The IT world is SO full of acronyms and the list is growing and changing all the time as new technologies come in and old technologies disappear.
Here are some of the current acronyms from the Carrier/Telco perspective: ATM: Asynchronous Transfer Mode b/s: Bits per second CE: Carrier Ethernet CEN: Carrier Ethernet Network. A network that supports MEF services CCM: Continuity Check Message CIR: Committed Information Rate CoS: Class of Service CRC: Cyclical Redundancy Check CSMA/CD: Carrier sense, multiple access/collision detection DA: Destination Address DEI: Discard Eligibility Indicator EIR: Excess Information Rate EVPL: Ethernet Virtual Private Line service EMS: Element Management System ENNI: External Network-to-Network Interface EPL: Ethernet Private Line EVC: Ethernet Virtual Connection FC: Fibre Channel FDV: Frame Delay Variation (commonly “jitter”) FIB: Forwarding Information Base FLR: Frame Loss Ratio G.709: ITU-T recommendation for interfaces for the Optical Transport Network GbE: Gigabit Ethernet (10 GbE = ten gigabit Ethernet, 100 GbE = hundred Gigabit Ethernet) Gb/s: Gigabits per second GFP: Generic Framing Procedure IEEE: Institute of Electrical and Electronics Engineers IETF: Internet Engineering Task Force IP: Internet Protocol ITU-T: International Telecommunications Union – Telecommunication Standardization Bureau LACP: Link Aggregation Protocol LAN: Local Area Network LBM: Loopback Message LSP: Label Switched Path LTM: Linked Trace Message MAC: Media Access Control MAN: Metropolitan Area Network Mb/s: Megabits per second MEF: Formerly “Metro Ethernet Forum” and today known as simply “MEF”; organization that originated the Carrier Ethernet trend and established its service specifications MPLS: Multi-Protocol Label Switching NFV: Network Functions Virtualization NMS: Network Management System OAM: Operations, Administration, and Maintenance OC-n: Optical Carrier Level n (1, 3, 12, 48, 192, 768) ODU: Optical Data Unit Operator: The entity that administers a Carrier Ethernet network ODU: Optical Data Unit OTN: Optical Transport Networking (see G.709) OVC: Operator Virtual Connection P2P: Point-to-Point PBB: Provider Backbone Bridging PCP: Priority Code Point PDU: Protocol Data Unit PHY: Physical QoS: Quality of service RFC: Request for Comment: IETF’s designation for a standard RFP: Request for Proposal SA: Source Address SDH: Synchronous Digital Hierarchy SDN: Software-Defined Network SLA: Service-Level Agreement SONET: Synchronous Optical Network STP: Spanning Tree Protocol Tb/s: Terabits per second TDM: Time-Division Multiplexing TWAMP: Two Way Active Measurement Protocol UNI: User Network Interface VLAN: Virtual Local Area Network VoIP: Voice over IP WAN: Wide Area Network