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: "snf serverless network functions"
  Abstract: It is increasingly common to outsource network functions (NFs) to the cloud. However, no cloud providers offer NFs-as-a-Service (NFaaS) that allows users to run custom NFs. Our work addresses how a cloud provider can offer NFaaS. We use the emerging serverless computing paradigm as it has the right building blocks - usage-based billing, convenient event-driven programming model and automatic compute elasticity. Towards this end, we identify two core limitations of existing serverless platforms to support demanding stateful NFs - coupling of the billing and work assignment granularities, and state sharing via an external store. We develop a novel NFaaS framework, SNF, that overcomes these issues using two ideas. SNF allocates work at the granularity of flowlets observed in network traffic, whereas billing and programming occur on the basis of packets. SNF embellishes serverless platforms with ephemeral state that lasts for the duration of the flowlet and supports high performance state operations between compute units in a peer-to-peer manner. We present algorithms for work allocation and state maintenance, and demonstrate that our SNF prototype dynamically adapts compute resources for various stateful NFs based on traffic demand at very fine time scales, with minimal overheads.

Connected through hyperedge HE-1 (induced by source paper "nfv platform design a survey"):
  with members:
    - "network service orchestration a survey"
    - "nfvactor a resilient nfv system using the distributed actor model"
    - "sonata service programming and orchestration for virtualized software networks"
    - "lightbox full stack protected stateful middlebox at lightning speed"
    - "correctness and performance for stateful chained network functions"
    - "splitbox toward efficient private network function virtualization"
    - "network function virtualization state of the art and research challenges"

Connected through hyperedge HE-2 (induced by source paper "design of nfv platforms a survey"):
  with members:
    - "network service orchestration a survey"
    - "nfvactor a resilient nfv system using the distributed actor model"
    - "sonata service programming and orchestration for virtualized software networks"
    - "lightbox full stack protected stateful middlebox at lightning speed"
    - "correctness and performance for stateful chained network functions"
    - "network function virtualization state of the art and research challenges"

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.DC(Distributed, Parallel, and Cluster Computing)