Yonas Tibebu

  RAID 10, also known as RAID 1+0, is a RAID configuration that combines disk mirroring and disk striping to protect data. It requires a minimum of four disks and stripes of data across mirrored pairs. As long as one disk in each mirrored pair is functional, data can be retrieved. If two disks in the same mirrored pair fail, all data will be lost because there is no parity in the striped sets. RAID, which stands for redundant array of independent disks, comes in several different configurations. A RAID 1 configuration copies data from one drive to another, mirroring and duplicating data to provide improved fault tolerance and data protection. Data is fully protected as the mirror copy is available if the originating drive is disabled or unavailable. Because it makes a full duplicate of the data, RAID 1 requires twice as much storage capacity as the original data. RAID 0 doesn't provide any data protection; its sole purpose is ...

Disaster recovery as a service (DRaaS) is the replication and hosting of physical or virtual servers by a third party to provide failover in the event of a natural catastrophe, power outage or another type of business disruption.  Typically, DRaaS requirements and expectations are documented in a service-level agreement (SLA) and the third-party vendor provides failover to a cloud computing environment, either through a contract or on a pay-per-use basis. In the event of an actual disaster, an off-site vendor is less likely than the enterprise itself to suffer the direct and immediate effects, which enables the provider to implement the disaster recovery (DR) plan even in the event of the worst-case scenario: a total or near-total shutdown of the affected enterprise. DRaaS offers an off-site DR capability that lets customers avoid the cost of maintaining secondary data centers. The approach has opened DR to organizations that wouldn't have been able to affor...

  Hybrid IT is an approach to enterprise computing in which an organization provides and manages some information technology (IT) resources in-house but uses cloud-based services for others. A hybrid approach allows an enterprise to maintain a centralized approach to IT governance while exploiting the benefits of cloud computing. Hybrid IT vs. hybrid cloud The term hybrid IT is often used interchangeably with the term hybrid cloud.  Hybrid cloud, however, can also refer to a cloud architecture in which a vendor who has a private cloud forms a partnership with a public cloud provider -- or a public cloud provider who forms a partnership with a vendor that provides private cloud platforms. So, while hybrid IT is a form of hybrid cloud, not all hybrid clouds are considered hybrid IT. The benefits of hybrid IT There are three forces driving the adoption of hybrid IT: an enterprise's need to maintain control of data for security purp...

  An intrusion detection system (IDS) is a system that monitors network traffic for suspicious activity and alerts when such activity is discovered. While anomaly detection and reporting are the primary functions of an IDS, some intrusion detection systems are capable of taking actions when malicious activity or anomalous traffic is detected, including blocking traffic sent from suspicious Internet Protocol (IP) addresses. An IDS can be contrasted with an intrusion prevention system (IPS), which monitors network packets for potentially damaging network traffic, like an IDS, but has the primary goal of preventing threats once detected, as opposed to primarily detecting and recording threats. How do intrusion detection systems work? Intrusion detection systems are used to detect anomalies with the aim of catching hackers before they do real damage to a network. IDSes can be either network- or host-based. A host-based intrusion detection system is...

  The CISO (chief information security officer) is a senior-level executive responsible for developing and implementing an information security program, which includes procedures and policies designed to protect enterprise communications, systems and assets from both internal and external threats. The CISO may also work alongside the chief information officer to procure cybersecurity products and services and to manage disaster recovery and business continuity plans. The chief information security officer may also be referred to as the chief security architect, the security manager, the corporate security officer or the information security manager, depending on the company's structure and existing titles. While the CISO is also responsible for the overall corporate security of the company, which includes its employees and facilities, he or she may simply be called the chief security officer (CSO). CISO role and responsibilities Instea...