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Page 116 / 141 Scroll up to view Page 111 - 115
ZyXEL P-330W User’s Guide
Appendix C Setting up Your Computer’s IP Address
116
•
Select
Built-in Ethernet
from the
Show
list.
•
Click the
TCP/IP
tab.
3
For dynamically assigned settings, select
Using DHCP
from the
Configure
list.
Figure 82
Macintosh OS X: Network
4
For statically assigned settings, do the following:
•
From the
Configure
box, select
Manually
.
•
Type your IP address in the
IP Address
box.
•
Type your subnet mask in the
Subnet mask
box.
•
Type the IP address of your P-330W in the
Router address
box.
5
Click
Apply Now
and close the window.
6
Turn on your P-330W and restart your computer (if prompted).
Verifying Settings
Check your TCP/IP properties in the
Network
window.
Page 117 / 141
ZyXEL P-330W User’s Guide
117
Appendix C Setting up Your Computer’s IP Address
Page 118 / 141
ZyXEL P-330W User’s Guide
Appendix D Wireless LAN and IEEE 802.11
118
Appendix D
Wireless LAN and IEEE 802.11
A wireless LAN (WLAN) provides a flexible data communications system that you can use to
access various services (navigating the Internet, email, printer services, etc.) without the use of
a cabled connection. In effect a wireless LAN environment provides you the freedom to stay
connected to the network while roaming around in the coverage area.
Benefits of a Wireless LAN
Wireless LAN offers the following benefits:
•
It provides you with access to network services in areas otherwise hard or expensive to
wire, such as historical buildings, buildings with asbestos materials and classrooms.
•
It provides healthcare workers like doctors and nurses access to a complete patient’s
profile on a handheld or notebook computer upon entering a patient’s room.
•
It allows flexible workgroups a lower total cost of ownership for workspaces that are
frequently reconfigured.
•
It allows conference room users access to the network as they move from meeting to
meeting, getting up-to-date access to information and the ability to communicate
decisions while “on the go”.
•
It provides campus-wide networking mobility, allowing enterprises the roaming
capability to set up easy-to-use wireless networks that cover the entire campus
transparently.
IEEE 802.11
The 1997 completion of the IEEE 802.11 standard for wireless LANs (WLANs) was a first
important step in the evolutionary development of wireless networking technologies. The
standard was developed to maximize interoperability between differing brands of wireless
LANs as well as to introduce a variety of performance improvements and benefits.
The IEEE 802.11 specifies three different transmission methods for the PHY, the layer
responsible for transferring data between nodes. Two of the methods use spread spectrum RF
signals, Direct Sequence Spread Spectrum (DSSS) and Frequency-Hopping Spread Spectrum
(FHSS), in the 2.4 to 2.4825 GHz unlicensed ISM (Industrial, Scientific and Medical) band.
The third method is infrared technology, using very high frequencies, just below visible light
in the electromagnetic spectrum to carry data.
Page 119 / 141
ZyXEL P-330W User’s Guide
119
Appendix D Wireless LAN and IEEE 802.11
Ad-hoc Wireless LAN Configuration
The simplest WLAN configuration is an independent (Ad-hoc) WLAN that connects a set of
computers with wireless nodes or stations (STA), which is called a Basic Service Set (BSS). In
the most basic form, a wireless LAN connects a set of computers with wireless adapters. Any
time two or more wireless adapters are within range of each other, they can set up an
independent network, which is commonly referred to as an Ad-hoc network or Independent
Basic Service Set (IBSS). The following diagram shows an example of notebook computers
using wireless adapters to form an Ad-hoc wireless LAN.
Figure 83
Peer-to-Peer Communication in an Ad-hoc Network
Infrastructure Wireless LAN Configuration
For Infrastructure WLANs, multiple Access Points (APs) link the WLAN to the wired
network and allow users to efficiently share network resources. The Access Points not only
provide communication with the wired network but also mediate wireless network traffic in
the immediate neighborhood. Multiple Access Points can provide wireless coverage for an
entire building or campus. All communications between stations or between a station and a
wired network client go through the Access Point.
The Extended Service Set (ESS) shown in the next figure consists of a series of overlapping
BSSs (each containing an Access Point) connected together by means of a Distribution System
(DS). Although the DS could be any type of network, it is almost invariably an Ethernet LAN.
Mobile nodes can roam between Access Points and seamless campus-wide coverage is
possible.
Page 120 / 141
ZyXEL P-330W User’s Guide
Appendix D Wireless LAN and IEEE 802.11
120
Figure 84
ESS Provides Campus-Wide Coverage

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