System information

Media Access
Book Title
8-138
Figure 8-1 NetWare and the OSI Reference Model
Media Access
NetWare runs on Ethernet/IEEE 802.3, Token Ring/IEEE 802.5, Fiber Distributed Data Interface
(FDDI), and ARCnet. NetWare also works over synchronous wide-area network (WAN) links using
the Point-to-Point Protocol (PPP).
Attached Resource Computer Network (ARCnet) is a simple network system that supports all three
primary cable types (twisted-pair, coaxial, and fiber-optic) and two topologies (bus and star). It was
developed by Datapoint Corporation and introduced in 1977. Although ARCnet has not attained the
popularity enjoyed by Ethernet and Token Ring, its low cost and flexibility have resulted in many
loyal supporters.
The Network Layer
Internetwork Packet Exchange (IPX) is Novell’s original network-layer protocol. When a device to
be communicated with is located on a different network, IPX routes the information to the
destination through any intermediate networks. Figure 8-2 shows the IPX packet format.
OSI reference model NetWare
Application7
Applications
Presentation6
Session5
Transport4
Network3
Link
Ethernet/
IEEE
802.3
NetBIOS
emulator
2
Physical1
Token
Ring/
IEEE
802.5
NetWare
shell
(client)
FDDI
NetWare
Core
Protocol
(NCP)
IPX
SPX
ARCnet
RPC
RPC-
based
application
PPP
LU 62
support