Transcript CE08

Chapter Extension 8
Understanding and
Setting up a SOHO
Network
© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke
Study Questions
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CE8-2
What are the components of a SOHO LAN?
Why do I access programs in the device
access router?
How does a SOHO network use DHCP?
What security options do I have?
How do I setup a SOHO network?
© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke
SOHO network
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Small office, home office
DSL modem
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Connects to device access router
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Contains Ethernet LAN switch, 802.11g wireless access
point, router, and special-purpose computer
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CE8-3
Computer contains firmware, acts as DCHP server
 Performs network address translation
UTP cables connect to computers and devices
Connects to telephone
© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke
SOHO network, continued
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Printer server
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NIC
Connects printer to LAN via device access router
Contains special-purpose computer
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Doesn’t need to connect to any computer
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CE8-4
Has firmware programs to set up and administer printer
Users can print without turning on computer
© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke
SOHO Network
Figure CE8-2
CE8-5
© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke
How Do I Access Programs in the
Device Access Router?
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Router has two IP addresses
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Private address for local traffic
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Public address for Internet traffic
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CE8-6
Assigned by manufacturer
Address used for internal routing
Provided by ISP
Address valid on public Internet
© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke
How Does a SOHO Network Use
DHCP?
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Device access router provides DHCP server
Computer contacts device to sign on to network
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DHCP server keeps list with assigned address and
MAC address
Base station data also maintained
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CE8-7
Obtains internal (private) IP address
LAN MAC address is MAC address of Ethernet switch
MAC address is from router
© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke
What Security Options Do I Have?
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Wired Equivalent Privacy (WEP)
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Wi-Fi Protected Access (WPA)
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Improved version
Developed by IEEE 802.11 committee
WPA2
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CE8-8
Provides security over wireless networks
Each computer accessing LAN must enter symmetric key to
encrypt data transmissions
Serious flaws
Newer version
© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke
MAC Address Filtering
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CE8-9
Doesn’t protect data transmissions from
interceptions
Prevents unauthorized access to LAN
Need MAC address of all devices allowed to
sign on
Enter addresses at MAC Address Filtering
under Wireless Security menu
© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke
How Do I Set up a SOHO Network?
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Follow instructions for device access router
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CE8-10
Must be done in proper order
Work upstream from modem to computer
Cabling must be set up before turning on devices
Socket is designated for line from modem
Use MAC address filtering to protect network
© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke
Active Review
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CE8-11
What are the components of a SOHO LAN?
Why do I access programs in the device
access router?
How does a SOHO network use DHCP?
What security options do I have?
How do I setup a SOHO network?
© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke