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: 7 minutesNetwork bandwidth is a measurement indicating the maximum capacity of a wired or wireless communications link to transmit data over a network connection in a given amount of time. By Andrew Froehlich and Kevin Ferguson Typically, bandwidth is represented in the number of bits, kilobits, megabits or gigabits that can be transmitted in 1 second. Synonymous with capacity, bandwidth describes data
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: 6 minutesIn 2020, the pandemic threw the best-laid IT plans into chaos. As enterprises find their footing again, here are four network trends defining the second half of 2021. By Alissa Irei The COVID-19 crisis supercharged several major 2021 networking trends that appear poised to outlast the pandemic itself. As enterprises inch cautiously toward normalcy, organizations are pushing ahead with 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: 6 minutesDifferent types of networking cables are the backbone of a network’s infrastructure. Selecting the right type is critical, as enterprise network admins deploy new technologies. By Chris Partsenidis The types of network cables employed in any network infrastructure is one of the most important aspects of networking, and it has become increasingly critical with the introduction of newer technologies, such
Reading Time-approximately: 7 minutesCloud users must select a cloud abstraction layer that meets their business requirements. Consider factors such as level of control and security when choosing SaaS, PaaS or IaaS. By Stephen J. Bigelow Public clouds provide an array of services and capabilities intended to support computing as a utility. But not all cloud services are the same. Cloud users can implement
Reading Time-approximately: 3 minutesNew security integrations with Microsoft Azure Sentinel, Splunk, Datadog and Sumo Logic will supposedly make it easier for users to analyse network security data. By Alex Scroxton Internet infrastructure giant Cloudflare has announced a series of integrations to help users of various platforms connect and analyse key insights from across their networks. Manchester United praised for swift response to cyber attack The
Reading Time-approximately: 4 minutesOrganizations have used disaster recovery tiers to define the DR process for years. These key tiers can serve as a backbone to a comprehensive disaster recovery plan. By Paul Kirvan Disaster recovery focuses on the protection and restoration of IT system functions and network services, and it dates back to the 1970s. Its roots are in mainframe computing systems, and
Reading Time-approximately: 6 minutesCreating backups in virtual environments has its own challenges. Avoid some of the typical errors involving snapshots, quiescing and scheduling, and generate solid VM backups. By Eric Siebert In order to achieve the most efficient virtual machine backups possible, always make sure your backup application takes advantage of the many benefits provided by the virtualization architecture. The process of backing up
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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