Chapter Extension 8 Understanding and Setting up a SOHO Network © 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke

CE8-2 Study Questions 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 CE8-3 SOHO network Small office, home office DSL modem – Connects to device access router Contains Ethernet LAN switch, g wireless access point, router, and special-purpose computer – 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 CE8-4 SOHO network, continued Printer server – NIC – Connects printer to LAN via device access router – Contains special-purpose computer Has firmware programs to set up and administer printer – Doesn’t need to connect to any computer Users can print without turning on computer

© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke CE8-5 SOHO Network Figure CE8-2

© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke CE8-6 How Do I Access Programs in the Device Access Router? Router has two IP addresses – Private address for local traffic Assigned by manufacturer Address used for internal routing – Public address for Internet traffic Provided by ISP Address valid on public Internet

© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke CE8-7 How Does a SOHO Network Use DHCP? Device access router provides DHCP server Computer contacts device to sign on to network – Obtains internal (private) IP address DHCP server keeps list with assigned address and MAC address Base station data also maintained – LAN MAC address is MAC address of Ethernet switch – MAC address is from router

© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke CE8-8 What Security Options Do I Have? Wired Equivalent Privacy (WEP) – Provides security over wireless networks – Each computer accessing LAN must enter symmetric key to encrypt data transmissions – Serious flaws Wi-Fi Protected Access (WPA) – Improved version – Developed by IEEE committee WPA2 – Newer version

© 2008 Pearson Prentice Hall, Experiencing MIS, David Kroenke CE8-9 MAC Address Filtering 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 CE8-10 How Do I Set up a SOHO Network? Follow instructions for device access router – 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 CE8-11 Active Review 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?