HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual page 759

Appendix B: Glossary
MPLS Multiprotocol Label Switching. A process that allows packets to be routed
according to their pre-defined labels instead of according to their IP addresses
and routing protocol table entries. Incoming packets are assigned a label by
a label edge router (LER). Packets are forwarded along a label switch path
(LSP), on which each label switch router (LSR) makes forwarding decisions
based solely on the contents of the label. At each hop, the LSR strips off the
existing label and applies a new label which tells the next hop how to forward
the packet. An LSP can cross multiple Layer 2 transports such as ATM, Frame
Relay or Ethernet. Because MPLS forwards packets based on configured LSPs,
rather than on IP addresses, it supports the routing of packets with private IP
addresses through a public network. For more information on MPLS, see RFC
2702 (at http://www.ietf.org/rfc/rfc2702.txt).
MPPE Microsoft Point-to-Point Encryption. An encryption algorithm that uses RSA
RC4 and 40- or 128-bit keys to secure data transmitted across a WAN tunnel.
For more information on MPPE, see RFC 3078 (at http://www.ietf.org/rfc/
rfc3078.txt).
MPPP Multilink Point-to-Point Protocol. See MLPPP.
MRRU Maximum Receive Reconstructed Unit. An LCP configuration option used
with MLPPP connections. The MRRU specifies the maximum size of a reas-
sembled frame that can be sent over a link. The default value is 1500 octets.
A device sets a value in an LCP frame's MRRU field to indicate to the peer that
it wants to establish an MLPPP connection. See also LCP, MLPPP, and PPP.
MRU Maximum Receive Unit. An LCP option that communicates the maximum
frame size to be sent over the PPP connection. The default value is 1500 octets.
See also LCP and PPP.
MTBF Mean Time Between Failures. A measure of how reliable a hardware product
or component is. For most components, the measure is typically in thousands
or even tens of thousands of hours between failures.
MTU Maximum Transmission Unit. The largest unit of data that can be sent across
a given medium.
Multilink Frame See MLFR.
Relay
Multimode Fiber Optical fiber that is designed to carry multiple light rays or groups of light rays
(modes) concurrently, each at a slightly different reflection angle within the
optical fiber core. Multimode fiber transmission is used for relatively short
distances because the modes tend to disperse over longer lengths.
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