In such SDN architecture, enhancing the QoE became easier by implementing specific algorithms within the controller entity. It is not necessary that a client may have just one service provider (server). You will replace some of these systems with new applications; others will go because they are not compatible with NaaS. The service control part of the TINA paradigm, and the corresponding distinctions between the user and provider view that TINA provides through the session model, can facilitate the integrated design and implementation of charging and accounting mechanisms. This emerging architecture continues to evolve in a handful of important ways. Services to help your organization decide how to use a service-oriented architecture. An autonomous system (AS) is a collection of connected Internet Protocol (IP) routing prefixes under the control of one or more network operators on behalf of a single administrative entity or domain that presents a common, clearly defined routing policy to the internet.. In this network architecture, the server is a service provider and the client becomes the consumer of that service. New business models like network as a service promise that efficiency, through an on-demand provisioning model. In the past, agencies practiced network modernization through annual lifecycle refreshes of hardware, which took many resources and years to accomplish. Firewall architecture is responsible for the standards and frameworks associated with the architecture of sub-networks (aka subnets), which are a subdivision of an IP or TCP/IP network that exposes the company’s services to a larger untrusted network, such as the Internet. The SDN architecture defines also the key interfaces between the different layers, which are East/West bound API that are implemented by the different controllers of the SDN and used to facilitate communications between them. The depth or feature channel size of the blocks increases with the depth of the network. Finally, three fully connected layers and a soft-max function map the features into label probabilities at the tail of the VGG network. It is worth to mention that, since the ceiling or floor regions are located at the top and bottom of the images, using locally connected layer might provide an interesting insight and research direction for segmentation of indoor images. Network architecture is the logical and physical interconnection of all elements between a signal's generation and its termination. Stephen R. Guendert, in Handbook of Fiber Optic Data Communication (Fourth Edition), 2013. SDN architecture presents a new solution that consists of separating the control plane from the data plane which is typically coupled together. SD-WAN architecture is a virtualized overlay on top of physical infrastructure. Performance monitoring enables enterprises to model the performance of applications and the underlying infrastructure over time. The channels in the convolutional layers can be interpreted as filters, highlighting patterns in an image that the network has learned from the training data. Image classification is a very active research field, and recent developments can be tracked from the results reported at the annual ILSVCR competition [1]. SNA over IP solutions are designed to connect enterprise applications built on top of the SNA architecture over a wide area. Manoj Wadekar, in Handbook of Fiber Optic Data Communication (Fourth Edition), 2013. There are countless examples of XaaS, but the most common encompass the three general cloud computing models: Software as a Service (SaaS), Platform as a Service (PaaS) and Infrastructure as a Service (IaaS). Any IB device can be connected with one or multiple IB devices or switches. In this new architecture each Network Function (NF) offers one or more services to other NFs via Application Programming Interfaces (API). Connectivity architecture. This separation between the two layers simplifies the network management and help to simply program network control. Software as a service (SaaS) is one of these categories; others include platform as a service (PaaS) and infrastructure as a service (IaaS). This paper addresses the novel notion of offering a radio access network as a service. 3.2A. from IaaS as is shown in the figure below. NaaS can include flexible and extended Virtual Private Network (VPN), bandwidth on demand, custom routing, multicast … Deliver consistent, low-latency experience to your customers through services that work across on-premises, multi-cloud, and edge location seamlessly. When testing network as a service using parallel processing where the NaaS and the existing networking run in tandem, the company has to consider legacy systems it will eliminate with the migration. Network as a Service Networks are evolving in non-traditional ways: new solutions bring cost savings, flexibility and answers to security and IoT-related challenges. One or multiple links can be used for such connectivity. A client may have multiple servers. It is noteworthy that VGG networks are not considered as the best network architecture for image classification problems due to their accuracy, the number of parameters learned, and the inference time. of service, all offered on demand over the Internet in a pay-as-you-go model. The following steps describe how a connection is established to Azure SQL Database: Clients connect to the gateway, that has a public IP address and listens on port 1433. 3.2A. It can cover the entire spectrum – from specifying your application and business process portfolio, to your communication, IT and asset infrastructure needs. In a traditional network architecture, all outbound Internet connections traverse the corporate network, and egress from a central location. The transport layer binds to names and not to IP information. In 2016, the NaaS market was valued at $1.85 billion, according to data from Stratistics MRC., a market research company The same data predicts the market will reach a $22.5 billion valuation by 2022 at a compound annual growth rate of 51.6% over the six-year period. Our Architecture-as-a-Service delivery model accelerates your architecture planning activities. Southbound API is implemented by the different forwarding devices in the SDN and enabling the communication between these devices and the controllers. Remote data placement is achieved directly between source nodes and destination nodes—so data copy is avoided and OS involvement is minimized. The TINA architecture identifies the characteristics of a universal distributed processing environment for integrated service control and management. This flowchart enabled Prescient to set priorities, address dependencies, and set and meet timeline requirements for the services it needed to migrate. Intel … This factors out networking, firewalls, related security, etc. "Speaking of SD-WAN, anyone moving to NaaS should be using SD-WAN to increase availability at every location through redundant connectivity.". By setting up tests carefully, the enterprise enables each network location and service to talk to the others during the transition. Fiber-deep architectures will be covered in Chapter 11; the relationship between network architecture and service reliability and availability will be dealt with in Chapter 12. Focus on delivering your application logic when you use network-as-a-service offerings from Azure Networking. Configuring and operating routers and protocols, WAN optimizers and other components, such as firewalls or software-defined-WAN endpoints, can be complicated. Each end node can be a processing node, an I/O unit, or a storage subsystem. We use cookies to help provide and enhance our service and tailor content and ads. Often a step up from the network engineer role, which implements and tests networks, an architect looks at the big picture and what's needed over the next three to five years. It is also based on the pay-per-use model. These types of network architecture are commonly divided into tiers. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. URL:, URL:, URL:, URL:, URL:, URL:, URL:, URL:, URL:, Deploying Systems Network Architecture (SNA) in IP-Based Environments, Handbook of Fiber Optic Data Communication (Fourth Edition), SSIM and ML based QoE enhancement approach in SDN context, Architectures and management of submarine networks, Olivier Courtois, Caroline Bardelay-Guyot, in, Undersea Fiber Communication Systems (Second Edition), Multimodal Semantic Segmentation: Fusion of RGB and Depth Data in Convolutional Neural Networks. For legend, see the left bottom corner. Copyright © 2020 Elsevier B.V. or its licensors or contributors. James V. Luisi, in Pragmatic Enterprise Architecture, 2014. It’s difficult to run NaaS in parallel with existing networking for each site. Product listings to connect you to the vendor sites for each of the technologies. As a result, file transfer architecture collaborates with firewall architecture, infrastructure architecture, compliance architecture, data obfuscation architecture, and data governance. One such approach is the network service architecture we have developed in prior work [2], [3]. The SDN manages in such case to enable new functionalities such as QoE monitoring and enforcement functions. The enterprise must perform extended tests of NaaS in parallel with the existing network infrastructure for every site and migrate one site at a time. With a hierarchical architecture, multiple installations of management systems are used to monitor the whole network.Each management system is installed at a NOC that is responsible to monitor a geographical or administration region / domain, i.e. A split between control and data path nodes is performed, so a centralized controller has a global view of the network while the data plane includes devices which simply forward packets following rules expressed by the controller. As companies strive to run IT more efficiently, they are looking for ways to operate and manage their networks. Network as a service can afford companies greater flexibility and even performance gains in their network infrastructure. DONA also assures that the shortest path is found for certain data, as packets are forwarded to the data servers closest to the node requesting the data. The latest deep models that outperform VGG contain significantly more convolutional layers. The Northbound API is Implemented by the controllers of the SDN and used to facilitate the communication between controllers and the network management applications. David Geer writes about cybersecurity and technology for national and international publication. While this field is rapidly evolving, current data fusion networks typically adopt the VGG network due to its simple architecture. Deep neural network architectures: (A) VGG-16 is a single image classifier [18], (B) SegNet is used for pixel-level image segmentation and labeling using an encoder–decoder type structure [6], (C) FuseNet developed for combining RGB and depth data [26], and (D) VNet is used for remote sensing data fusion of infra-red images and digital surface models [11]. Outsourcing even some aspects of network infrastructure can mean less direct control over your network. Bruno Sousa, ... Marilia Curado, in Advances in Computers, 2013. In order to communicate between these two layers, an open standard protocol is employed. Jerry Irvine, a CIO at Prescient Solutions, an IT services company in Schaumburg, Ill., said, "NaaS enabled our remote consultants who work from multiple locations to share systems, infrastructure and data." "Those hiccups should be limited to the site you are migrating at the moment.". EE offers the potential for true end-to-end SNA over IP transport between the branch and the data center. 1 and 2 demonstrate the multiple components of an SDN architecture which is based on three layers separated by open interfaces. You can check out Geer’s LinkedIn profile as well as his Google Scholar page. An SDN-based Architecture for Network-as-a-Service Mani Prashanth Varma Manthena , Niels L. M. van Adrichem , Casper van den Broekyand Fernando Kuipers Network Architectures and Services, Delft University of Technology yICT - Service Enabling and Management, TNO Mekelweg 4, 2628 CD Delft, The Netherlands Postbus 5050, 2600 GB Delft, The Netherlands "The degree of visibility you can get should be one of your selection criteria for choosing a NaaS provider," Burke said. Network as a Service (NaaS) is sometimes listed as a separate Cloud provider along with Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). In using a separate port number for each of the five SNA classes of service, it is then possible to maintain the SNA prioritization in the IP network by assigning differentiated services (DS) settings (previously known as type of service or TOS) per UDP port that will match the relative priorities of the SNA COS definitions. Geer’s work appears in various trade magazines from IDG in the U.S. and around the world in several languages. The latest implementations add batch normalization and drop-out layers to the originally reported VGG network in order to improve training and the generalization of the network [22]. Auditor-level visibility, a customer portal, ticket systems integrations, and open communications with technical support will offer enough control to satisfy many enterprises, given the NaaS benefits they'll gain. These five UDP ports include one UDP port per SNA class of service (COS). TINA extends the frameworks of TMN and IN, aiming at supporting a wide range of services and applications, independently of the underlying transport network. The migration process can also pose challenges. In VGG and other networks, the convolution is implemented as shared convolution, not as a locally connected layer [15, p. 341] to handle fewer parameters, speed up the training, and use less memory. For this reason, ResNet utilizes residual connections that allow for training a 1000-layer deep network; see [21]. Most notable networks from this competition are LeNet-5 [16], AlexNet [17], VGG [18], GoogLeNet [19], DenseNet [20] and ResNet [21]. During trials, make sure the new solution is reliable before cutting over. "Some companies that go with SD-WAN [software-defined wide area network] using NaaS report moving 10, 50 or 100 sites a night once they've got the process down," he said. "You need to set expectations for yourselves, your employees, and anyone using the network during the transition, as there can be hiccups in services for performance or availability," Burke said. Leverage the content delivery network Leveraging Amazon CloudFront and its edge locations as part of the solution architecture can enable your application or service to scale rapidly and reliably at a global level, without adding any complexity to the solution. In a glimpse, this new architecture called as Service-Based Architecture (SBA), is built using IT network principles and cloud native technology. This was a large information technology fad around 2005 that saw many top down implementations that involved buying a bunch of software and then redesigning existing … This service uses the virtualized network infrastructure & provides users & customers with network services securely. In addition, DONA includes failure detection mechanisms and supports concurrent use of multiple connections. This involves analy… Example Enterprise Service-Oriented Architecture with Cloud Computing. But experts indicate that migrating networks can bring substantial benefits in ease of management, increased network availability and reliability. TINA has extensively adopted the main principles of object-oriented design, modelling the service functional, computational and information entities to independent building blocks. Chapter 9 dealt with ways of measuring architecture-related parameters and the needs of various types of services. Unfortunately, no public code is available. As Microsoft's cloud offerings have matured, a distributed Internet-facing network architecture has become critical for … The SDN controller plane represents the main entity in the network that facilitates the creation/destruction of network paths. HPR over IP allows the end user to implement IP connectivity from the branch-based workstation right into the data center, even right to z/OS itself for System z (in other words, end to end) without depending on any traditional SNA network infrastructure components. Taking another look at it, from the topology perspective of APPN, EE merely looks upon the entire IP network as a single-hop HPR link. Other usages refer only to the actual physical parts of those systems. (Redirected from Network architect) Network architecture is the design of a computer network. EE uses an IP network as the SNA HPR link. See the sidebar “A Cloud Computing Taxonomy” on page 3 for more details. Shared weights within one channel assumes that the same features appear at various locations of the input images. Companies need to test NaaS infrastructure from the data center to the branches in parallel with their current networking infrastructure. The SDN application plane is a layer composed of a variety of applications that communicate via Northbound APIs. In some cases, it refers to the planning, specifications and placement of physical parts of a networked system, such as a phone or computer network. Staff without a vested interest-- including some whose systems the company will eliminate -- may not test systems rigorously, which could doom a NaaS implementation, he explained. Generally speaking, companies aren't looking for cost savings, but rather ample IT and business benefits. These factors together reduce overall latency as well as CPU overhead (Figure 11.2). SOA allows users to combine a large number of facilities from existing services to form applications. From the TCP/IP perspective, EE is just another UDP application. The challenges of migrating networks to the cloud include the tradeoffs associated with other kinds of outsourcing, such as ceding too much control of network assets. Build a 5G network that is cost-efficient, simplified, and trustworthy. Cisco Digital Network Architecture (Cisco DNA), $22.5 billion valuation by 2022 at a compound annual growth rate of 51.6%. Bizliner’s … Prescient eventually felt comfortable using NaaS to connect it to even its proprietary applications, which the company moved to the cloud. Thorough testing pays dividends. Not to be confused with use of the term “network architecture” when it pertains to the participating nodes of a distributed application and database architecture, this taxonomy of enterprise architecture refers to the application and database usage as “application and database network architecture.”. Network architecture can be many different things. Several variations of the VGG network exist, which differ in the number of blocks. Many of Prescient Solutions' systems and apps are in the cloud, as well as its networking. However, this solution requires specialized router software (the SNASw feature), which includes customized extensions to completely support the SNA requirements. Chapter 9 dealt with ways of measuring architecture-related parameters and the needs of various types of services. Network-as-a-Service: A modern solution to today’s networking challenges Cloud migration and mobility are putting huge pressure on networks. Network as a Service. “But when you factor in labor cost on the staff side, NaaS can be cost-neutral or provide some savings. NaaS providers maintain & manage network resources, which decrease the workload of customers/users. With on-demand purchasing, companies can be more cost-conscious and pay only for the networking services they need. That's a core part of our business, so it doesn't make sense for us to outsource that somewhere else," said Phil Mogavero, vice president of network solutions at PCM, based in El Segundo, Calif. PCM is a public company with access to capital, often amortizing its hardware over more than three years. The SNA over IP translation points are either supported in the IP router, on servers at the end of the IP network, or mixed (i.e., router solution in the branch and server solution in the data center (Figure 1). Customers should negotiate with their provider for network visibility to monitor performance and gauge the quality of service. The reader can find comparisons of various CNNs in [23]. By continuing you agree to the use of cookies. Most commonly used image classifier that is also adopted in many data fusion architectures is the VGG developed by the Visual Geometry Group at University of Oxford. Network architecture includes their associated hardware, software, and connectivity within the facilities of the company and to external communications service providers, as well as plans for monitoring and assessing the various components and touch points to external service providers. Network architectures developed for data fusion heavily rely on the results achieved in image classification using CNNs. The migration process is risky. The main concept of SDN architecture consists on the separation between control and forwarding functions. NaaS (Network as a Service) allows users to access network infrastructure directly. "Enterprises should make sure to get the broadest degree of control over optimization and traffic prioritization policies that they can," Burke continued. Network as a service can afford companies greater flexibility and even performance gains in their network infrastructure. From the IP perspective, HPR over IP looks like any other User Datagram Protocol (UDP)-based application. As companies strive to run IT more efficiently, they are looking for ways to operate and manage their networks. This enables very low latency data transfers and also low CPU utilization for Inter Process Communication (IPC) applications. Figure 3.2. Still, NaaS has to make sense in the context of your company’s infrastructure. The integration of a CDN can take different forms depending on the solution use case. "NaaS offers ROI [return on investment], enabling customers to trade Capex for Opex and refocus person hours on other priorities," said John Burke, research leader at Nemertes Research in Mokena, Ill. Companies should manage as much of the infrastructure as they want directly through a portal. If somebody in the company notices a problem and reports it to the help desk, throwing a ticket there should automatically throw something up for the provider on their ticketing system," Burke explained. Olivier Courtois, Caroline Bardelay-Guyot, in Undersea Fiber Communication Systems (Second Edition), 2016, Networks flexibility with branching unit 347, Basic network feature with OADM-BU (no wavelength reuse) 357, Integration and protection of the terrestrial link in the submarine system design 360, Zoltan Koppanyi, ... Alper Yilmaz, in Multimodal Scene Understanding, 2019. The architecture provides a networking foundation that is easier to … Users have more devices, expect more bandwidth and a better experience, and need to connect anytime, anywhere. IBA allows communication between these participating nodes using the RDMA protocol. For example, VGG-16 network indicates that the network consists of 13 layers of convolutional-ReLU pairs as well as three fully connected layers resulting in 16 blocks; see Fig. The Figs. With NaaS, those responsibilities are handled by a third-party provider and then made available to enterprise … They simply execute the controller's rules. However, EE is an extension to HPR, and HPR uses the Rapid Transport Protocol (RTP) layer in the SNA protocol stack to achieve the levels of required reliability. The benefits are driving market expansion. Rather than using a more out-of-the-box NaaS vendor offering, Prescient Solutions opted for a complex, custom migration approach to address well-defined dependencies between its diverse applications and systems to meet client services requirements. "You can do this using your data center or a cloud gateway that your NaaS provider makes available as a service," Burke said. wide area networks (WAN) (i.e., long distances over 100 km). "The staff you include in the beta testing should be SMEs [subject-matter experts] in the systems you will move to NaaS and should have an interest in the movement to [ensure] that you overcome all the inherent migration challenges," Irvine said. Cloudflare, an American web-infrastructure and website-security company, recently introduced a cloud-based network-as-a-service solution for … Network functions traditionally realized in specific hardware can now be abstracted and virtualized on any equipment. The global architecture of these subnets has long-term implications to a company’s ability to protect its networks while providing necessary access to support internal communications across data centers, company facilities, and vendors. Cutting over to NaaS without sufficient testing can leave sites with buggy networks. The IBA network is comprised of multiple subnets that can be connected through routers. But planning and careful testing are essential. "NaaS gives the business the agility to quickly start a branch at location X, with the provider shipping a thin client so you can get on the WAN [wide area network] instantly, while experiencing fewer network outages over the life of the service," Burke said. "You need to develop a relationship with the NaaS provider's technical support organization and optimize your interactions to get the service you want, despite having less control over how they deliver it," Burke said. SD-WAN enables communications service providers (Comms SPs) to offer enterprises a secure, flexible branch connectivity architecture that helps them move up from their traditional technology offerings like MPLS and Broadband. Cisco Consulting Services sees an opportunity for network service providers (SPs) to deliver a similar experience through a new solution architecture that we call network as a service (NaaS). One other key point about EE is that it uses the UDP transport layer. The range of flexible options associated with EE makes it the natural choice for modernizing your existing SNA network. Unlike ETL which usually transports parts of databases within the same data center, file transfer architecture is responsible for the standards and frameworks for all methods of file transfer that are transported, such as FTP, SFTP, and AS2 to and from all data centers globally including all aspects of their approval process and security, as well as the use of digital signatures (e.g., PGP), SSL and various data encryption/decryption technologies, and high security certificates. What this then does is provide the IP network routers with IP packet priority information based on the original SNA network priorities. Enterprises that can work out trade-offs in direct control of network infrastructure can buy into the agility, availability, and reliability that NaaS offers. While some companies’ implementations have demonstrated advantages, others are waiting to see the pros emerge. In the first convolution layer, these patterns, referred to as features, are associated with basic/primitive image content; for instance, corners, edges, etc. Asma Ben Letaifa, in Advances in Computers, 2019. In addition, the IP router can provide EE capabilities allowing the branch router to drive the SNA traffic all the way to the host (i.e., no need for an EN in the data center). "We started with a complete systems and application inventory, then defined an application flow map for all infrastructure, systems and data that our applications touch, traverse or utilize," Irvine said. By adopting this model, the network conceptually becomes a service in itself compared to the legacy model, where the network was simply a foundational service delivery artifact. New business models like network as a service promise that efficiency, through an on-demand provisioning model. Deeper in the network, the features describe complex relationships of these basic image content; for more details see [15, p. 360]. To train these deeper networks is harder due to the propagation of potential numerical errors stemming from very low residuals in the training step. While NaaS has been touted as a cost saver, the reality is that there are few cost savings that come from migration. DONA [162] proposes a new clean-state architecture, where names are generated based on public key mechanisms, routing is based on names and name resolution relies on specific handlers that reply to clients in the presence of “find” packets. The demands placed on enterprise networks are unsustainable. Negotiate auditor-level visibility to ensure auditors are satisfied that the vendor is securing the infrastructure appropriately, he added. Network architecture is the logical and physical interconnection of all elements between a signal's generation and its termination. Network as a service (NaaS) is a business model for delivering enterprise-wide area network services virtually on a subscription basis. It's responsible for management, reporting functionalities such as monitoring or security. UDP is a connectionless, best-effort transport, nonreliable protocol so at first glance it seems to be an odd choice for the reliability we typically associate with the mainframe and SNA networking. The TINA approach to the latter is described in the TINA Accounting Management Architecture [1]. Network architecture is responsible for standards and frameworks for the various layers of communications networks, such as the seven open systems interconnection model, which includes: These standards and frameworks address the types of networks, such as: local area networks (LAN) (i.e., under a kilometer), metropolitan area networks (MAN) (i.e., under a hundred kilometers), and. It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as communication protocols used. The SDN data plane includes different devices deprived from any intelligence. For end users who have enabled APPN with HPR, transport of the SNA HPR data over an IP network is quite simple: You define the HPR EE link and configure the local TCP/IP environment to support five UDP port numbers used by EE (12000–12004). A NaaS company would look at the hardware and the migration cost, then amortize and depreciate it. The Cisco cloud-to-client approach unifies multivendor mobile solutions into an open, cloud-native architecture so you can deploy services your customers want, when and where they need them. The EE solution, more formally known as SNA APPN with High Performance Routing over IP (HPR over IP) is embedded in z/OS for the data center and is available on servers attached to the IP network at the branch. Typical SDN Controllers are OpenDaylight and Floodlight. The router solution provides flexible options, which allow the IP router to act as a concentrator at the branch (using DLSw) and as an end node (EN) in the data center. Service Oriented Architecture (SOA) Service oriented architecture was an early term for service architecture that was adopted and marketed by many large IT vendors who used it to sell SOA platforms and middleware. Large companies use TCP/IP (i.e., transmission control protocol/Internet protocol) as the network protocol of choice, which is a protocol maintained by the Internet engineering task force (IETF) that organizes the functionality of the protocol into four layers specifying how data should be: For example, from highest to lowest, the layers of TCP/IP consist of the following: In firewall architecture, the architecture of subnets is used to create a DMZ, a term derived from “demilitarized zone,” to create a perimeter of around and between the networks of the enterprise that could be vulnerable to attack from users outside the networks of the company. Find a provider that offers APIs [application programming interfaces] to integrate the customer's ticketing system with theirs. If, however, you want to get the most out of your IP network, using the latest switching/routing hardware paired with the TN3270 emulation software or EE software is the most robust, flexible, and cost-effective solution for your enterprise. "In many cases, NaaS will have a higher cost than doing it yourself,” Burke said. As a senior position in an IT organization, a network architect is responsible for designing computer networks, including local area networks (LANs), wide area networks (WANs), Internet connections, intranets and other data communications systems. VGG is composed of blocks of 2 to 3 convolution-ReLU (Rectified Linear Units) pairs and a max-pooling layer at the end of each block; see Fig. Service-Oriented Architecture (SOA) is an architectural approach in which applications make use of services available in the network. But the company has its own network operations center to support its business and that of its customers, and it uses IT service management for its processes. Communication between the objects is established through the Distributed Processing Model, according to the definitions of the Object Management Group [10]. "That's a more expensive option than purchasing the equipment ourselves," Mogavero said. By considering the costs, bargaining for everything you need for peace of mind, and planning ahead for a six-month trial with methodical testing and lots of hand holding from your new provider, you can make the move to NaaS without regrets. But planning and careful testing are essential. "If the vendor throws up a ticket that they're going to be doing some maintenance, it will replicate down into the enterprise's system. This solution can be as varied as software deployed on a per-terminal basis or concentrated on scalable servers from Windows to pSeries to zSeries Business Continuity (BC) solutions. Optimal routing for best performance In this architecture, services are provided to form applications, through a communication call over the internet. Networking-as-a-service (NaaS) is the sale of network services from third parties to customers that don’t want to build their own networking infrastructure… The following diagram is an example of a service-oriented architecture using Web Services. David Large, James Farmer, in Broadband Cable Access Networks, 2009. PCM enlists telcos to provide WAN connectivity, some using software-defined networking. This chapter will first delineate each of the elements from which an architecture is constructed and then present some examples of high-level HFC distribution networks that have been proposed or built. network as a service (NaaS) can also help companies that want greater flexibility in provisioning without having to rearchitect networks or redo contracts from the ground up. But companies need to be cautious about how they use NaaS. From the APPN viewpoint, the IP network appears like any other HPR link in a normal APPN HPR topology. "We've developed these processes over a long time to support our infrastructure. Hyperflow is one representative example of such APIs. The following diagram provides a high-level overview of the connectivity architecture. For such APIs, we can enumerate OpenFlow or NetConf. Network as a service enables companies to use their network with greater flexibility and dynamism, adjusting to application and service needs as they emerge. This assumption is generally valid for remote sensing and indoor images. "The NaaS migration process starts by doing test deployments in representative locations; then, you work out an excellent process for migration and use an extended pilot of that process to make sure you iron out all the wrinkles," Burke said.

network as a service architecture

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