Introduction A management system contains: several (potentially many) nodes@ each with a processing entity@ termed an agent@ which has access to management instrumentation; at least one management station; and@ a management protocol@ used to convey management information between the agents and management stations. Operations of the protocol are carried out under an administrative framework which defines authentication@ authorization@ access control@ and privacy policies. Management stations execute management applications which monitor and control managed elements. Managed elements are devices such as hosts@ routers@ terminal servers@ etc.@ which are monitored and controlled via access to their management information. Management information is viewed as a collection of managed objects@ residing in a virtual information store@ termed the Management Information Base (MIB). Collections of related objects are defined in MIB modules. These modules are written using a subset of OSI's Abstract Syntax Notation One (ASN.1) [1]@ termed the Structure of Management Information (SMI) [2]. This document is the MIB module which defines managed objects for managing implementations of the Transmission Control Protocol (TCP) [3] . The managed objects in this MIB module were originally defined using the SNMPv1 framework as a part of MIB-II [4]. This document defines the same objects for TCP using the SNMPv2 framework.