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: "tcp selective acknowledgments and ubr drop policies to improve atm ubr performance over terrestrial and satellite networks"
  Abstract: We study the performance of Selective Acknowledgments with TCP over the ATM-UBR service category. We examine various UBR drop policies, TCP mechanisms and network configurations to recommend optimal parameters for TCP over UBR. We discuss various TCP congestion control mechanisms compare their performance for LAN and WAN networks. We describe the effect of satellite delays on TCP performance over UBR and present simulation results for LAN, WAN and satellite networks. SACK TCP improves the performance of TCP over UBR, especially for large delay networks. Intelligent drop policies at the switches are an important factor for good performance in local area networks.

Connected through hyperedge HE-1 (induced by source paper "the erica switch algorithm for abr traffic management in atm networks"):
  with members:
    - "congestion avoidance in computer networks with a connectionless network layer part i concepts goals and methodology"
    - "congestion control and traffic management in atm networks recent advances and a survey"
    - "feedback consolidation algorithms for abr point to multipoint connections in atm networks"
    - "the osu scheme for congestion avoidance in atm networks lessons learnt and extensions"
    - "congestion control with explicit rate indication"
    - "performance of tcp over abr on atm backbone and with various vbr traffic patterns"
    - "design and analysis of queue control functions for explicit rate switch schemes"
    - "source behavior for atm abr traffic management an explanation"

Connected through hyperedge HE-2 (induced by source paper "analysis and simulation of delay and buffer requirements of satellite atm networks for tcp ip traffic"):
  with members:
    - "the erica switch algorithm for abr traffic management in atm networks"
    - "satellite atm network architectural considerations and tcp ip performance"
    - "performance and buffering requirements of internet protocols over atm abr and ubr services"

Connected through hyperedge HE-3 (induced by source paper "providing rate guarantees to tcp over the atm gfr service"):
  with members:
    - "satellite atm network architectural considerations and tcp ip performance"
    - "ubr improving performance of tcp over atm ubr service"

Connected through hyperedge HE-4 (induced by source paper "design issues for providing minimum rate guarantees to the atm unspecified bit rate service"):
  with members:
    - "ubr improving performance of tcp over atm ubr service"

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)