(Cisco——the leader of the security industry, the development trend of the security business Cisco's position and advantages in the industry Cisco's security architecture Cisco covers almost all security sub-businesses; It has an absolute advantage; Ironport, which Cisco bought for $830 million in early 2007, mainly focuses on email security and page filtering business, and is in a leading position. The trend of security business - industry is combined with one-stop solution needs of accustomed users)