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: "research directions in network service chaining"
  Abstract: Network Service Chaining (NSC) is a service deployment concept that promises increased flexibility and cost efficiency for future carrier networks. NSC has received considerable attention in the standardization and research communities lately. However, NSC is largely undefined in the peer-reviewed literature. In fact, a literature review reveals that the role of NSC enabling technologies is up for discussion, and so are the key research challenges lying ahead. This paper addresses these topics by motivating our research interest towards advanced dynamic NSC and detailing the main aspects to be considered in the context of carrier-grade telecommunication networks. We present design considerations and system requirements alongside use cases that illustrate the advantages of adopting NSC. We detail prominent research challenges during the typical lifecycle of a network service chain in an operational telecommunications network, including service chain description, programming, deployment, and debugging, and summarize our security considerations. We conclude this paper with an outlook on future work in this area.

Connected through hyperedge HE-1 (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"
    - "specifying and placing chains of virtual network functions"

Connected through hyperedge HE-2 (induced by source paper "iot virtualization a survey of software definition function virtualization techniques for internet of things"):
  with members:
    - "network function virtualization state of the art and research challenges"
    - "wireless sensor network virtualization a survey"
    - "publish subscribe enabled software defined networking for efficient and scalable iot communications"
    - "a system architecture for software defined industrial internet of things"

Connected through hyperedge HE-3 (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"
    - "specifying and placing chains of virtual network functions"
    - "resource allocation in a network based cloud computing environment design challenges"

Connected through hyperedge HE-4 (induced by source paper "on non preemptive vm scheduling in the cloud"):
  with members:
    - "scheduling storms and streams in the cloud"
    - "randomized scheduling algorithm for queueing networks"

Connected through hyperedge HE-5 (induced by source paper "edgechain blockchain based multi vendor mobile edge application placement"):
  with members:
    - "cloud fog computing resource management and pricing for blockchain networks"

Connected through hyperedge HE-6 (induced by source paper "optimal virtual network function placement in multi cloud service function chaining architecture"):
  with members:
    - "network function virtualization state of the art and research challenges"
    - "software defined networking a comprehensive survey"
    - "specifying and placing chains of virtual network functions"
    - "resource allocation in a network based cloud computing environment design challenges"

Connected through hyperedge HE-7 (induced by source paper "service provider devops"):
  with members:
    - "final service provider devops concept and evaluation"
    - "network function virtualization state of the art and research challenges"
    - "verifying isolation properties in the presence of middleboxes"

Connected through hyperedge HE-8 (induced by source paper "wnetkat a weighted sdn programming and verification language"):
  with members:
    - "online admission control and embedding of service chains"
    - "merlin a language for provisioning network resources"

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)