Appendix
Virtually all Internet addresses are configured with words or characters (i.e.,
www.linksys.com, www.yahoo.com, etc.) In actuality, however, these Internet
addresses are assigned to IP addresses, which are the true addresses on the
Internet.
IP and web addresses, however, can sometimes be long and hard to remember.
Because of this, certain ISPs will shorten their server addresses to single words
or codes on their users’ web browser or e-mail configurations. If your ISP’s E-
mail and Web server addresses are configured with single words (“www”, “e-
mail”, “home”, “pop3”, etc.) rather than whole Internet Addresses or IP
Addresses, the Router may have problems sending or receiving mail and
accessing the Internet. This happens because the Router has not been config-
ured by your ISP to accept their abbreviated server addresses.
The solution is to determine the true web addresses behind your ISPs code
words. You can determine the IP and web addresses of your ISP’s servers by
“pinging” them.
Step One: Pinging for an IP Address
The first step to determining your ISP’s web and e-mail server address is to
ping its IP Address.
1. Power on the computer and the cable or DSL modem, and restore the
network configuration set by your ISP if you have since changed it.
2. Click Start, then Run, and type "command". This will bring up the DOS
Window.
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efficiency for reliability, integrity, and security. In other words, more band-
width is consumed than in the case of narrowband transmission, but the trade
off produces a signal that is, in effect, louder and thus easier to detect, provid-
ed that the receiver knows the parameters of the spread-spectrum signal being
broadcast. If a receiver is not tuned to the right frequency, a spread-spectrum
signal looks like background noise. There are two main alternatives, Direct
Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum
(FHSS).
What is DSSS? What is FHSS? And what are their differences? Frequency-hop-
ping spread-spectrum (FHSS) uses a narrowband carrier that changes frequen-
cy in a pattern that is known to both transmitter and receiver. Properly syn-
chronized, the net effect is to maintain a single logical channel. To an unin-
tended receiver, FHSS appears to be short-duration impulse noise. Direct-
sequence spread-spectrum (DSSS) generates a redundant bit pattern for each
bit to be transmitted. This bit pattern is called a chip (or chipping code). The
longer the chip, the greater the probability that the original data can be recov-
ered. Even if one or more bits in the chip are damaged during transmission, sta-
tistical techniques embedded in the radio can recover the original data without
-the need for retransmission. To an unintended receiver, DSSS appears as low
power wideband noise and is rejected (ignored) by most narrowband receivers.
Would the information be intercepted while transmitting on air? WLAN features
two-fold protection in security. On the hardware side, as with Direct Sequence
Spread Spectrum technology, it has the inherent security feature of scrambling.
On the software side, WLAN series offer the encryption function (WEP) to
enhance security and Access Control. Users can set it up depending upon their
needs.
What is WEP? WEP is Wired Equivalent Privacy; a data privacy mechanism
based on a 40 bit shared key algorithm, as described in the IEEE 802.11 stan-
dard.
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Etherfast
®
Wireless AP + Cable/DSL Router with PrintServer
How to Ping Your ISP’s E-mail & Web Addresses
NOTE: If you don’t have your ISP’s web and e-
mail IP Addresses, you must either get them from
your ISP or follow these steps prior to connecting
the Cable/DSL Router to your network.
Instant Broadband
TM
Series
