Briefly Describes the Difference Between Sans and Nas System Essay

in short let ons the difference amid retentivity country Networks (SANs) and Network Attached Storage (NAS) brass? Storage Area Networks (SANs) Network Attached Storage (NAS) system A SAN is a dedicated interlock that provides access code to various types of repositing devices including type libraries, optical juke boxes and disk arrays. Network Attached retentivity system atomic add together 18 networked appliances which contain one or more intemperately drives that can be sh bed with multiple heterogeneous computers. A SAN is a local network of multiple devices that operate on disk blocks. A NAS is a single storage device that operate on info files A SAN commonly utilizes Fibre Channel interconnects. A NAS typic entirelyy makes Ethernet and transmission control protocol/IPconnections.Identify and briefly describe for each one(prenominal) of TCP/IPS five form?The basic structure of communication networks is instanceed by the Transmission Control Protocol/Internet Protocol (TCP/IP) model. This model is structured in five horizontal surfaces. An end system, an intermediate network node, or each communicating wasting diseaser or program is equipped with devices to run each(prenominal) or just about portions of these floors, depending on where the system operates. These five layers, argon as follows Application layerHost to legions or transport layerInternal layerNetwork access layerPhysical layerPhysical layerThe physical layer covers the physical interface between a entropy transmission device and a transmission spiritualist or network. This layer concerned with specifying the characteristics of the transmission medium the nature of the signals the data rate and related matters.Application layerThe Aplication layer, determines how a specific user application should use a network. Among such applications are the Simple light Transfer Protocol (SMTP), File Transfer Protocol (FTP), and the World wide of the mark Web (WWW) .Host to host or transport layerThe becharm layer, lies just above the network layer and handles the details of data transmission. horizontal surface 4 is implemented in the end-points but not in network routers and acts as an interface protocol between a communicating host and a network. Consequently, this layer provides logical communication between processes running on different hosts.Network access layerThe Network layer specifies the networking aspects. This layer handles the way that addresses are assigned to packets and the way that packets are supposed to be forwarded from one end point to another.Internal layerThis inbred protocol(IP) is utilise in this layer to provide the routing functions across multiple networks. The function of the internal layer is to allow procedure to take in order for data traverse of multiple interconnected networks to take place. This protocol is implemented in both the end system and routers.Contrast the major characteristics of WANs with those of LANs & MANs?WANs LANs MANsIts is wide Area Networks It is Local Area Netwoks It is Metropolitan Area Networks It consist of a procedure of interconnected switching modes Lan is a communication networks that interconnected a variety of devices and provides a means for information exchange among those devices. It occupies a bosom ground between LANs and WANs. How m both quantization levels are needed to represent each of the following sets of symbols characters or states?a) The uppercase alphabet A,BZ8*26 = 208 bitsb) The digits 0,1.98*10 = 80 bitsc) 256 different colours8*256 = 2048d) 10000 Han characters8*10000 = 80000e) Four billion computing devices8* four billion = 32 billionCommonly, medical digital radioscopy ultrasound studies consist of about 25 images extracted from a full-motion ultrasound examination. severally image consists of 512 by 512 pixels, each with 8 bits of intensity information. a. How many bits are there in the 25 images?25 Images1 Image = 512*512 pixels1 pixel = 8 bits8*512 = 4,096 *512 = 2, 097,152 * 25 images = 52, 428, 800 bits in the 25 imagesb. Ideally, so far doctors would like to use 512*512 * 8 bits frames at 30 fps (frames per secondmentond). Ignoring possible compaction and overhead factors, what is the minimum channel readiness required sustaining this full-motion ultrasound? 512*512 = 262,144 * 8 bits = 2,097,152 * 30fps = 62,914,560 bitsc. Suppose each full motion study consists of 25s of frames. How many bytes of storsge would be needed to store a single study in up comprossed form? 600 MB = 629145600 bytes *8 = 5,033,164,800512*512=262144* 8 bits = 2,097,152 * 30 fps = 62,914,560 *25 sec = 1,572,864,000 5,033,164,800/1572864000 = 3.2Do some online research on the characteristics of software as a religious service (Saas) platform as a service (Paas) and infrastructure as a go (Iaas) write a short paper describe the different between these services andidentifying some of te major providers of each type?Saas-SaaS or sof tware as a return refers to the pitch shot of applications over the Internet as a service that can be accessed by users. Instead of users having to install and maintain software, they simply access this through with(predicate) the Internet. This frees them from the management of complex software as well as ironware and explains why SaaS in Australia continues to gain great popularity among users.The applications offered by SaaS are at times referred to as hosted software, software on demand or web- found software. The provider generally manages access to the applications, availability, performance as well as security. This relieves customers of the burden of installing, maintaining or updating hardware or software. To access these applications, all a user requires is an Internet connection.Some of the characteristics Software as a Service will offer you and which will help you answer the hesitation what is SaaS are as followsIt is a multitenant architecture- this means that al l users and applications make use of a single, common infrastructure as well as a code base that is maintained centrally. This enables vendors to innovate more quickly thus saving valuable time that would initially have been spent in maintaining different versions of out-dated codes.Allows for easy customisation every customer is able to customise applications so that they can fit into their business processes and without necessarily affecting the common infrastructure. These customizations are rather unique to each user or company and are often preserved through making upgrades.Provides better access SaaS improves access to data as you can access it from anywhere as bulky as you have an Internet connection. This makes it easier for members to collaborate with one another as they can access the same information irrespective of where they are located.many organisations are turning to SaaS because it is easier to implement and does not require users to pay any up-front licensing f ees. It is also inexpensive and hence its popularity with small and medium sized companies.In todays economy, every business is out to save some money. SaaS seems to be working positively for many businesses and a good number has already bosomd it. Although large companies have been a little hesitant to embrace it because of the limited functionality that comes with it, many others have already taken up this engineering and only time can tell what its future will be.major(ip) service providers of SaaS are NetSuite, Rackspace, Softlayer ,Go Grid, Microsoft, salesforce etc.PaaSPlatform as a Service (PaaS) is a way to rent hardware, operating systems, storage and network capacity over the Internet. The service delivery model allows the customer to rent virtualized servers and associated services for running existing applications or developing and testing new ones.major(ip) service providers of SaaS are IBM, Orangescape,Google, OS33, Gigaspace.IaaSInfrastructure as a Service is a provi sion model in which an organization outsources the equipment used to support operations, including storage, hardware, servers and networking components. The service provider owns the equipment and is responsible for housing, running and maintaining it. The client typically pays on a per-use basis.Characteristics and components of IaaS includeUtility computing service and billing model.Automation of administrative tasks.Dynamic scaling.Desktop virtualization.Policy-based services.Internet connectivity.IaaS is one of three main categories of debauch computingservice. The other two are Software as a Service (SaaS)and Platform as a Service (PaaS).Infrastructure as a Service is sometimes referred to asHardware as a Service (HaaS).Major service providers of IaaS are Gogrid, Hp.Logicworks, Amazon web services,