1. The Intemet is made of: (a) Network edge: hosts and applications (b) Access network and physical media: wired, wireless communication links (c) Network core: interconnected routers, network of networks (d) All of above 2. Which of the following is true? (a) TDM and FDM are examples of packet switching (b) Packet switching uses "store and forward" to deliver packets from source to destination (c) Circuit Switching generally utilizes network resources better than packet switching (d) Packet switching allocates resources for a network applications, thus it is ideal for supporting real- time (e.g. voice) communications on the Internet 3. Which of the following about client-server architecture is false? (a) Client sends request to server that provides service and replies with response (b) Both server and client must be always-on (c) Clients do not communicate directly with each other (d) HTTP is a client-server based application protocol 4. Which of the following about HTTP is false? (a) It stands for hypertext transfer protocol (b) Client sends HTTP request to server that replies with HTTP response (c) It is designed to be stateful. That is, Web servers keep state information about clients. (d) HTTP can be used for applications other than web browsing. An example is Web-based email. 5. Suppose there is exactly one packet switch between a sending host and a receiving host. The transmission rate between the sending host and the router and between the router end receiving host is R (ie. the same). Assuming that the router uses store-and-forward packet switching what the total end- to-end delay to send a packet of length L? (Ignore queuing, propagation delay, and packet processing) (a) UR (b) 2L/R (c) L/2R (d) R/L 3.