human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "applying operating system principles to sdn controller design"
  Abstract: Rather than creating yet another network controller which provides a framework in a specific (potentially new) programming language and runs as a monolithic application, in this paper we extend an existing operating system and leverage its software ecosystem in order to serve as a practical SDN controller. This paper introduces yanc, a controller platform for software-defined networks which exposes the network configuration and state as a file system, enabling user and system applications to interact through standard file I/O, and to easily take advantage of the tools available on the host operating system. In yanc, network applications are separate processes, are provided by multiple sources, and may be written in any language. Applications benefit from common and powerful technologies such as the virtual file system (VFS) layer, which we leverage to layer a distributed file system on top of, and Linux namespaces, which we use to isolate applications with different views (e.g., slices). In this paper we present the goals and design of yanc. Our initial prototype is built with the FUSE file system in user space on Linux and has been demonstrated with a simple static flow pusher application. Effectively, we are making Linux the network operating system.

Connected through hyperedge HE-1 (induced by source paper "sdn controllers benchmarking performance evaluation"):
  with members:
    - "privacy preserving ddos attack detection using cross domain traffic in software defined networks"
    - "zerosdn a message bus for flexible and light weight network control distribution in sdn"
    - "are today s sdn controllers ready for primetime"
    - "smartlight a practical fault tolerant sdn controller"

Connected through hyperedge HE-2 (induced by source paper "secure software defined networking based on blockchain"):
  with members:
    - "enhancing bitcoin security and performance with strong consistency via collective signing"
    - "software defined networking a comprehensive survey"
    - "disco distributed multi domain sdn controllers"

Connected through hyperedge HE-3 (induced by source paper "software defined networking a comprehensive survey"):
  with members:
    - "splitarchitecture sdn for the carrier domain"
    - "split architecture for large scale wide area networks"
    - "tinynbi distilling an api from essential openflow abstractions"
    - "emerging technologies and research challenges for 5g wireless networks"
    - "distributed and collaborative traffic monitoring in software defined networks"
    - "oshi open source hybrid ip sdn networking and its emulation on mininet and on distributed sdn testbeds"
    - "controlling a software defined network via distributed controllers"
    - "streamon a data plane programming abstraction for software defined stream monitoring"

Connected through hyperedge HE-4 (induced by source paper "failure based lifespan performance analysis of network fabric in modular data centers toward deployment in canada s north"):
  with members:
    - "architecture for modular data centers"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.NI(Networking and Internet Architecture)