6. When n-29 in "" or CIDR notation, how many valid IPs are available to be assigned to individual network interfaces? a. 32 b. 16 c. 4 e. 7. The network service based on Address Resolution Protocol (ARP) provides a. Layer 3 to layer 2 mapping b. Layer 2 to layer 1 mapping c. Layer 3 to layer 1 mapping d. Layer 2 to layer 3 mapping e. None of above 8. Which layer does DNS protocol belong to? a. Network layer b. Application layer c. Transport layer d. Data link layer e. Session layer 9. Which layer does DHCP protocol belong to? a. b. c. d. e. Network layer Application layer Transport layer Data link layer Session layer 10. If we set up a DNS server for the domainit.ilstu.edu, we need register this DNS server to the server responsible for the domain: a. .ilstu edu b. edu c. DNS root servers d. ICANN e. All of the above