Download Data Communication Network

333: DISCUSS THE FUNDAMENTALS OF
NETWORKING
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1. Discuss networking concepts (20 hrs)
2. Discuss hardware & software requirement
to setup a Local Area Network (20 hrs)
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PERFORMANCE STANDARD
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Objectives:
◦ Given a scenario, identify correctly the hardware and
services required for a Network
◦ 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
Define a Node/Host
Discuss functional &
geographical
relationship among
nodes
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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
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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
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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.
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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
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Nodes: Special purpose devices
PC
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server
switch
bridge
router
Links: Connections between nodes
Optical fiber
Coaxial cable
wireless
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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.
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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.
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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.
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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.
Question?