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Terminologies
Simplified
Mesh
Network Topology A physical network topology in which at least
two paths lead to and from each network node. This type of
topology provides backup connections in the event of connection
failure between nodes.
Message
Digest 5 Algorithm (MD5) A proposed encryption method for the
Simple Network Management Protocol (SNMP) that uses a message,
an authentication key, and time information to formulate a checksum
value known as a digest.
Message-oriented
Text Interchange System (MOTIS) A Message-Handling System (MHS)
developed by the International Standards Organization (ISO).
The basic MOTIS elements are compatible with the Consultative
Committee for International Telegraphy and Telephony (CCITT)
X.400 MHS specifications.
Message
Switching A switching technique that involves sending network
messages from node to node, with each message stored at a node
until a forwarding path becomes available.
Message-Transfer
Agent (MTA) A component specified in the Consultative Committee
for International Telegraphy and Telephony (CCITT) X.400 Message
Handling Service (MHS) that stores (or forwards) electronic
mail (e-mail) messages to a User Agent (UA), another MTA, or
to some other authorized recipient.
Message-Transfer
Layer (MTL) A component specified in the Consultative Committee
for International Telegraphy and Telephony (CCITT) X.400 Message
Handling Service (MHS) that represents one of two sublayers
of the Application Layer (Layer 7) in the OSI Reference Model
and provides access to transfer services across a network. The
other sublayer (which resides above the MTL) is the User Agent
Layer (UAL).
Message-Transfer
Service (MTS) A component specified in the Consultative Committee
for International Telegraphy and Telephony (CCITT) X.400 Message
Handling Service (MHS) that processes requests from Access Units
(AUs), Message Stores (MSs), Message-Transfer Agents (MTAs),
and User Agents (Uas).
Metropolitan
Area Network (MAN) A network that spans a larger geographical
area than a local area network (LAN) but a smaller geographic
area than a wide area network (WAN).
Microwave
Network A wireless network that uses microwave transmissions
to transmit signals between nodes on the network.
Microwave
Transmission A transmission that occurs in a high bandwidth
above 1-gigahertz (GHz) in the electromagnetic spectrum and
used in a wireless network. A microwave transmission requires
a line of sight between the sender and receiver, but can use
Earth-based or satellite receivers.
Mobile-Telephone
Switching Office (MTSO) A central computer that monitors all
cellular communication transmissions and adjusts channel assignments
to accommodate the fluctuating quality of signals.
Modem
Short for modulator/demodulator that describes a device used
to convert digital data into analog (or waveform) signals for
transmission along analog signal carriers. The device also converts
received analog signals; it does not translate back and forth
between analog and digital formats.
Multicast
A transmission method in which multiple (but not all) nodes
on the network receive a copy of a frame or packet.
Multicast
Backbone (MBONE) A multicast, virtual network that adds live
audio and video capabilities to the Internet. An MBONE network
is organized as clusters of networks connected by tunnels (paths
between endpoints that support both multicast transmissions)
and multicast Internet Protocol (IP) transmissions. |
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