3Com NBX 100 Administrator's Manual - page 374
374
C
HAPTER
16: N
ETWORK
M
ANAGEMENT
Terminology and
Acronyms
Make sure you are familiar with the following terminology and acronyms,
which are commonly used when discussing SNMP operations.
SNMP Managers
and Agents
An agent using network elements stores network information about itself
in a Management Information Base (MIB). MIBs specify the variables that
network elements maintain. For example, a variable can contain the data
that records when you last booted the system.
SNMP managers are network hosts that use SNMP software to poll the
network devices and receive the information stored in them.
■
Managers use UDP port 161 by default to send requests to the agent
■
Agents use UDP port 162 by default to send replies or messages to the
manager.
Table 67 SNMP Terminology and Acronyms
Item
Detail
Authentication
Process of ensuring data origin authenticity, specifically that
the identity of the user is genuine. Also incorporates data
integrity checks, to ensure data has not been altered or
destroyed in an unauthorized manner.
CBC
Cipher-Block-Chaining (a method of encoding data
encryptions in a message).
HMAC
Keyed-Hash Message Authentication Code. Provides message
authentication through the use of cryptographic hash
functions.
Inform
Reliable notification of an SNMPv3 event.
Key
A value that is used to ensure authenticity or privacy, without
which it is almost impossible to masquerade or eavesdrop.
MD5
Message Digest type 5 (a type of hashing function).
Notification
SNMPv3 event.
Privacy
The hiding of data from eavesdroppers.
SHA
Secure Hashing Function (a type of hashing function).
Trap
SNMPv1 message notifying the manager of a system event.
USM
User-based Security Model.
VACM
View-based Access Control Model.
MIB
Management Information Base.