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.
A common sand flea found in North America is the long horned sand flea. Long horned sand fleas are most often found on the Atlantic coast of North America. They remain buried in the sand during the day and forage for food at night. Sand fleas prefer to feed on people with pale skin as it easier to pierce.