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Planning a Network Infrastructure Topology
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Module Planning a Network Infrastructure
TopologyOverview
This module provides an overview of network infrastructure. It is divided into thefollowing 4 lessons:
Lesson 1 Network infrastructure - explains the components of a networkinfrastructure and activities involved in its planning, implementation, and itsmaintenance.
Lesson 2 Selecting Data Link Layer- explains the OSI reference model.Also describes the parameters on which a data link layer protocol is chosen.
Lesson 3 Selecting Network/Transport Layer Protocol - explainsnetwork/transport layer protocols supported by Windows Server 2003.
Lesson 4 Locating Network Resources - explains factors that influencelocations of workstations, peripherals, cables, connectivity devices andservers.
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Planning a Network Infrastructure Topology
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Lesson 1
Network InfrastructureIntroduction
This lesson introduces tasks that are involved in planning,
implementing and maintaining a network infrastructure. In thislesson, you will learn about :
Components of Network Infrastructure
Planning Network Infrastructure
Implementing Network Infrastructure
Maintaining Network Infrastructure
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In this topic you will understand the different components of a
network infrastructure.
Physical Components
Topology physical design
Hardware routers, hub
Logical Components
Abstract Elements TCP/IP, Digital certificates
Concrete Elements software products
Topic 1Defining Network Infrastructure
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Planning a Network Infrastructure Topology
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Topic 2 Planning Network Infrastructure
This topic explains activities involved in planning a network
infrastructure.
Defining the planning process
Process of selecting physical and logical infrastructure layout based on therequirements of network users, its owners and the hardware and software
components.
Planning activities
Identify tasks of network usersIdentify possible security threats
Create a network blueprint
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Planning a Network Infrastructure Topology
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Topic 3 Implementing Network Infrastructure
This topic explains key tasks in implementing a network
infrastructure.
Implementation tasks
Select protocols, operating systems, applications, and security
mechanisms
Deploy the chosen technologies
Select IP addresses and subnet mask
Design a DNS namespace Create IPSec policies
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Planning a Network Infrastructure Topology
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Topic 4
Maintaining Network InfrastructureThis topic explains activities that comprise network maintenance.
Maintenance activities
Updating operating systems and applications
Testing updated versions in a simulated lab environment
Deploying updates to the live environment
Monitoringprocesses
Periodic examination of logs
Function testing
Network traffic analysis
Troubleshooting
Identification of problems and their resolution
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Planning a Network Infrastructure Topology
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Lesson 2 Selecting Data Link Layer Protocols
Introduction
A reference model provides a framework for computers on a
network to exchange information. A reference model divides a
network into multiple layers and assigns functions to each layer. OSI
is the most common reference model used to study a network. In
this lesson, you will learn about :
Open systems Interconnection (OSI) Reference Model
Data Link Layer Protocols
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Planning a Network Infrastructure Topology
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Topic 1 OSI Reference Model
This topic explains the OSI reference model with examples.Characteristics of OSI Open Systems Interconnection
OSI stands for Open Systems Interconnection
The OSI model divides the network into 7 layers
The model was first proposed by ISO in 1984
SME: OSI REFERENCE MODEL DIAGRAM
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Topic 2 Data Link Layer Protocols
This topic discusses the functions of data link layer protocols and itssub-layers.
Main functions
Grouping bits from the physical layer into framesDetecting errors in frames
Regulating the flow of frames
Sub LayersMedia Access Control (MAC)
Enables multiple computers to share a common channelLogical Link Control (LLC)
Performs node-to-node error detection, frame synchronization and flowcontrol
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Planning a Network Infrastructure Topology
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Topic 3 - Selecting a Data Link Layer
This topic explains the different factors to be considered in selecting a
data link layer.
Selection factors
Type of transmission mediumDistance between workstations
Transmission speed
Amount of traffic to be carried by the network
Cost of operations
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Planning a Network Infrastructure Topology
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Introduction
Windows Server 2003 supports the following network/ transport
layer protocols:
TCP/ IP
IPX
NetBIOS
In this lesson, you will learn about :
Working with TCP/ IP
Lesson 3 Selecting Network/Transport Layer
Protocols
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Topic 1 Working with TCP/IP
This topic explains the primary TCP/IP protocols. It also explainsthe IPX and NetBIOS Extended User Interface.
Primary protocols of TCP/IPInternet Protocol (IP) - network layer
Transmission Control Protocol (TCP) - transport layerUser Datagram Protocol (UDP) - transport layer
IPX Internetwork Packet ExchangeNetwork layer protocol
Designed only for personal computer LANsAddressing system is based on the computer network interface adaptor
Contd.
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Topic 1 Working with TCP/IP
NetBEUI NetBIOS Extended User Interface
Designed for Windows NT 3.1 and Windows for Workgroups operating
systems
Cannot route traffic between networks
Used as a troubleshooting tool
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Lesson 4 Locating Network Resources
Introduction
Based on the information collected by the administrator, a blueprint
on the location for network resources is created. In this lesson, you
will learn about :
Locating Workstations
Locating Peripherals
Locating Cables
Locating Connectivity Devices
Locating Servers
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Topic 1 Locating Workstations
After the floor plan for the site is ready, the locations for
workstations have to be planned. This topic explains the steps for
planning these locations.
Steps in planning workstation location:Determine purpose of the workstations to be installed
Position the computer in relation to the desk
Identify types of workstation required
Identify support required for various workstations
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Topic 2 Locating Peripherals
This topic lists the factors to be considered in planning the locations
of peripherals.
Peripheral location factors
ErgonomicsMaintenance access to the machine
Proximity to consumables like paper and toner ink
Physical security of the peripherals
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Topic 3 Locating Cables
The location of cables is an important part of the network blueprint.
This topic focuses on the factors to be considered in locating
cables.
Cable location factorsType of cable installation
Location of obstacles for the cables
Location of hubs, patch panels.
Location of interfering objects for the cables-
Ways of securing cables-for external installations.
Additional cable runs for future expansion
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Topic 4 Locating Connectivity Devices
Location of connectivity devices such as hubs and patch panels
determine the site blueprint. This topic discusses factors that
influence this decision.
Decision factorsLocation of hubs and patch panels
Length of the cables
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Topic 5 Locating Servers
This topic explains factors to be considered in locating servers
Server location factors
Server Security
Power Protection factors
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Conclusion
Summary of the module
A network infrastructure is an integration of physical and logical components
that supports the flow and processing of information. A network infrastructure
provides connectivity, security, routing, management, access and other integral
featuresOSI divides the network into seven layers and assigns each layer certain
functions.
TCP/ IP is the most widely used protocol suite by network designers. TCP/ IP
is completely hardware-independent and therefore has its own addressing
system.Question and Answer Session