1. Which of the following layer is responsible for providing end-to-end network reachability? a. b. c. d. e. Physical layer Data link layer Network layer Transport layer Application layer 2. Which organization is in charge of IP address assignment? a. ISO c. IETF d. ICANN e. ITU 3. Which of the following information in IP header is irrelevant to IP fragmentation? a. Identification b. IP flag bit D c. IP flag bit M d. Fragment Offset e. Type of Service (IoS) 4. Which of the following information in a data frame will never be changed during network transmission from a source to destination host? a. b. C. d. e. Source MAC address Destination MAC address Source TF address Destination IP address All of the above will be changed 5. Routing decision is based on: a. Source IP address b. Destination IP address c. Source MAC address d. Destination MAC address e. Routing protocols