April 21, 2023 RE Meyers, Ms.Ed., CCAI

CCNA Discovery Curriculum ReviewCCNA Discovery Curriculum Review

Networking for Home and Small BusinessesNetworking for Home and Small Businesses

Chapter 7:Chapter 7:

Wireless Technologies

April 21, 2023 RE Meyers, Ms.Ed., CCAI

DisclaimerDisclaimer

This review is not a comprehensive learning model of the curriculum!It is intended for chapter pre-exam prep, or post exam

review.Using this presentation as your sole source of teaching or

learning will not provide all the information you need to be successful in the Cisco Networking Academy.

All materials, images, text, and content unless noted remains the licensed property of the Cisco Networking Academy.

Please report all errors as soon as possible to:• remeyers@mail.wvu.edu

April 21, 2023 RE Meyers, Ms.Ed., CCAI

ObjectivesObjectives

Describe wireless technologies.Describe the various components and structure of

a WLAN Describe wireless LAN security issues and

mitigation strategiesConfigure an integrated wireless access point and

a wireless client .

April 21, 2023 RE Meyers, Ms.Ed., CCAI

ICG: Section 7.1ICG: Section 7.1

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Wireless Technology Wireless Technology 7.1.17.1.1

Wireless operates in 2.4GHZ range

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Wireless Technology Wireless Technology 7.1.17.1.1

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Wireless Technology Wireless Technology 7.1.27.1.2

Advantages over wired LAN’sAnytime anywhere connectivityEasy to install; inexpensiveEasy to add devicesMobilityGreater resources

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Wireless TechnologyWireless Technology

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Wireless Technology Wireless Technology 7.1.37.1.3

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ICG: Section 7.2ICG: Section 7.2

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Wireless LAN’sWireless LAN’s

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Wireless LAN’s Wireless LAN’s 7.2.17.2.1

The Wi-Fi logo on a device means that this equipment meets standards and should interoperate with other devices of the same standard.

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Wireless LAN’s Wireless LAN’s 7.2.27.2.2

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Wireless LAN’s Wireless LAN’s 7.2.27.2.2

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Wireless LAN’s Wireless LAN’s 7.2.27.2.2

SSID – Service Set IdentifierTells wireless devices which WLAN they belong toAll devices in the WLAN must have the same SSID

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Wireless LAN’s Wireless LAN’s 7.2.37.2.3

Two basic wireless modesIBSS – ad hoc connects clients in peer-to-peerBSS - infrastructure

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Wireless LAN’sWireless LAN’s

Channels are created by dividing up the available RF spectrum.

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Wireless LAN’s Wireless LAN’s 7.2.57.2.5

Most home AP devices can support various modes, mainly 802.11b, 802.11g, and 802.11n

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Wireless LAN’s Wireless LAN’s 7.2.57.2.5

SSID Broadcast enabled sends that this router is available

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ICG: Section 7.3ICG: Section 7.3

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Security Considerations on a WLANSecurity Considerations on a WLAN

An attacker can access your network from any location your wireless signal reaches.

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Security Considerations on a WLAN Security Considerations on a WLAN 7.3.17.3.1

Change the default settingsSSIDsPasswordsIP addresses

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Security Considerations on a WLANSecurity Considerations on a WLAN

MAC address filtering uses the MAC address to identify which devices are allowed to connect to the wireless network

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Security Considerations on a WLAN Security Considerations on a WLAN 7.3.37.3.3

AP authenticationOpen authentication is used by defaultPre-shared keys (PSK) - AP and client must be

configured with the same key or secret wordExtensible Authentication Protocol (EAP) - client

communicates with a backend authentication server

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Security Considerations on a WLAN Security Considerations on a WLAN 7.3.47.3.4

Encryption is the process of transforming data so that even if it is intercepted it is unusableWired Equivalency Protocol (WEP) uses pre-configured

keys 64 bits or 128 bits longWi-Fi Protected Access (WPA) is more secure than WEP

because it is significantly more difficult to crack.

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Security Considerations on a WLAN Security Considerations on a WLAN 7.3.57.3.5

Traffic filtering blocks undesirable traffic from entering or leaving the wireless network.

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ICG: Section 7.4ICG: Section 7.4

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Configuring and ISR and ClientConfiguring and ISR and Client

Plan for a wireless LAN implementation

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Configuring and ISR and ClientConfiguring and ISR and Client

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Configuring and ISR and ClientConfiguring and ISR and Client

April 21, 2023 RE Meyers, Ms.Ed., CCAI

Configuring and ISR and ClientConfiguring and ISR and Client

April 21, 2023 RE Meyers, Ms.Ed., CCAI

SummarySummary

Wireless technologies use electromagnetic radiation in the form of radio signals to carry information between devices.

Ease and convenience of connecting devices wirelessly creates security concerns that need to be addressed.

Before installing wireless devices, an installation plan should be created which includes strategies for layout and security.

April 21, 2023 RE Meyers, Ms.Ed., CCAI