Question two: write down what best describe the following 1. an infrastructure that provides services to applications 2. Which layer do internet protocols like HTTP, FTP and DNS belong to? 3. What is the name for a uniquely identifiable endpoint of a connection? 5. defines the format and the order of messages exchanged use store-and-forward transmission at the inputs to the links. has two types: primitives ,parameter .. and communication between layer in the same system. 7. After a collesion occure CSMA/CD send a frame. 8. What information uniquely identifiable endpoint of a connection consist of? It is a system for sending messages to other computer users based on e-mail addresses. 10. allow many devices to share the same media. 11. A string of characters that holds some information about the client and must be returned to the server untouched. 12. The function of works as network translator 13. Which layer do internet protocols like HTTP, FTP and DNS belong to? 14. a collection of computer networks interconnected together