Random Network+ Question #8

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Hmmm how about UDP

 

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thats at the same layer as TCP which is layer 4

 

Is ARP native to windows

Never did like that OSI model, far too many overlaps to make things crystal clear

 

no ARP is most definatly not, but didnt get that clue till after hehe :P

 

Going way way way out on a limb here but what about X.25, Frame Relay or ISDN?

And if they're wrong, it's no surprise to me as I know nothing about it at all.

 

What about CDDI, HomePNA, or ATM?

See, I still don't know anything.

 

Ok since it almost 3 am here means it about 9 your guys time. So I'll post before I go to bed so ou all don't have to wait till this evening. Sweet of me I know.

Given that this network protocol:
Supports connectionless transmission.
Operates at the Data Link Layer.
Uses Microsoft NDIS to communcate with the network.
Which network protocol am I?

The correct anwser is: NetBEUI.
NetBEUI is short for NetBIOS Enhanced User Interface. Which is an extension to provide support for NetBIOS (Network Basic Input Output System). Often these two protocols are referred to together as NetBEUI/NetB IOS.


It was developed in the 1980’s by IBM to support LAN workgroups under OS/2 and LAN Manager. Later it was enhanced by Microsoft and Novell for use with network aware operating systems.



NetBEUI was developed for workgroups between 2 to 200 nodes. This protocol has a low overhead which makes it fast and efficient. This protocol does not support connection-oriented services. It has no networking layer and therefore no routing capability. This is why it is only suitable for small networks. All routers will drop NetBEUI/NetBIOS packets unless the router is smart enough to bridge the packets. However, it does operate at the Data Link layer which means it has datagram and connectionless transmission support and can be used with bridges.



NetBios (Network basic input output system).: A Session layer protocol to manage data exchange and network access. It opens communication sessions for applications that want to communicate on a network.



TCP/IP (Transmission Control Protocol/Internet Protocol): TCP/IP is a connection-oriented protocol. This protocol was developed by the DoD in conjunction with the internet. TCP/IP has two transport protocols.

TCP (Transmission Control Protocol)., and UDP (User datagram Protocol).



TCP is used by upper layer protocols that necessitate a dependable connection oriented service such as HTTP. While other upper layer protocols such as NFS needs speed instead of dependability and uses UDP, which is a Transport layer connectionless protocol. It does not provide the dependability that TCP does.



IPX/SPX: IPX/SPX - A connectionless, routable network protocol based on the Xerox XNS Architecture. It is the default protocol for versions of NetWare before Netware 5. It operates at the Network layer of the OSI model and is responsible for addressing and routing packets to workstations or servers on other networks.

The source that I use is Network+ Study Guide Third Edition. by David Groth from Sybex

 

Just so it's known, me ant Mitz had a good few hours debating as to weather or not this answer is actually correct, (we like our debates, see the above 100 posts) :P
I'm still not convinced NetBeui is a layer 2 protocol :P

So if anyone has any thoughts on this feel free to jump into the debate and proove me (or mitz) wrong! as one of us has to be, LOL

 

And I thought we were debating apr. But I have taken my meds so my debating for one day is over. Now I must find my pillow. Everyone enjoy.

 

I didn't do an exhaustive search, a casual Google of "osi layer netbeui" indicates that it seems to reside at layers 3 and 4 of the OSI Model:

http://www.geocities.com/SiliconValley/Monitor/3131/ne/osimodel.html

http://www.nationmaster.com/encyclopedia/OSI-model

http://www.hermit.cc/teach/ho/lan/osi.htm

 

My findings were similar Trip, with NetBios sitting at 5, I could perhaps try and do a packet capture, but I dont believe I use NetBeui anywhere on my network

However the information is sketchy at best, and I couldnt turn up an RFC on it, or information on the IBM research site, seems odd theres so little information on it

Also Netbeui versions 1 - 4 each work somewhat differently, which is why we have the conflicting information regarding layers 3 - 4,


But yes my prime concern was flagged when mitz said ARP resdes at layer 3, as I definatly knew that to be incorrect, at which our little debate began

More Research to come, but I dont think I can get more conclusive than a packet capture and the RFC pertaining to the packet construction, lol!