1 © 2004, cisco systems, inc. all rights reserved. ccna 1 v3.1 module 3 networking media

1© 2004, Cisco Systems, Inc. All rights reserved.

CCNA 1 v3.1 Module 3 Networking Media

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Objectives

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Atoms and Electrons

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Atoms and Electrons

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Atoms and Electrons

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Atoms and Electrons

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Voltage

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Resistance and Impedance

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Current Flow

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Circuits

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Circuits

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Cable Specifications

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Coaxial Cable

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Shielded Twisted-Pair Cable

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Unshielded Twisted Pair (UTP)

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Unshielded Twisted Pair (UTP)

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Unshielded Twisted Pair (UTP)

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Unshielded Twisted Pair (UTP)

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Unshielded Twisted Pair (UTP)

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Unshielded Twisted Pair (UTP)

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Unshielded Twisted Pair (UTP)

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The Electromagnetic Spectrum

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Ray Model of Light

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Ray Model of Light

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Reflection

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Reflection

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Refraction

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Total Internal Reflection

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Total Internal Reflection

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Total Internal Reflection

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Multimode Fiber

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Multimode Fiber

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Multimode Fiber

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Multimode Fiber

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Multimode Fiber

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Multimode Fiber

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Single-mode Fiber

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Optical Media

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Signals and Noise in Optical Fibers

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Scattering

414141© 2004, Cisco Systems, Inc. All rights reserved.

Bending

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Fiber End Face Finishes

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Fiber End Face Polishing Techniques

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Splicing

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Calibrated Light Sources and Light Meter

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Wireless LAN Standards

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Internal Wireless NIC for Desktop or Server

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PCMCIA NIC for Laptop

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External USB Wireless NIC

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Access Point

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Wireless LAN

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Roaming

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IEEE 802.3 Wireless Frame Types

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Adaptive Frame Types

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Authentication and Association Types

Forming an Association is an 8 step process:

1. Clients start off being Unauthenticated and unassociated

2. All access points (AP’s) transmit a beacon management frame at a fixed interval

3. Clients listens for beacon messages to identify AP’s in range

4. The client selects a network it wishes to join

5. The client and AP send management frames to each other, and perform mutual authentication

6. If authentication is successful, the client is Authenticated, but remains unassociated. (The AP knows who it is, but is yet to allocate resources to it)

7. Client sends association request frames to the AP, which responds with association response frames.

8. Client is granted access to services, and thus becomes Associated.

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Radio Wave

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Modulation

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Omni Directional Antenna

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Wireless Security