NA Lesson -1

 Understanding Network Infrastructures

Session Objectives:

·  Defines a network infrastructure

·  Discuss how a physical network infrastructure is different from a logical network infrastructure

What is meant by a network infrastructure?

A network infrastructure is a set of physical and logical components that provide the basis for connectivity, security, routing, management, access, and other integral features on a network.

How many types of network infrastructures are there?

There are mainly two types of network infrastructure.

·                     physical  infrastructure

·                     logical infrastructure

Physical  infrastructure

•  A network’s physical infrastructure is its topology—the physical design of the network along with hardware components such as cabling, routers, switches, bridges,hubs, servers, and hosts.
• This  infrastructure also includes wireless technologies.

Logical infrastructure

• The logical infrastructure of a network is composed of the many software elements that connect, manage, and secure hosts on the network.
• The logical infrastructure allows for communication between computers over the pathways that are described in the physical topology.

Elements of logical infrastructure

·                     Network Connections

·                     Network Addressing

·                     Name Resolution

·                     Network Computer Groups

·                     Active Directory

·                     Remote Access

·                     Network Address Translation

·                     Certificate Infrastructure