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: "specifying and placing chains of virtual network functions"
  Abstract: Network appliances perform different functions on network flows and constitute an important part of an operator’s network. Normally, a set of chained network functions process network flows. Following the trend of virtualization of networks, virtualization of the network functions has also become a topic of interest. We define a model for formalizing the chaining of network functions using a context-free language. We process deployment requests and construct virtual network function graphs that can be mapped to the network. We describe the mapping as a Mixed Integer Quadratically Constrained Program (MIQCP) for finding the placement of the network functions and chaining them together considering the limited network resources and requirements of the functions. We have performed a Pareto set analysis to investigate the possible trade-offs between different optimization objectives.

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"
    - "distributed service function chaining"
    - "vehicular communications a network layer perspective"
    - "service function chaining resource allocation a survey"
    - "scalable steiner tree for multicast communications in software defined networking"

Connected through hyperedge HE-2 (induced by source paper "dynamic and application aware provisioning of chained virtual security network functions"):
  with members:
    - "impact of processing resource sharing on the placement of chained virtual network functions"
    - "performance comparison of intrusion detection systems and application of machine learning to snort system"
    - "optimal orchestration of virtual network functions"
    - "network function virtualization state of the art and research challenges"

Connected through hyperedge HE-3 (induced by source paper "impact of processing resource sharing on the placement of chained virtual network functions"):
  with members:
    - "dynamic and application aware provisioning of chained virtual security network functions"
    - "stringer balancing latency and resource usage in service function chain provisioning"
    - "online admission control and embedding of service chains"
    - "research directions in network service chaining"

Connected through hyperedge HE-4 (induced by source paper "optimum transmission delay for function computation in nfv based networks the role of network coding and redundant computing"):
  with members:
    - "polynomial codes an optimal design for high dimensional coded matrix multiplication"
    - "gradient coding from cyclic mds codes and expander graphs"
    - "coded computation against processing delays for virtualized cloud based channel decoding"
    - "coded fourier transform"
    - "a fundamental tradeoff between computation and communication in distributed computing"
    - "coded network function virtualization fault tolerance via in network coding"
    - "a scalable framework for wireless distributed computing"

Connected through hyperedge HE-5 (induced by source paper "exploring microservices for enhancing internet qos"):
  with members:
    - "optimal virtual network function placement in multi cloud service function chaining architecture"
    - "an nfv and microservice based architecture for on the fly component provisioning in content delivery networks"
    - "about microservices containers and their underestimated impact on network performance"
    - "circuit breakers discovery and api gateways in microservices"
    - "virtual machine placement literature review"
    - "migrating to cloud native architectures using microservices an experience report"

Connected through hyperedge HE-6 (induced by source paper "on service chaining strategies using virtual network functions in operator networks"):
  with members:
    - "a scalable approach for service chain mapping with multiple sc instances in a wide area network"
    - "optimal virtual network function placement in multi cloud service function chaining architecture"
    - "network function virtualization state of the art and research challenges"
    - "on orchestrating virtual network functions in nfv"
    - "research directions in network service chaining"
    - "resource allocation in a network based cloud computing environment design challenges"

Connected through hyperedge HE-7 (induced by source paper "np completeness and inapproximability of the virtual network embedding problem and its variants"):
  with members:
    - "fpt approximation algorithms for the virtual network embedding problem"
    - "virtual network embedding approximations leveraging randomized rounding"
    - "an approximation algorithm for path computation and function placement in sdns"
    - "competitive and deterministic embeddings of virtual networks"
    - "subgraph isomorphism in planar graphs and related problems"

Connected through hyperedge HE-8 (induced by source paper "virtual network embedding approximations leveraging randomized rounding"):
  with members:
    - "fpt approximation algorithms for the virtual network embedding problem"
    - "an approximation algorithm for path computation and function placement in sdns"
    - "service chain and virtual network embeddings approximations using randomized rounding"
    - "online admission control and embedding of service chains"

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)