An IP Gateway is needed to provide the communications between your computer and the World Wide Web. A Network Switch can send the data, or packets, to the intended computer because of the capabilities of an IP Gateway Router.
What is a Sea Flea? There is much confusion about what people mean when they refer to a sea flea. While there is a marine creature of the Leptostraca family found in the waters around Australia that is called a sea flea, more often the term is actually used to describe the jellyfish larvae that can make sea bathers break out is a rash.
What are fleas? Fleas are small insects about 1-2 mm in length. Adult fleas live in the coat and bedding of dogs, cats and other animals and feed on their blood. The female adult lays eggs (up to 500 per flea per day!) which roll off the animal into the environment, and then hatch into larvae.