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builds up a table that maps MAC addresses to switch ports for knowing which ports the frames
should go to ( based upon the DMAC address in the frame ). This table contains both static
and dynamic entries. The static entries are configured by the network administrator if the
administrator wants to do a fixed mapping between the DMAC address and switch ports.
The frames also contain a MAC address ( SMAC address ), which shows the MAC address of
the equipment sending the frame. The SMAC address is used by the switch to automatically
update the
MAC table
the MAC table if no frame with the corresponding SMAC address have been seen after a
configurable age time.
MEP
MEP
is an acronym for Maintenance Entity Endpoint and is an endpoint in a Maintenance
Entity Group (ITU-T Y.1731).
MD5
MD5
is an acronym for Message-Digest algorithm 5. MD5 is a message digest algorithm, used
cryptographic hash function with a 128-bit hash value. It was designed by Ron Rivest in 1991.
MD5 is officially defined in RFC 1321 - The MD5 Message-Digest Algorithm.
Mirroring
For debugging network problems or monitoring network traffic, the switch system can be
configured to mirror frames from multiple ports to a mirror port. (In this context,
frame is the same as copying the frame.)
Both incoming (source) and outgoing (destination) frames can be mirrored to the mirror port.
N
NetBIOS
NetBIOS
is an acronym for Network Basic Input/Output System. It is a program that allows
applications on separate computers to communicate within a Local Area Network (LAN), and
it is not supported on a Wide Area Network (WAN).
The NetBIOS giving each computer in the network both a NetBIOS name and an IP address
corresponding to a different host name, provides the session and transport services described
in the Open Systems Interconnection (OSI) model.
NFS
NFS
is an acronym for Network File System. It allows hosts to mount partitions on a remote
system and use them as though they are local file systems.
NFS allows the system administrator to store resources in a central location on the network,
providing authorized users continuous access to them, which means NFS supports sharing of
files, printers, and other resources as persistent storage over a computer network.
NTP
NTP
is an acronym for Network Time Protocol, a network protocol for synchronizing the
with these dynamic MAC addresses. Dynamic entries are removed from
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mirroring
a
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