CINXE.COM

<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="120"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "publications.waset.org",cType: 'non-interactive',cRay: '9135497b5f71fd1a',cH: 'wudxJEZPv0zKONYCd2pmk0m3N6fvml2XuJAtLKG0x1s-1739790166-1.2.1.1-mXk02N0QlT3V97P9pyUG9mom2LqqdMEBQdZL1qnLuDGjck2yqp2oC3USL5y_142g',cUPMDTk: "\/abstracts\/search?q=network%20service&__cf_chl_tk=atx31Lba6wxC3lyVMgKXhFMba8mD69EKOMju9XpwZdU-1739790166-1.0.1.1-e7XJktbUgA4PTR6cW5G1BPl0t17p5ruUwUDIuNCFH5s",cFPWv: 'b',cITimeS: '1739790166',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=network%20service&__cf_chl_f_tk=atx31Lba6wxC3lyVMgKXhFMba8mD69EKOMju9XpwZdU-1739790166-1.0.1.1-e7XJktbUgA4PTR6cW5G1BPl0t17p5ruUwUDIuNCFH5s",md: "VYjAtT3SpOl7wTc4.oyLrj2iKPLxP755l3GDZdfavDE-1739790166-1.2.1.1-J94rLfmVpKk5Wkvd6eBenuWD3.yB9XbDM7wn.DqCxRkZgKkbB4A3FognmgwFc9S13Fd1nALwrjfYoMMYmIIAVf1LXKNf5MSUn7PeoPxGRIe1JQXrpGfpcuVlYJt9Pq_LWpyl78S5BJYdUiNuVdcYMlL04n5jBc_BcuX3FwZC5gRy5GIBnaGtRrFPLJKZbeEzZZf8o.i1wcgtFxPKgN_wna_72FMbmgW3IVpCOAEXRTtEbJhE.K0VvTm54WzFYVNT7qo3Zz18KcTVjhMJierptjnrjA.exZP4QPpoAHZGnrK7BbV87iTVT6GutxJBCdQM1cBOBYhEDaNd0RSUbFtm95WUCJ0JawWBjZPi8BDY3vmDCt_Rlw_EQBTbY0mkaRDLwgNF06LqlDmYLgo6WL8D3AmIphZNlDyspuj9l1rs1jtJbaroJLOLYOJLGR3HlwyX6X5h4FTaGNHmg0inHzWyy7zYWBQ3sSr0Zc8yDkGZj2lXEmwKqK8IM5Nk0W7dZ9r.P9MNIM6i_EsSdlVq.HBHpE2Da9RlQp9fjLIAV7VJcp4dfHieFGHDkPeiWWYYbxvY_PuMHmkf0Z3ss7GslJnhgzPU0dzRiYCjdjOwxcz_9XEMVeyTzx4RJ7wtuj3qNMnL2_ELH9oDUAcmbBXvkyTFYtOAOdjPTVSJz1rRn0__ogxPxSVciDUou2aLQMfZWo2LNbYR5QiOqgz0zF3xPjoQACTQgzjY.oGWoikNuESChyWZn75j0Yj92nn2jr2kl6TuKvKuG0jdTrSKbPZOx2FuF_W2sVu8Y7aav_FjlUW4T9ukZdpJOrF0TbCNFUwuoa2jRXYpudiSbev4VmJgR6vY0ZrEwxXd2RIAospfZKZuxAzK5RF1DOaxeIQ2EWFGkwQ8OnawvScLf98wqKBHz4FNFSAVUECpdzxktg.zRSOSjtkCMLued8OL09DnPW8DoT8txBvlP0NkxapcVog5_wNA_ak2ms83agL_o4SwMIdjNXNAquTpr0.yzwAmkrTmhBy8xKo.numPTM0ILe19yPOm3JBXM9WajXbR3blrylkRmnFrE1.chjW_i9zNH_5nCaYpcDkKPbPU6I3jj6YoIhBhYJA2bCcYtvXI8UDxu4aNZXTKa_OA_z06GmgCLkb_UUtpYj1hhjmQ_Mly1Sq21.oexSNfh1r6fH85LgUolWcg7BHwJdB22GNArHmnXo3kfALTtKtYumsOTtQNfyeOULK13jGnVqJk3yeDL6LqhMB_m_KttI9GL6khOssEL.y3BqfaS3guQ2N5CWCpBob_r3.XWRwZVlwrUAqio.NLSLT_O3w1x91lcnVjdtEzPocHKLgEIvhXmEQA_07WLHdUid5aU21coDSr7_2MPjRwMQbU61QGaRQ9bpMvP44Sk60ZzQCN.iiO_a4WRCt2iVF8im19LRWF1P0C3eNB2PX6j_UhymSkCaE70ndbF82k8XmRLlAce7onWStoqZvGpB75jh76DJirlLWMpRhfqt1lotICiEAB4GofdOh0bRagPtITqCftha4cngLTB7JqIcTm3q9uAkCzocgkou3OlamrSbfyAGubv_SSbXJOZimCN73r2FaNbe1MHmlq6shqb88BrveoxLcs5lNxIugWLKaycbgTr35ZhJRc0inmDihGK17vmN4jQRviJjbj57cCrqGYgWxWFoL6vxezf27IbtfypiES5q.pHKK1NnjUVPyV.9PRsskKq6NpRyvelkNZ0oMZ5lWAw7TLQHUEwByKTcKECMeiFwqD2Ljg5Xnv0TfE6W24pgtOfcn1wYpymvwkD9.EJiaXVQKaxLJo4DuWCVvSMwxXRL5wt52jYBzQT2ht4dEx1hkJeJ5_DDYTviT4.Hz2zV5Z5rCcjAdC5j8eHJ0zHNm5XUkISfyFYjhBxkDIJqjOvEBui2M_OQopzXwfOpDJ3y_aOWpDjOS1XrpMMDFlnUAq9dI",mdrd: "dI6BtIQZEsFqdfd6hlPEiICgxtPCCyGRKb7jOwhbNkA-1739790166-1.2.1.1-bfgEYYC_Sg3fz3hO1GFUNhSgR2TDOZvUeBFXvfEm4nyeRiImM.Q.YBuW7kt.aKCIUCVWdceINka16WxKvrMlzzhJCC2kMG8jINIXGGHQ2zpipn9S59bDVJGA2db7j_8L3aqfGQE2s7e.qeapZQMD_ZHF14GTs8PKlpD5lJumbpjmaRj4l.Y11adb9eqXqdfj3MFvALlSbagDQ6jSSR2YGGT6SOKM8SjbeRNcJ7nKwHf.sAqI4MnX9rPY0ImueV3bYFotA6xxjEqGaFwP5b5dH_Va1mEA8DPhcJ2v0.JP.RU4Bt928LzeOZE87QuFWiVrbKsTHqOrf8QWHMr66R7mxaf5XWpBUAkHIo6tPP4hntwXsFgktuV.egwiRs4r.462RLqpSbnQifNslevk5d1OXDzYU9cHHEkTOaH1AtNAz78SGGftMULZbVkPjKeCsoBKiRxR1PWjfUYoXuwGjL.tMLZKsSsjn4xbeRQuQE47_UmLVWYTNJP5t0nPtXSJHOftg0xa8IudifqzbErnda8zCXPos7boUVLV1WvkXXLIQPINBdONXccTWr53h2n8zWP14ZqNp65kYJf29j6anjHiswhK71UbXpuYoIr0cMnvUlESKeLwYvYrShuhJXfeogWaAvjWmzPTI3YSUetCRnugXPFosf68VAiYqiZesAMkKDS3XQxDU4ZqDghL9OD2Mp4Zwene96HUHH_HU69O0OcYC_k5OWZZmd8Dvj7GQLk7HvfUK62nzIMpateqa.YbE3_O.Y5CmM53htFVkdb2QzblP_8pYIJ3_1UddMzWl3.ie4lL3b8SUjTrygSNgFqCcIHPpLFMrXOGc12Fqkf.rNXi2CikA0BJSQDCRddU8cD_tHzA7EA7br5.s8iBEjizTyZk4aI24X_qIlGNsgu7WQtAmR_79JRCQrn0cT3e.g3NTT4lK3pim0ODS1aKMA2xbZtXl6IMipMx_QzTgxGvHwCm1SSpy8d2WAx9oI.3hFKCjaQHxaX8ju1ij_mLI3iBniUdMrw0_jQxQYFrRIsmWtMwBQjfoykBDKQMuaVBQRzZsk23VoSnT_L.OmAPkmn9IQfHyOBr0YicIyBbvowmyDMxU7gzvMFdTe_7YtXNjpjF1TnCydWl84IoXsOsXbwUbfNKPVD4PZtDqtbeqFxfaS23x_szUFJqnya2oPlgKRmVKsrRHI9edmwgZWjTI16pRW1rtaD.lQOAJJ6qlUBCFllG.iVx33Q9urF74eo9bKmTCPIYLjvk6318Ei5_pTmKTKOVaiFr.bbMsXli1pc8qXZy.qZ6KQIrNe4Yn4DoijHyG6wwJV8LHIZ29ZfrzYC__ItsH_xYktUbMlm8JYgPLL.Uz8CnC8VjAq5PgBmEr8cAXiM.ANOMNn7OHLfNHpUxc8EI7Qnr24MQnRsTMeRXYVSEH_enmacn0wAFOvt6AgPz3Y.72Kg3Xvu1vQboTu3E_eWaBN2r58n9GhLNw1VE3zI1zHwgRvXkEK6Jjw5qu9jkJcQYwC2NHiemFEGFnd1b3HphzTmKqXpWhKBhRnFSV.yepnxs0LDBBIpU_qE9y8604xBsoY556rNT4XffmsqMpkK4Hbvrq5rLBEnKWs0MPJm5l3r9XrLlMed729Arse9i8duoM.4EIhd0SXG1VFHiZ3M_rrq2.G.tnm_mGmhzr_Fx.2BB4.axjWb8TMtfUP2JS2DlRfMp7zLOnx.T_Ic1zE3nyeqJ6OItGnppK1NmhrmW9upNC3e38Eiw_MNZwJE6da3kX2skEc28CWJ7lynnjf6g7.Lpw2h03frK2s9Os.WV7r40ozcSgGmtK_iFLqVxTuW0kzp.lUAwNiNvxDT1iPJMGdSukM5.4eFMbTBjX0OWpfHGM8z1ZXoXl_2BhGCBqa9ZSUUfaVlgMig3z1E3zcXwoTBZtQZgjWi.5P2sZ7Hhobvvq3x_ivIzmvoR5iNNaZUZXqBPB62jPg0CE9zwoYE5"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9135497b5f71fd1a';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/abstracts\/search?q=network%20service&__cf_chl_rt_tk=atx31Lba6wxC3lyVMgKXhFMba8mD69EKOMju9XpwZdU-1739790166-1.0.1.1-e7XJktbUgA4PTR6cW5G1BPl0t17p5ruUwUDIuNCFH5s" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>