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User Manual for the NETGEAR 10/100/1000 Mbps CardBus Adapter GA511

CardBus Support

CardBus is a 32-bit bus-mastering architecture that operates at PCI local-bus speeds of up to 33 MHz, yielding a peak bandwidth of 132 MB/sec. Unlike 16-bit PC Cards, which operate at slower ISA bus speeds of 8 MHz using an ISA-like asynchronous protocol, CardBus provides a fast 32-bit multiplexed address/data path that allows full access to gigabit Ethernet's bandwidth.

By utilizing internal bus speeds, CardBus can operate at speeds six times faster than a 16-bit PC Card and five times faster than a 100 Mbps PC Card. In addition, CardBus PC cards operate at 3.3 Volts, saving power and conserving your PC's battery life.

Bus-Mastering Capability

Model GA511 features leading-edge bus-mastering capabilities to optimize throughput while maintaining low CPU utilization. Bus mastering allows the GA511 to assume control of your PC's system bus, accelerating data transfers. 16-bit PC Cards, by comparison, act as a bus slave and pass data through the CPU before sending it to the host system. This slows data transfers and strain your PC's processor.

Frame Priority Tagging for Virtual LANs

The GA511 is 802.1Q/1p-compliant for frame priority tagging. The IEEE 802.1Q standard defines the operation of Virtual LAN (VLAN) bridges that permit the definition, operation and

administration of VLAN topologies within a bridged LAN infrastructure. Using the GA511 with 802.1p-compliant switches or routers offers a range of traffic prioritization of Layer 2 frames, providing a higher quality of service on high-speed local area networks.

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Introduction