By any measure, Cisco dominates the market for enterprise data network equipment.
Nobody argues that fact.
But the landscape is changing, with talk of adding voice to data nets and an emphasis on professional services to help users make sense of it all. At the same time, Cisco is trying to mount a credible assault on the carrier equipment market, which many prognosticators, not to mention Cisco itself, consider essential for the company's growth. So in the struggle to retain its spot atop the network equipment market, it's really Cisco vs. everybody else, most notably Nortel Networks, Lucent Technologies and 3Com. This bunch includes Foundry Networks, Juniper Networks, Redback Networks and Sycamore Networks. Not likely, but that doesn't mean these competitors won't enjoy success of their own.