【正文】 中心 Network Information CentreNIM 網(wǎng)絡(luò)接口模塊 Network Interface ModuleNISDN 窄帶ISDN Narrowband Integrited Services Digital NetworkNLAM 網(wǎng)絡(luò)層地址管理NNI 網(wǎng)絡(luò)網(wǎng)絡(luò)接口 NetworkNetwork InterfaceNOMS 網(wǎng)絡(luò)營運(yùn)與管理專題討論會 Network Operation and Management SymposiumNREN (美國)國家研究和教育網(wǎng) National Research and Education NetworkNSAP 網(wǎng)絡(luò)服務(wù)接入點(diǎn) Network Service Access PointNSF （美國）國會科學(xué)基金會NVRAM Nonvolatile RAMNVT 網(wǎng)絡(luò)虛擬終端 Network Virtual TerminalOOAM 操作與維護(hù) Operation And MaintenanceODBC 開放數(shù)據(jù)庫互連 Open Database ConnectionORB 對象請求代理 Object REquest BrokerOSF 開放軟件基金會 Open Software FundationOSI 開放系統(tǒng)互聯(lián) Open System InterconnectionOSPF 開放最短路徑優(yōu)先(協(xié)議) Open Shortest Path FirstPPBX 用戶交換機(jī) Private Branch eXchangePCM 脈沖編碼調(diào)制 Pulse Code ModulationPCN 個人通信網(wǎng)絡(luò) Personal Communications NetworkPCR 峰值信元速率 Peak Cell RatePCS 個人通信服務(wù) Personal Communications ServicePDH 準(zhǔn)同步數(shù)字系列PDA 個人數(shù)字助理 Personal Digital AssistantPDN 公用數(shù)據(jù)網(wǎng) Public Data NetworkPDU 協(xié)議數(shù)據(jù)單元 Protocol Data UnitPER 分組差錯率 packet error ratePEM Port Expansion ModulePIR 分組插入率 packet insertion ratePI/SO Primary In/Secondary OutPLCP 物理層會聚協(xié)議 Physical Layer Convergence ProtocolPLR 分組丟失率 packet loss ratePMD 物理媒體相關(guān)（子層） Physical Medium DependentPOH 通道開銷PON 無源光纖網(wǎng)POP Post Office ProtocolPO/SI Primary Out/Secondary InPOTS 普通老式電話業(yè)務(wù) Plain Old Telephone ServicePPD 部分舍棄分組數(shù)據(jù)包 Partial Packet DiscardPPP 點(diǎn)到點(diǎn)協(xié)議 Point to Point ProtocolPPTP 點(diǎn)對點(diǎn)隧道協(xié)議PRM 每分鐘可打印輸出的頁數(shù) Page Per MinutePRM 協(xié)議參考模型 Protocol Reference ModelPRN 分組無線網(wǎng) Packet Radio NetworkPSN 分組交換節(jié)點(diǎn) Packet Switch NodePSDN 分組交換數(shù)據(jù)網(wǎng)PSTN 公用電話交換網(wǎng) Public Switched Telephone NetworkPVC 永久虛電路（包括PVPC和PVCC） Permanent Virtual CircuitPVPC permanent virtual path connectionPVCC permanent virtual channel connectionPVP 永久虛路徑 Permanent Virtual PathoS 服務(wù)質(zhì)量 Quality of ServiceRRADIUS 遠(yuǎn)端授權(quán)撥號上網(wǎng)用戶服務(wù)RARP 逆向地址解析協(xié)議 Reverse Address Resolution ProtocolRAS 遠(yuǎn)程訪問服務(wù)器RFC 請求評注 Request for CommentsRFT Request for TechnologyRIP Routing Information ProtocolRMON 遠(yuǎn)程網(wǎng)絡(luò)管理Router 路由器RPC 遠(yuǎn)程過程調(diào)用 Remote Procedure CallRSVP 資源重復(fù)利用協(xié)議RTMP Routing Table Maintenance Protocol(用于Appletalk)RTP 接收和發(fā)送端口RTS 往返樣本 Round Trip SampleRTS 剩余時間標(biāo)簽SSAP 業(yè)務(wù)接入點(diǎn) Service Access PointSAP 服務(wù)公告協(xié)議 Service Advertising ProtocolSAR 分段和重組(子層) Segmentation and ReassemblySAS Single Attached StationSC Stick and Click connectorSCR 信號串?dāng)_比SCR 持續(xù)信元速率 Sustained Cell RateSCS 交換控制軟件SDH 同步數(shù)字系列 Synchronous Digital HierarchySDLC 同步數(shù)據(jù)鏈路控制(協(xié)議) Advanced Data Communication Control ProcedureSDTV 標(biāo)準(zhǔn)數(shù)字電視SDU 業(yè)務(wù)數(shù)據(jù)單元 Service Data UnitSIPP 增強(qiáng)的簡單因特網(wǎng)協(xié)議 Simple Internet Protocol PlusSLIP 串行線路IP Serial Line Interface ProtocolSMDS 交換式多兆比特數(shù)據(jù)業(yè)務(wù) Switched Multimegabit Data ServicesSMF 單模光纖 Singlemode FiberSMI Structure of Management Information（MIB的結(jié)構(gòu)）SMT 站點(diǎn)管理 Station ManagementSMTP 簡單郵件傳輸協(xié)議 Simple Mail Transfer ProtocolSNA 系統(tǒng)網(wǎng)絡(luò)體系結(jié)構(gòu) System Network ArchitectureSNMP 簡單網(wǎng)絡(luò)管理協(xié)議 Simple Network Management ProtocolSNR 信噪比 SignalNoise ratioSOH 段開銷SONET 同步光纖網(wǎng)絡(luò) Synchronous Optical NetworkSPE 同步凈荷包 Synchronous Payload EnvelopeSPP 定序分組協(xié)議（XNS中，相當(dāng)于TCP） Sequential Packet ProtocolSRTS 同步剩余時間標(biāo)簽法SSCS 業(yè)務(wù)特定部分會聚子層SSI 服務(wù)器端包含 Server Side IncludeST Stick and Turn connectorSTM 同步傳輸方式 Synchronous Transfer ModeSTP 屏蔽雙絞線 Shielded Twisted PairSTS 同步傳輸信號 Synchronous Transport SignalSVC 交換虛電路 Switched Virtual CircuitSwitch 交換機(jī)TTAC Technical Assistance CenterTAST 時間分配話音插空技術(shù) Time Assignment by Speech InterpolationTC 傳輸匯集(子層) Transmission ConvergenceTCP 傳輸控制協(xié)議 Transmission Control ProtocolTDM 時分多路復(fù)用 Time Division MultiplexingTFTP 單純文件傳輸協(xié)議 Trivial File Transfer protocolTIP 終端接口處理機(jī) Terminal Interface ProcessorTP 雙絞線 Twisted PairTSAP 傳輸層服務(wù)訪問點(diǎn) Transport Service Access PointTTL 生存時間 Time To LiveTTR 定時令牌旋轉(zhuǎn)UUBR 未定義比特率 Undefined Bit RateUEM 通用以太網(wǎng)模塊 Universal Ethernet ModuleUDP 用戶數(shù)據(jù)報協(xié)議 User Datagram ProtocolUI Unix國際UNI 用戶網(wǎng)絡(luò)接口 UserNetwork InterfaceUPC 使用參數(shù)控制 Usage Parameter ControlURL 統(tǒng)一資源定位 Universal Resource LocatorU** 通用串行總線 Universal Serial BusUTP 非屏蔽雙絞線 Unshielded Twisted PairUUCP Unix to Unix Copy ProgramVVAN 增值網(wǎng) value Added NetworkVBR 可變比特率 Variable Bit RateVCC 虛信道連接 Virtual Channel ConnectionVCI virtual channel identifierVD 向量距離（算法）又叫BellmanFord算法） vectordistanceVLAN Virtual LANVLSI 超大規(guī)模集成電路VOD 點(diǎn)播圖像 Video on DemandVPC 虛路徑連接 Virtual Path ConnectionVPI 虛路徑標(biāo)識 virtual path identifierVPN 虛擬專用網(wǎng)絡(luò) Virtual Private NetworkVRML 虛擬現(xiàn)實(shí)造型語言 Virtual Reality Modeling LanguageVTP 虛擬隧道協(xié)議WWAN 廣域網(wǎng) Wide Area NetworkWDM 波分多路復(fù)用 Wavelength Division MultiplexingWDMA 波分多路訪問 Wavelength Division Multiple AccessWRB Web請求代理 Web Request BrokerWWW 萬維網(wǎng) World Wide WebXXNS Xerox Network System50 / 50