Nortel Networks NTNM13XKAB Instrukcja Użytkownika Pobierz pdf (Strona 36)

5-2 TCP/IP Network Requirements

Integrated Network Management Rel 1.0 Standard July 1999

TCP/IP

The TCP/IP acronym stands for Transport Control Protocol/Internet Protocol.

These protocols are implemented in the protocol stack as shown in Figure 5-1

on page 1. This protocol is commonly used in conjunction with ethernet

networks. The TCP/IP address, also known as the IP address, is used to

uniquely identify each ethernet device on a network. This address is of the

form:

nnn.nnn.nnn.nnn

where nnn is a number from 0 to 255 (i.e., 47.246.0.71). This address is

normally assigned by the LAN administrator in order to prevent address

conflicts between ethernet devices. For more information please see Mark A.

Miller, Internetworking: A Guide to Network Communications, MT&T Books,

1991.

LAN requirements

The definition of a Local Area Network (LAN) is a network supporting

peer-to-peer communication over distances of tens of meters to several

kilometers.

The LAN requirements for the INM Broadband are:

• Connectivity to the INM workstation

• Ethernet connections between the INM Broadband and the X Terminals

• Router or bridge access to remote OPC modules through a WAN

• Ethernet connection between local OPCs and INM Broadband

Routers are usually stand-alone devices which provide the capability to

interface to many different types of networks, as well as to determine the

optimal path to the destination. Routers are commonly used to bridge remote

LANs through a WAN and can provide access to X.25, T1, frame relay, and

other types of network. The router for the INM Broadband must be capable of

supporting a minimum bandwidth of 56 Kbit/s for a setup consisting of the

INM Broadband and two X Terminals. The routers for the OPC modules must

have a minimum bandwidth of 56 Kbit/s to support 6 user sessions each. The

routers should be able to support both TCP/IP and OSI protocols for future

applications.

X.25

The X.25 protocol standard defines the interface to a Packet Data Network

(PDN), or more specifically, it defines the Data Terminal Equipment (DTE)

and Data Communications Equipment (DCE) interfaces between a

synchronous packet-mode host and a PDN. The X.25 protocol suite does not,

however, define the internal architecture of the PDN nor does it define the

PDN’s operation. An X.25 data packet network is normally used in a wide area

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Nortel Networks NTNM13XKAB Instrukcja Użytkownika Strona 36