Digitus DN-80233, Руководство пользователя

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RPU.
Remote Power Unit.
RSVP.
See “Resource Reservation Setup Protocol” on page 300.
RTOS.
See “Real-Time Operating System” on page 300.
S
SDL.
Synchronous Data Link.
Simple Network Management Protocol.
SNMP is the protocol governing network management and the
monitoring of network devices and their functions. It is not necessarily limited to TCP/IP networks. The
versions have the following differences:
SNMPv1
(full): Security is based on community strings.
SNMPsec
(historic): Security is based on parties. Few, if any, vendors implemented this version of the
protocol, which is now largely forgotten.
SNMPv2p
(historic): For this version, much work was done to update the SNMPv1 protocol and the
SMIv1, and not just security. The result was updated protocol operations, new protocol operations and
data types, and party-based security from SNMPsec.
SNMPv2c
(experimental): This version of the protocol is called community string-based SNMPv2. It is an
update of the protocol operations and data types of SNMPv2p, and uses community-based security from
SNMPv1.
SNMPv2u
(experimental): This version of the protocol uses the protocol operations and data types of
SNMPv2c and security based on users.
SNMPv2*
(experimental): This version combined the best features of SNMPv2p and SNMPv2u. (It is also
called SNMPv2star.) The documents defing this version were never published as RFCs.
SNMPv3
(proposed): This version of the protocol is a combination of user-based security and the protocol
operations and data types from SNMPv2p and support for proxies. The security is based on that found in
SNMPv2u and SNMPv2*, and updated after much review. The documents defing this protocol will soon
be published as RFCs.
SimpleX signaling.
SX is one of IEEE 802.3's designations for media. For example, 1000SX indicates
1000 gigabit Ethernet over "short haul" or "short wavelength" optical fiber.
SMC1.
A model of Serial Management Controller from Motorola.
SMII.
Serial Media Independent Interface.
SNMP.
See “Simple Network Management Protocol” on page 301.
SODIMM.
Small Outline Dual Inline Memory Module.
SRAM.
Static Random Access Memory.
STP.
Spanning Tree Protocol. See “802.1D” on page 294 for more information.
stub area.
OSPF area that carries a default route, intra-area routes, and interarea routes, but does not
carry external routes. Virtual links cannot be configured across a stub area, and they cannot contain an
ASBR. Compare with non-stub area. See also ASAM and OSPF.
SVL.
Most switches support Independent learning, wherein traffic from one VLAN will
not be forwarded to another VLAN. Hence if some limited form of forwarding needs to
be supported, the switch should implement Shared VLAN learning.
SX.
See “SimpleX signaling” on page 301.
SYSAPI.
See “Systems Application Programming Interface” on page 301.