Reading Time-approximately: 3 minutesCRC-4 (Cyclic Redundancy Check 4) is a form of cyclic redundancy checking — a method of checking for errors in transmitted data — that is used on E1 trunk lines. By Rahul Awati Through multiplication and division processes, the CRC-4 bits sent in each SMF are compared to each other. If they match, the frame is considered error-free. Bit 1 is used for the
Reading Time-approximately: 5 minutesA session key is an encryption and decryption key that is randomly generated to ensure the security of a communications session between a user and another computer or between two computers. By TechTarget Contributor Session keys are sometimes called symmetric keys because the same key is used for both encryption and decryption. The session key is used for only one session. It is then discarded, and
Reading Time-approximately: 2 minutesCustomer premises equipment (CPE) is telecommunications and information technology equipment kept at the customer’s physical location rather than on the service provider’s premises. By Katie Terrell Hanna Telephone handsets, cable TV set-top boxes and Digital Subscriber Line (DSL) routers are examples of CPEs. Connectivity is established through a carrier’s telecommunication circuit at a demarcation point, or demarc. The demarc point is typically a central office
Reading Time-approximately: 2 minutesLearn what five-nines availability means and discover the steps enterprises should take to make sure network services are fully accessible. By Chuck Moozakis Five-nines availability — or 99.999% — is the percentage of time a network component or service is accessible to a user in a given period, usually defined as a year. The migration from private networks to cloud
Reading Time-approximately: 3 minutesSFP ports enable Gigabit switches to connect to a wide variety of fiber and Ethernet cables in order to extend switching functionality throughout the network. By David Jacobs and Chris Partsenidis Small form-factor pluggable, or SFP, devices are hot-swappable interfaces used primarily in network and storage switches. The SFP ports on a switch and SFP modules enable the switch to
Reading Time-approximately: 3 minutesAmerican Wire Gauge (AWG) is the standard way to denote wire size in North America. In AWG, the larger the number, the smaller the wire diameter and thickness. By Gavin Wright The largest standard size is 0000 AWG, and 40 AWG is the smallest standard size. It may also be called Brown & Sharpe wire gauge or simply the gauge of the wire.
Reading Time-approximately: 5 minutesA nonfungible token (NFT) is a type of cryptographic asset that is unique and used to create and authenticate ownership of digital assets. By Corinne Bernstein These include cartoons, music, film and video clips, JPEGs, postcards, sports trading cards, and virtual real estate or pets. NFTs provide a secure record that is stamped with unique identifying code stored on blockchain. In contrast to
Reading Time-approximately: 7 minutesInformation governance is a holistic approach to managing corporate information by implementing processes, roles, controls and metrics that treat information as a valuable business asset. By Scott Robinson and Ben Cole The goal of a holistic approach to information governance is to make information assets available to those who need it, while streamlining management, reducing storage costs and ensuring compliance.
Reading Time-approximately: 6 minutesErasure coding (EC) is a method of data protection in which data is broken into fragments, expanded and encoded with redundant data pieces and stored across a set of different locations or storage media. By Robert Sheldon If a drive fails or data becomes corrupted, the data can be reconstructed from the segments stored on the other drives. In this way, EC
Reading Time-approximately: 3 minutesAn incident response team is a group of IT professionals in charge of preparing for and reacting to any type of organizational emergency. By Wesley Chai and Sarah Lewis An incident response team is a group of IT professionals in charge of preparing for and reacting to any type of organizational emergency. Responsibilities of an incident response team include developing a
What is COVID-19?
On 31 December 2019, the World Health Organization (WHO) reported a cluster of pneumonia cases in Wuhan City, China. ‘Severe Acute Respiratory Syndrome Coronavirus 2’ (SARS-CoV-2) was confirmed as the causative agent of what we now know as ‘Coronavirus Disease 2019’ (COVID-19). Since then, the virus has spread to more than 100 countries, including South Africa.
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