Understanding the Cisco Three-Layer Hierarchical Model Hierachical network design helps us to make networks more reliable and predictable. Level by level design help to understand networking factions easily like, we can use tools like access lists at specific level and can avoid them from others. Cisco layer model consist of the following three layers. The …
The Need for Wireless Speakers A common complaint against home audio systems has been the cables that interconnect the speakers to the audio receiver, tuner, cd player, or stereo units. As more and more channels are added to modern home audio equipment the problem of connecting the speakers to the audio sources has exacerbated. Running …
TrueCrypt is a free, open source disk encryption software that is available for the Windows XP, Windows Vista, Windows 7, Mac, Linux, and Unix operating systems. TrueCrypt provides users with real time encryption/decryption, parallelization and pipelining to read/write to partitions as fast as non-encrypted partitions, and plausible deniability through hidden volumes and hidden operating systems …
An IDEN, or Integrated Dispatch Enhanced Network, is a radio service provided by some mobile telephones that allows subscribers to talk to nearby subscribers who have similar phones without dialing their individual numbers. IDENs are often provided as a free service on modern mobile phones, such as Nextel, or as a premium service that can …
An iPad is a tablet PC that Apple produced. It allows users to browse the web, check their email, and run applications while traveling or away from a charger. An iPad is similar to a laptop, but is smaller, does not fold, and has touch screen capabilities. iPads range in price, but feature support for …
A Rogue Access Point is a Wi-Fi Access Point which is setup by an attacker for the purpose of sniffing wireless network traffic. 802.11 (Wi-Fi) utilizes SSIDs (Service Set IDentifiers) to authenticate NICs to wireless access points. There is no similar protocol for authenticating wireless access points. It is possible to place a rogue wireless …
If you search using GoodSearch, the company will donate 50% of the revenue they earn from your searches to the charity of your choice. You can choose from over one hundred thousand charitable organizations, including the National Constitution Center, the NRA Civil Rights Defense Fund, and FreedomWorks. Each time you perform a web search using …
An Ethernet or network isolator is a type of galvanic isolator used in copper-based Ethernet systems. It protects devices and users from possible differences in ground potentials of the voltages in two or more different circuits or circuit components. Ethernet isolators depend on electromagnetic induction to bridge a physical isolation gap within Ethernet systems and …
Certificate Authority or Certification Authority (CA) is an entity, which is core to many PKI (Public Key Infrastructure) schemes, whose purpose is to issue digital certificates to use by other parties. It exemplifies a trusted third party. Some certification authorities may charge a fee for their service while some other CAs are free. It is …
When properly cared for, an audio cassette tape can last 30 years or longer. However, many factors can shorten that lifespan considerably. The two most common causes of premature tape death are equipment malfunction (“The cassette player ate my tape!”) and heat (“The radiator melted my tape!”). Cassette Tape Lifetime Factors All cassette tapes were …