802.11B/G Compared To 802.11A Networks; Feature List - HP ProCurve 520wl User Manual

802.11b/g compared to 802.11a Networks

The 520wl supports 802.11 wireless connectivity through the use of 802.11a-compliant 5 GHz, 802.11b-compliant 2.4
GHz, and 802.11g-compliant 2.4 GHz radio technology. The IEEE 802.11a standard adds support for a high-speed
wireless physical layer in the 5 GHz band using Orthogonal Frequency Division Multiplexing (OFDM). The standard
requires support for data rates of 6, 12, 24, and 54 Mbps. The 520wl supports the following data rates: 1, 2, 5.5, 11, 6,
9, 12, 18, 24, 36, 48, 54 Mbits/s. The IEEE 802.11b standard supports wireless physical layer in the 2.4 GHz band
using Direct Sequence Spread Spectrum (DSSS). The standard provides for data rates of 1, 2, 5.5, and 11 Mbits/s.
The new IEEE 802.11g standard adds support for a high-speed wireless physical layer in the 2.4 GHz band using
Orthogonal Frequency Division Multiplexing (OFDM). The standard requires support for data rates of 6, 9, 12, 18, 24,
36, 48, and 54 Mbps.
The 520wl can be used with any combination of 802.11a, 802.11b, and 802.11g AP Cards. You can have an 802.11a
and an 802.11b or 802.11g card present in the 520wl at the same time and 2.4 GHz and 5 GHz clients will be
supported simultaneously. Note however that only one 802.11a card with antenna adapter can be plugged into the
520wl at one time.

Feature List

The IEEE standards that govern wireless communications are different for the 2.4 GHz band and the 5 GHz band. The
table below compares the software features supported for each type of card in the 520wl:
Feature
Number of stations per AP
HTTP/HTTPS Server
Telnet / CLI
SNMP/SNMPv3 support
VLAN Support (16 User VLANs)
Emergency Reset to Default
Configuration
DHCP Client
DHCP Server
TFTP
RADIUS Mac-based Access Control
Fallback to Primary RADIUS Server
RADIUS Session Timeout
RADIUS Multiple MAC Address Formats
RADIUS DNS Host Name Support
RADIUS Start/Stop Accounting
802.1X (EAP-MD5, EAP-TLS and EAP ­
TTLS)
802.1d bridging
MAC Access Control Table
Protocol Filtering
Multicast/Broadcast Storm Filtering
Proxy ARP
Roaming
Link Integrity
Automatic Channel Select
WEP
WEP Plus (Weak Key Avoidance)
WDS Relay
1
Remote Link Test
1
Medium Density Distribution
Distance between APs
2.4 GHz 2.4 GHz
(802.11b) (802.11g)
up to 250 up to 128
yes yes
yes yes
yes yes
no yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
1
yes no
yes yes
yes no
yes no
yes no
5 GHz
(802.11a)
up to 128 This information corresponds to a cas where no
encryption is enabled. For more information about the
number of stations supported when using different types
of encryption, please see the table "Number of Stations
per BSS" located in appendix A.
yes
yes
yes
no
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes Key lengths supported for 802.11b: 64-bit and 128-bit
Key lengths supported for 802.11a and 802.11g: 64-bit,
128-bit, and 152-bit
(Note: Some products refer to 64-bit as "40-bit", 128-bit
as "104-bit", and 152-bit as "128-bit".)
no
yes
no
no
no
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