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A few mouse clicks enable the Cisco recommended security , availability , and QoS features without the need to consult a detailed design guide . Next the attacker could install a piece of software that runs on the target host and executes unwanted functions ( trojan ) . It also can be used to limit the total number of devices plugged into a switch port , thereby protecting the switch from a MAC flooding attack as well as reducing the risks of rogue wireless access points or hubs . Monster , on the other hand , could claim greater diversity , an easier to learn interface , and a greater likelihood of catching fish from other ponds . Aggregating servers into separate functional layers further bolsters resiliency in this design model .