netwyman

Network Service a capability that facilitates a   network  operation. It typically is provided by a   server  (which can be running one or more services), based on network  protocols  running at the   application  layer in the   Open Systems Interconnection (OSI)   model   of the   network . Some examples are   domain name system (DNS) ,   dynamic host configuration protocol (DHCP) ,   voice over internet protocol (VoIP) , etc. As defined by Network Functions Virtualization (NFV)  ETSI  Industry Specification Group (ISG) in the  Network Functions Virtualisation (NFV); Terminology for Main Concepts in NFV , a network service is a composition of  network functions  and defined by its functional and behavioral specification. Computer Network Services and Solutions Routing & Switching   Utilizing the latest in Cisco technology. Utilize VLAN’s ...

High availability (HA) is the ability of a system or system component to be continuously operational for a desirably long length of time. Availability can be measured relative to "100% operational" or "never failing." In information technology (IT), a widely-held but difficult-to-achieve standard of availability for a system or product is known as "five 9s" (99.999 percent) availability. Availability experts emphasize that, for any system to be highly available, the parts of a system should be well-designed and thoroughly tested before they are used. Since a computer system or a network consists of many parts in which all parts usually need to be present in order for the whole to be operational, much planning for high availability centers around backup and failover processing and data storage and access. How availability is measured availability percentage is calculated as Below: Availability = (minutes in a month - minutes of downtime) * 100/...