IntroToNetworking2x - GA-HITEC

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24 Νοε 2013 (πριν από 3 χρόνια και 9 μήνες)

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Introduction to
Broadband and
Networking

Course Lesson 2 of 2

Instructor: Walt Dundore

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Learning Outcomes

1. List and describe the various types of network communications and network

addressing.

2. List and define the different types of networks.

3. Describe different network topologies.

4. List and describe different network standards and protocols.

5. Describe wireless communication.

6. List and describe network hardware.


The OSI Model

The OSI Model

The OSI Model


Network Hardware

OSI Physical Layer

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When connecting computing equipment there
are two major categories of media used:

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Wired

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Wireless


Network Hardware

OSI
Physical Layer

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Major Wired Technologies:

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Twisted Pair

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Coaxial Cable

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Optical Fiber


Network Hardware

OSI Physical Layer

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Twisted Pair

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T
he
most widely used medium for
telecommunication

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Can
be utilized for both voice and data
transmission.

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Reduces crosstalk and
electromagnetic
induction.

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Speeds
ranges from 2 million bits per second to 100
million bits per second.

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Unshielded
Twisted Pair (UTP)

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Shielded
twisted
-
pair (STP
)

Network Hardware

OSI Physical Layer

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Coaxial Cable

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Used
for cable television systems, office buildings, and other work
-
sites for
local area networks.

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Copper
or aluminum wire wrapped with insulating layer

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Insulation helps
minimize interference and distortion.

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Speeds
range from 200 million to more than 500 million bits per second.

Network Hardware

OSI Physical Layer

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Optical Fiber

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Glass
fiber

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Carries data
by
pulses
of light.

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Not
affected by electromagnetic radiation.

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Speed
may reach trillions of bits per second.

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can
carry multiple multiple signals in a single strand.

Network Hardware

OSI Physical Layer

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Wireless Networks

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Not connected by cables of any kind

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Avoids the costly process of introducing cables into to a
building

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Connects multiple buildings

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Uses radio waves.

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Physical level, (
L
ayer 1), of the network structure.

Network Hardware

OSI Physical Layer

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Wireless PAN (Personal Area Network)

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Bluetooth radio

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Infrared light

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ZigBee


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Intel "My
WiFi
" and Windows 7 "virtual Wi
-
Fi

Network Hardware

OSI Physical Layer

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Wireless LAN (Local Area Network)

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Uses an access point

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Wi
-
Fi

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Fixed Wireless Data

Network Hardware

OSI
Data Link
Layer

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Wired Ethernet Hub


Network Hardware

OSI Physical Layer

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Wireless LAN (Local Area Network)


OSI Data Link
Layer


OSI
Data Link Layer

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MAC Addressing

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Each
hardware
node
, or device, has a unique Layer 2
address

OSI
Data Link Layer

To view the MAC address of a node on a Windows machine,
first open the command prompt by clicking the start button.
Then in the search or run box type “
cmd


OSI
Data Link Layer

While in the command prompt, type “
ipconfig

/all” which is
the IP configuration utility. This should show the physical
address, or MAC address:


Network Hardware

OSI
Data Link
Layer

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Network Bridge


Network Hardware

OSI
Data Link
Layer

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Wired Ethernet Network Switch


OSI Network Layer


OSI Network Layer


OSI
Network Layer

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Network Addressing

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Logical
addresses

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Internet Protocol (IP)

OSI
Network Layer

To view the
ip

address of a Windows machine, first open the
command prompt by clicking the start button. Then in the
search or run box type “
cmd


OSI
Network Layer

While in the command prompt, type “
ipconfig
” which is the IP
configuration utility. This should show the IP address:

Network Hardware

OSI
Network Layer

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Wired Ethernet Network Router


OSI Transport Layer


OSI
Transport Layer


OSI Session Layer


OSI Presentation Layer


The OSI Model


OSI Presentation Layer

Secure Sockets

The OSI Model


Troubleshooting:

Test the Physical Layer

Troubleshooting:

Test the Network Layer

To view the gateway address of a Windows machine, first open
the command prompt by clicking the start button. Then in the
search or run box type “
cmd


Troubleshooting:

Test the Network Layer


Troubleshooting:

Test the Network Layer


Troubleshooting:

Test the Network Layer


Troubleshooting:

Test the Presentation Layer


Troubleshooting:

Test the Application Layer


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Learning Outcomes

1. List and describe the various types of network communications and network

addressing.

2. List and define the different types of networks.

3. Describe different network topologies.

4. List and describe different network standards and protocols.

5. Describe wireless communication.

6. List and describe network hardware.


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References

Cisco Systems, Inc., (2003, March 14). CCNA: network media types.
(Retrieved from ciscopress.com)


Andrew S.
Tanenbaum
,
Computer Networks

(ISBN 0
-
13
-
349945
-
6)


Open Systems Interconnection
--

Basic Reference Model: The Basic Model
ISO/IEC 7498
-
1:1994
(http://www.iso.org/iso/catalogue_detail.htm?csnumber=20269)


Contact Information

Walt
Dundore

walt@dundore.org