Transcript FIT03.04 - SandersIT

FIT03.04
Demonstrate knowledge of
network applications and
diagnostics
Network Architectures
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The way a network is designed and
built, just as the architecture of a
building refers to its design and
construction
Requires special software to control the
flow of information between users
Client/Server Architecture
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Two primary components:
servers and clients
A server is a computer
with the primary
responsibility of servicing
requests, such as
database queries, as they
arrive. All data is stored
here at the server.
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A client consists of any
computer on the network
that submits requests to
the server
The relation in a
client/server network can
be identified as a
requester/provider
Requires a network
operating system, like
Windows NT, 2000, or XP
Pro
Peer to Peer Architecture
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Information is uniquely decentralized
Each PC acts as both a client
(information requester) and a server
(information provider)
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No network administrator
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Network is fast/inexpensive to setup
& maintain
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Easiest type of network to build, and
perfect for both home and office use
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Performance slows down when more
than one user accesses the same
computer at the same time
Network Applications
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Application layer is a protocol layer in Office System
Interconnection (OSI) or TCP/IP models
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OSI layers provide a description of how network hardware
and software work together in layered fashion to make
communications between computers possible
The model divides network communication into seven
layers
Each layer includes different network activities, equipment,
or protocols
Best known and most widely used guide for visualizing
networking environments
Network Diagnostics Tools
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Application
Provides applications with network access
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Presentation
Adds a common format for data presentation (syntax) and
provides code formatting
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Session
Establishes and monitors communication session between
machines; offers provisions for data expedition, class of service,
and exception reporting
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Transport
Breaks up data into smaller pieces and ensures error-free delivery
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Network
Addresses and routes messages (Routers operate here)
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Data Link
Packages data in frames and establishes sessions (Bridges,
switches operate here)
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Physical
Defines hardware (NIC, cabling and connectors) and transfers
data as a serial bit stream (Hubs, repeaters operate here)