OSI Reference Model

http://tfbbs.tvinet.com/amitcp/OSI_Reference_Model.html

ISO-OSI Model

http://www.citybeach.wa.edu.au/lessons/computing12/lan/iso.html

PHYSICAL LAYER STANDARDS BASED ON OSI MODEL

http://spider.uchsc.edu/is/hd/hdstand.html

OSI - a critique

http://www.cs.ucl.ac.uk/staff/J.Crowcroft/ods/node227.html

TCP/IP and OSI

http://melb.alexia.net.au/~www/yendor/internetinfo/tcpip_osi.html

The OSI Model and NetWare

http://www.tbi.net/~jhall/novlan.html

ISO/OSI Network Model

http://linux.ucs.indiana.edu/usail/network/nfs/network_layers.html

OSI protocols

http://ns.kren.nm.kr/Internet/osi_protocol.html

OSI model

http://www.sju.edu/~jhodgson/netw/osi.html 

http://www.unm.edu/~network/presentations/references/index.html