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TechNote: NETBEUI and NetBIOS |
NETBEUI
NETBios Extended User Interface is a non-routable Transport
layer protocol created by Microsoft. Novell and Microsoft wanted
to use the Session layer part of the Netbios protocol with other
transport protocols such as TCP and SPX and decided to split
up NetBios in NetBEUI and NETBIOS.
The reason it is non-routable is in its flat addressing
scheme, NETBEUI uses Netbios names to identify computers
on the network, that do not contain a network portion. Netbios
names are sometimes referred to as friendly names. NetBIOS
names are 16 characters in length and cannot contain any of
the the following characters: \ / : * ? " < > |,
but most version of Windows don't allow many other characters,
such as @ {} and others as well.
The first 15 characters represents a unique name identifying
a resource, the 16th character (if you would set a name of 8
character it is padded with spaces up to 15 characters long
to allow a '16th' character) is a suffix identifying the type
of resource or group of resources, for example the redirector,
server, or messenger services can be installed on one computer
resulting in three times the same name but with different suffixes.
NETBEUI is a broadcast protocol, meaning a computer running
NETBEUI discovers the MAC address from the intended communication
partner by sending out a broadcast with the NETBIOS name. The
main advantage of NETBEUI is that it is small in size and easy-configurable.
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Current related
exam objectives for the Network+ exam:
2.3 Differentiate between the following network protocols in
terms of routing, addressing schemes, interoperability and naming
conventions:
- NetBEUI
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Click
here for the complete list of exam objectives.
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Author:
Johan Hiemstra |
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