Black Box LGB5028A, LGB5052A user manual Appendix a Glossary

Appendix A: Glossary

Achieving the required QoS becomes the secret to a successful end-to-end business solution. Therefore, QoS is the set of techniques to manage network resources.

RARP: RARP is an acronym for Reverse Address Resolution Protocol. It is a protocol that is used to obtain an IP address for a given hardware address, such as an Ethernet address. RARP is the complement of ARP.

RADIUS: RADIUS is an acronym for Remote Authentication Dial-In User Service. It is a networking protocol that provides centralized access, authorization and accounting management for people or computers to connect and use a network service.

RDI: RDI is an acronym for Remote Defect Indication. It is OAM functionallity that is used by a MEP to indicate a defect detected to the remote peer MEP.

RSTP: In 1998, the IEEE, with document 802.1w, introduced an evolution of STP: the Rapid Spanning Tree Protocol, which pro- vides for faster spanning tree convergence after a topology change. Standard IEEE 802.1D-2004 now incorporates RSTP and makes STP obsolete, while at the same time being backwards-compatible with STP.

SHA: SHA is an acronym for Secure Hash Algorithm. It designed by the National Security Agency (NSA) and published by the NIST as a U.S. Federal Information Processing Standard. Hash algorithms compute a fixed-length digital representation (known as a message digest) of an input data sequence (the message) of any length.

Shaper: A shaper can limit the bandwidth of transmitted frames. It is located after the ingress queues.

SMTP: SMTP is an acronym for Simple Mail Transfer Protocol. It is a text-based protocol that uses the Transmission Control Protocol (TCP) and provides a mail service modeled on the FTP file transfer service. SMTP transfers mail messages between systems and notifications regarding incoming mail.

SNAP: The SubNetwork Access Protocol (SNAP) is a mechanism for multiplexing more protocols than can be distinguished by the 8-bit 802.2 Service Access Point (SAP) fields on networks using IEEE 802.2 LLC. SNAP supports identifying protocols by Ethernet type field values; it also supports vendor-private protocol identifier.

SNMP: SNMP is an acronym for Simple Network Management Protocol. It is part of the Transmission Control Protocol/Internet Protocol (TCP/IP) protocol for network management. SNMP enables diverse network objects to participate in a network management architecture. It enables network management systems to learn network problems by receiving traps or change notices from network devices implementing SNMP.

SNTP: SNTP is an acronym for Simple Network Time Protocol, a network protocol for synchronizing the clocks of computer systems. SNTP uses UDP (datagrams) as transport layer.

SSID: Service Set Identifier is a name used to identify the particular 802.11 wireless LANs to which a user wants to attach. A client device will receive broadcast messages from all access points within range advertising their SSIDs, and can choose one to connect to based on pre-configuration, or by displaying a list of SSIDs in range and asking the user to select one.

SSH: SSH is an acronym for Secure SHell. It is a network protocol that allows data to be exchanged using a secure channel between two networked devices. The encryption used by SSH provides confidentiality and integrity of data over an insecure net- work. The goal of SSH was to replace the earlier rlogin, TELNET and RSH protocols, which did not provide strong authentication or guarantee confidentiality.

SSM: SSM In SyncE this is an abbreviation for Synchronization Status Message.

STP: Spanning Tree Protocol is an OSI Layer 2 protocol that ensures a loop-free topology for any bridged LAN. The original STP protocol is now made obsolete by RSTP.

SyncE: SyncE Is an abbreviation for Synchronous Ethernet. This functionality is used to make a network “clock frequency” synchronized. Not to be confused with real time clock synchronized (IEEE 1588).

TACACS+: TACACS+ is an acronym for Terminal Acess Controller Access Control System Plus. It is a networking protocol that provides access control for routers, network access servers, and other networked computing devices via one or more centralized servers. TACACS+ provides separate authentication, authorization, and accounting services.

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