Nortel Networks NTNM13XKAB TCP/IP Network Requirements, Ethernet, OSI 7 Layer Protocol Stack

	5-1
TCP/IP Network Requirements	5-
This section provides a general description of ethernet networks, TCP/IP and
X.25 protocols and the requirements needed to support the operation of the
Network Wide Backup and Restore application with INM Broadband.
Ethernet		5
The ethernet protocol is a standard defined by the Institute of Electrical and
Electronics Engineers (IEEE) for communication networks. The IEEE

standard 802.3 defines the layer 2 functionality in the protocol stack shown below.

Figure 5-1

OSI 7 Layer Protocol Stack

NM-00014(R5)

7

6

5

4

3

2

1

Application

Presentation

Session

Transport

Network

Data Link

Physical

The characteristics of a 10-Base-T Ethernet network are:

•Maximum speed of 10 Mbits/sec

•Maximum number of 100 Ethernet devices per network

•Carrier Sense Multiple Access with Collision Detection (CSMA/CD) media access control

Network Wide Backup & Restore Planning Guide Rel 1.0 Standard July 1999