User guide
Odyssey Access Client User Guide
118
T
TACACS+—An enhanced version of Terminal Access Controller Access Control
System. TACACS+ is TCP based authentication and access control Internet protocol
governed by RFC 1492.
TCP—Abbreviation for Transmission Control Protocol. Verifies correct delivery of
data from client to server; uses virtual circuit routing. Occupies layer 4 of the OSI
reference model.
TCP/IP—Abbreviation for Transmission Control Protocol/Internet Protocol.
Token—This is hardware or software based system for authentication wherein two
or more sets of matched devices or software generate matching random passwords
with a high degree of complexity.
Transport Layer Security (TLS)—An end-to-end encryption protocol originally
specified in ISO standard 10736 that provides security services as part of the
transport layer in a protocol stack. TLS refers to an Internet protocol defined also in
RFC 2246. TLS is based on and similar to SSL v3.0, it is really misnamed because it
operates at the application layer not the transport layer.
Tunnel—A secure virtual connection through the Internet.
U
Unified Access Control (UAC)—An IP-based enterprise infrastructure that
coordinates network, application, and endpoint intelligence and provides the
control required to support network applications, manage network use, and reduce
threats.
UDP—Abbreviation for User Datagram Protocol.
V
Validation—The process of applying specialized security test and evaluation
procedures, tools, and equipment needed to establish acceptance for joint usage of
an IS by one or more departments or agencies and their contractors.
Virtual Local Area Network (VLAN)—A software technology that enables grouping
of network nodes connected to one or more network switches into a single logical
network.
Virtual Private Network (VPN)—A private network built atop a public network.
Hosts within the private network use encryption to talk to other hosts.
Vulnerability—A weakness in hardware or software that can be used to gain
unauthorized or unwanted access to or information from a network or computer.