While surfing the Internet, if an end-user encounters a 502 proxy error, he or she will not be able to view the desired web page. The error message is commonly encountered when accessing websites through a proxy server. The problem is typically caused for one of two reasons: 1 – The Internet Security and Acceleration …
Over the past decade, wireless network use has grown from just something done in computer science departments at universities to something done in the home, restaurants, and just about anywhere. SSID (Service Set Identifier) is the term that describes the wireless network name. It distinguishes between networks that may be in range of a device …