In his first week as Cisco Systems' new CEO, Chuck Robbins has already made an impression, moving quickly on plans to create a leaner, faster-moving company out of the networking colossus. Cisco was born in the mid-1980s as a company that made routers, a piece of networking gear that proved to be an essential component of the Internet, which was just then taking off. By the tail end of the dot-com boom in 2000, Cisco briefly was the world's most valuable company with a stock market capitalization of more than $550 billion.