User manual

LOSSARY

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ES-2000 Series

RSTP Rapid Spanning Tree Protocol. RSTP reduces the convergence time for

network topology changes to about 10% of that required by the older IEEE

802.1D STP standard.

SNMP Simple Network Management Protocol. The application protocol in the

Internet suite of protocols which offers network management services.

SNTP Simple Network Time Protocol allows a device to set its internal clock based on

periodic updates from a Network Time Protocol (NTP) server. Updates can

be requested from a specific NTP server, or can be received via broadcasts

sent by NTP servers.

STA Spanning Tree Algorithm is a technology that checks your network for any

loops. A loop can often occur in complicated or backup linked network

systems. Spanning Tree detects and directs data along the shortest

available path, maximizing the performance and efficiency of the network.

TACACS+ Terminal Access Controller Access Control System Plus. TACACS+ is a logon

authentication protocol that uses software running on a central server to

control access to TACACS-compliant devices on the network.

TCP/IP Transmission Control Protocol/Internet Protocol. Protocol suite that

includes TCP as the primary transport protocol, and IP as the network layer

protocol.

UDP User Datagram Protocol. UDP provides a datagram mode for packet-

switched communications. It uses IP as the underlying transport

mechanism to provide access to IP-like services. UDP packets are delivered

just like IP packets – connection-less datagrams that may be discarded

before reaching their targets. UDP is useful when TCP would be too

complex, too slow, or just unnecessary.

UTC Universal Time Coordinate. UTC is a time scale that couples Greenwich

Mean Time (based solely on the Earth’s rotation rate) with highly accurate

atomic time. The UTC does not have daylight saving time.

VLAN Virtual LAN. A Virtual LAN is a collection of network nodes that share the

same collision domain regardless of their physical location or connection

point in the network. A VLAN serves as a logical workgroup with no

physical barriers, and allows users to share information and resources as

though located on the same LAN.