Data Communication Network

333: DISCUSS THE FUNDAMENTALS OF NETWORKING

333: DISCUSS THE FUNDAMENTALS OF NETWORKING

1. Discuss networking concepts (20 hrs)

2. Discuss hardware & software requirement to setup a Local Area Network (20 hrs)

333.1: Discuss networking concepts PERFORMANCE STANDARD

◦ Given a scenario, identify correctly the hardware and services required for a Network

Objectives:◦ Define a Node/Host ◦ Discuss functional & geographical relationship among

nodes◦ Discuss services provided by a common carrier such as

Leased line Switched line

◦ Describe switching techniques Circuit Message Packet

◦ Discuss ISO/OSl reference model◦ Explain network communication protocols

SKILL AREA 331.1.1 and 331.1.2

Define a Node/Host

Discuss functional & geographical

relationship among nodes

What is Networking? Networking involves connecting computers

and other electronic devices for the purpose of sharing information and resources and for communication

A great deal of technology is required for one device to connect and communicate with another, and many choices for physical connections and related software are possible

Networking Fundamentals An elementary network consists of two

computers connected by some kind of transmission medium

Motivation: need to share data and to communicate quickly and efficiently◦ Sharing enables users to exchange information and

route data between them as workflow demands◦ Can improve human communication substantially◦ Peripheral device sharing enables users to take

advantage of peripherals and other devices attached directly to a network or to a generally available computer attached to a network

Networking Fundamentals (continued)

How does the Internet Look Like?

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Where are we headed?

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In communication networks, a node is a connection point, either a redistribution point or a communication endpoint.

A node can be a computer, printer, or other device capable of sending and/or receiving data generated by other nodes on the network.

Node definition

If the network in question is the Internet or an Intranet, many physical network nodes are host computers, also known as Internet nodes, identified by an IP address, and all hosts are physical network nodes.

However, some datalink layer devices such as switches, bridges and WLAN access points do not have an IP host address (except sometimes for administrative purposes), and are not considered to be Internet nodes or hosts, but as physical network nodes and LAN nodes

Computer network nodes

Network Elements Nodes: Special purpose devices

Links: Connections between nodes

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PC server switch bridge router

Optical fiber Coaxial cable wireless

The task of connecting nodes via links, so that nodes can exchange information, reliably, timely, efficiently, safely, privately, “greenly”, and with low cost.

Need to define the network architecture, protocols, applications, interfaces, policies, usages.

Network Design

A network host is a computer connected to a computer network.

A network host may offer information resources, services, and applications to users or other nodes on the network.

A network host is a network node that is assigned a network layer host address.

Host

Computers participating in networks that use the Internet Protocol Suite may also be called IP hosts.

Specifically, computers participating in the Internet are called Internet hosts, sometimes Internet nodes.

Host

Internet hosts and other IP hosts have one or more IP addresses assigned to their network interfaces.

The addresses are configured either manually by an administrator, automatically at start-up by means of the Dynamic Host Configuration Protocol (DHCP), or by stateless address auto configuration methods.

Host

Question?