Network Critical SmartNA-X User Manual page 225

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LOSSARY
maintaining and distributing switch-specific passwords to all users. For accounting, this can help you track
network resource usage.
security level
A type of security algorithm performed on each SNMP packet. The three levels are: noauth, auth, and priv.
noauth authenticates a packet by a string match of the user name. auth authenticates a packet by using either the
MD5 or SHA algorithms. priv authenticates a packet by using either the MD5 or SHA algorithms and encrypts
the packet using the DES or AES algorithm. For SNMP V1/V2 it's noauth, but with V3 you have the options
to have to specify authentication and privacy options.
security model
The security strategy used by the SNMP agent. Currently, three security models are supported by Network
Critical: SNMPv1, SNMPv2c, and USM (User-based Security Model).
security name
A term used in VACM sectogroup command. It could be SNMP user name created using 'snmp user' command
for SNMPV3 or security name created using snmp comtosec command for SNMPV1 and SNMPV2.
SNMP
Simple Network Management Protocol (SNMP) is an Internet-standard protocol for managing devices on IP
networks. It is used mostly in network management systems to monitor network-attached devices for conditions
that warrant administrative attention. SNMP is a component of the Internet Protocol Suite as defined by the
Internet Engineering Task Force (IETF). It consists of a set of standards for network management, including an
application layer protocol, a database schema, and a set of data objects.
SNMP exposes management data in the form of variables on the managed systems, which describe the system
configuration. These variables can then be queried and set by managing applications.
SNMP agent
An agent is a network-management software module that resides on a managed device. An agent has local
knowledge of management information and translates that information to or from an SNMP specific form.
SNMP engine
A copy of SNMP that can either reside on the local or remote device. Each SNMP engine is uniquely identified
by an engineId.
SNMP group
A group is a set of zero or more <securityModel, securityName> tuples on whose behalf SNMP management
objects can be accessed. A group defines the access rights afforded to all securityNames which belong to that
group. The combination of a securityModel and a securityName maps to at most one group. A group is
identified by a groupName. The View-based Access Control Model uses the securityModel and the
securityName as inputs to the Access Control module when called to check for access rights. It determines the
groupName as a function of securityModel and securityName.
SNMP manager
In typical SNMP uses, one or more administrative computers, called managers, have the task of monitoring or
managing (configuring) a group of devices on a network. Each managed system executes, at all times, a software
component called an agent which reports information via SNMP to the manager.
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