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: "split architecture for large scale wide area networks"
  Abstract: This report defines a carrier-grade split architecture based on requirements identified during the SPARC project. It presents the SplitArchitecture proposal, the SPARC concept for Software Defined Networking (SDN) introduced for large-scale wide area networks such as access/aggregation networks, and evaluates technical issues against architectural trade-offs. First we present the control and management architecture of the proposed SplitArchitecture. Here, we discuss a recursive control architecture consisting of hierarchically stacked control planes and provide initial considerations regarding network management integration to SDN in general and SplitArchitecture in particular. Next, OpenFlow extensions to support the carrier-grade SplitArchitecture are discussed. These are: a) Openness & Extensibility; b) Virtualization; c) OAM; d) Resiliency approaches; e) Bootstrapping and topology discovery; f) Service creation; g) Energy-efficient networking; h) QoS aspects; and i) Multilayer aspects. In addition, we discuss selected deployment and adoption scenarios faced by modern operator networks, such as service creation scenarios and peering aspects, i.e., how to interconnect with legacy networks. Finally, we indicate how our SplitArchitecture approach meets carrier grade scalability requirements in access/aggregation network scenarios

Connected through hyperedge HE-1 (induced by source paper "software defined networking a comprehensive survey"):
  with members:
    - "splitarchitecture sdn for the carrier domain"
    - "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"
    - "research directions in network service chaining"

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)