Ieee 802.11 Specifications; Management And Monitoring Capabilities; Http/Https Interface; Command Line Interface - Proxim AP-4000 User Manual

Introduction

IEEE 802.11 Specifications

IEEE 802.11 Specifications
In 1997, the Institute of Electrical and Electronics Engineers (IEEE) adopted the 802.11 standard for wireless devices operating in the 2.4
GHz frequency band. This standard includes provisions for three radio technologies: direct sequence spread spectrum, frequency hopping
spread spectrum, and infrared. Devices that comply with the 802.11 standard operate at a data rate of either 1 or 2 Megabits per second
(Mbits/sec).
In 1999, the IEEE modified the 802.11 standard to support direct sequence devices that can operate at speeds of up to 11 Mbits/sec. The
IEEE ratified this standard as 802.11b. 802.11b devices are backwards compatible with 2.4 GHz 802.11 direct sequence devices (that
operate at 1 or 2 Mbits/sec). Available Frequency Channels vary by regulatory domain and/or country. See
details.
Also in 1999, the IEEE modified the 802.11 standard to support devices operating in the 5 GHz frequency band. This standard is referred to
as 802.11a. 802.11a devices are not compatible with 2.4 GHz 802.11 or 802.11b devices. 802.11a radios use a radio technology called
Orthogonal Frequency Division Multiplexing (OFDM) to achieve data rates of up to 54 Mbits/sec. Available Frequency Channels vary by
regulatory domain and/or country. See
In 2003, the IEEE introduced the 802.11g standard. 802.11g devices operate in the 2.4 GHz frequency band using OFDM to achieve data
rates of up to 54 Mbits/sec. In addition, 802.11g devices are backwards compatible with 802.11b devices. Available Frequency Channels vary
by regulatory domain and/or country. See

Management and Monitoring Capabilities

There are several management and monitoring interfaces available to the network administrator to configure and manage an AP on the
network:
•

HTTP/HTTPS Interface

•

Command Line Interface

• SNMP Management
• SSH (Secure Shell) Management
HTTP/HTTPS Interface
The HTTP Interface (Web browser Interface) provides easy access to configuration settings and network statistics from any computer on the
network. You can access the HTTP Interface over your LAN (switch, hub, etc.), over the Internet, or with a "crossover" Ethernet cable
connected directly to your computer's Ethernet Port.
HTTPS provides an HTTP connection over a Secure Socket Layer. HTTPS is one of three available secure management options on the AP;
the other secure management options are SNMPv3 and SSH. Enabling HTTPS allows the user to access the AP in a secure fashion using
Secure Socket Layer (SSL) over port 443. The AP supports SSLv3 with a 128-bit encryption certificate maintained by the AP for secure
communications between the AP and the HTTP client. All communications are encrypted using the server and the client-side certificate.
The AP comes pre-installed with all required SSL files: default certificate, private key and SSL Certificate Passphrase installed.
Command Line Interface
The Command Line Interface (CLI) is a text-based configuration utility that supports a set of keyboard commands and parameters to
configure and manage an AP.
Users enter Command Statements, composed of CLI Commands and their associated parameters. Statements may be issued from the
keyboard for real time control, or from scripts that automate configuration.
For example, when downloading a file, administrators enter the download CLI Command along with IP Address, file name, and file type
parameters.
You access the CLI over a HyperTerminal serial connection or via Telnet. During initial configuration, you can use the CLI over a serial port
connection to configure an Access Point's IP address. When accessing the CLI via Telnet, you can communicate with the Access Point from
over your LAN (switch, hub, etc.), from over the Internet, or with a "crossover" Ethernet cable connected directly to your computer's Ethernet
Port. See Using the Command Line Interface (CLI)
802.11a Channel Frequencies
802.11g Channel Frequencies
for more information on the CLI and for a list of CLI commands and parameters.
for details.
for details.
AP-4000 User Guide
802.11b Channel Frequencies for
15