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: "distributed service function chaining"
  Abstract: A service-function chain, or simply a chain, is an ordered sequence of service functions, e.g., firewalls and load balancers, composing a service. A chain deployment involves  selecting  and instantiating a number of virtual network functions (VNFs), i.e., softwarized service functions,  placing  VNF instances, and  routing  traffic through them. In the current optimization-models of a chain deployment, the instances of the same function are assumed to be identical, while typical service providers offer VNFs with heterogeneous throughput and resource configurations. The VNF instances of the same function are installed in a single physical machine, which limits a chain to the throughput of a few instances that can be installed in one physical machine. Furthermore, the  selection ,  placement , and  routing  problems are solved in isolation. We present distributed service function chaining that coordinates these operations, places VNF-instances of the same function  distributedly , and selects appropriate instances from typical VNF offerings. Such a deployment uses network resources more efficiently and decouples a chain’s throughput from that of physical machines. We formulate this deployment as a mixed integer programming (MIP) model, prove its NP-Hardness, and develop a local search heuristic called Kariz. Extensive experiments demonstrate that Kariz achieves a competitive acceptance-ratio of 76%–100% with an extra cost of less than 24% compared with the MIP model.

Connected through hyperedge HE-1 (induced by source paper "a virtual network customization framework for multicast services in nfv enabled core networks"):
  with members:
    - "air ground integrated vehicular network slicing with content pushing and caching"
    - "service overlay forest embedding for software defined cloud networks"
    - "network slicing for service oriented networks under resource constraints"
    - "vehicular communications a network layer perspective"
    - "service function chaining resource allocation a survey"
    - "scalable steiner tree for multicast communications in software defined networking"
    - "specifying and placing chains of virtual network functions"

Connected through hyperedge HE-2 (induced by source paper "robust online composition routing and nf placement for nfv enabled services"):
  with members:
    - "a virtual network customization framework for multicast services in nfv enabled core networks"
    - "near optimal online algorithms and fast approximation algorithms for resource allocation problems"
    - "service function chaining resource allocation a survey"
    - "online admission control and embedding of service chains"
    - "scalable steiner tree for multicast communications in software defined networking"
    - "competitive and deterministic embeddings of virtual networks"

Connected through hyperedge HE-3 (induced by source paper "joint reliability aware and cost efficient path allocation and vnf placement using sharing scheme"):
  with members:
    - "optimal virtual network function placement in multi cloud service function chaining architecture"
    - "implementation of virtual network function chaining through segment routing in a linux based nfv infrastructure"
    - "on the trade off between computational load and reliability for network function virtualization"
    - "an approximation algorithm for path computation and function placement in sdns"
    - "service chain and virtual network embeddings approximations using randomized rounding"

Connected through hyperedge HE-4 (induced by source paper "placement and routing optimization problem for service function chain state of art and future opportunities"):
  with members:
    - "a scalable approach for service chain mapping with multiple sc instances in a wide area network"
    - "shortest path and maximum flow problems under service function chaining constraints"

Connected through hyperedge HE-5 (induced by source paper "joint failure recovery fault prevention and energy efficient resource management for real time sfc in fog supported sdn"):
  with members:
    - "optimal virtual network function placement in multi cloud service function chaining architecture"
    - "implementation of virtual network function chaining through segment routing in a linux based nfv infrastructure"
    - "joint energy efficient and qos aware path allocation and vnf placement for service function chaining"
    - "an approximation algorithm for path computation and function placement in sdns"
    - "fog computing based radio access networks issues and challenges"
    - "service chain and virtual network embeddings approximations using randomized rounding"
    - "fog computing focusing on mobile users at the edge"

Connected through hyperedge HE-6 (induced by source paper "cpvnf cost efficient proactive vnf placement and chaining for value added services in content delivery networks"):
  with members:
    - "network function virtualization state of the art and research challenges"
    - "nfv based gateways for virtualized wireless sensor networks a case study"

Connected through hyperedge HE-7 (induced by source paper "supc sdn enabled universal policy checking in cloud network"):
  with members:
    - "a model for the analysis of security policies in service function chains"
    - "sics secure in cloud service function chaining"

Connected through hyperedge HE-8 (induced by source paper "distributed function chaining with anycast routing"):
  with members:
    - "implementation of virtual network function chaining through segment routing in a linux based nfv infrastructure"

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)