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User Manual for the NETGEAR 7200 Series Layer 2 Managed Switch Software
Glossary B-15
202-10010-01
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 defining 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 defining 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.
SMII
Serial Media Independent Interface.
SNMP
See “Simple Network Management Protocol” on page 14.
Spanning Tree
A technique that detects loops in a network and logically blocks the redundant paths, ensuring that only one
route exists between any two LANs.
Spanning Tree Protocol (STP)
A protocol that finds the most efficient path between segments of a multi-looped, bridged network. STP
allows redundant switches and bridges to be used for network resilience, without the broadcast storms
associated with looping. If a switch or bridge falls, a new path to a redundant switch or bridge is opened.
SRAM
Static Random Access Memory.