104 CHAPTER 6 TCP/IP and Routing also covered the use of protocol ports and the importance of them. You must memorize these port assignments for the Network+ exam. Top Five Toughest Questions 1. You have been given an IP address in binary form. The address you have been given is 11000000.00000000.00000000.00000001. What is this IP address in decimal form? A. 127.0.0.1 B. 191.0.0.1 C. 137.0.0.1 D. 192.0.0.1 2. You have been asked to explain what a certain IP address is used for. The IP address is 224.0.0.1. What are addresses in the 224.0.0.0 range used for? A. SNMP B. HTTP C. POP3 D. Multicasting 3. You have a user who cannot get connected to the internet. You have the user run IPCONFIG/ALL and he reads you the IP address of 169.254.1.3. What is wrong with this system? A. System has a static IP address B. System has an APIPA address C. System has a bad address D. System has a classless address 4. A user has been given an IP address of 192.168.1.1 with a subnet mask of 255.255.255.0. How would you express the subnet mask for this address using CIDR notation? A. /24 B. /8 C. /16 D. /22 5. A user has been given an address of fe80::9c5f:9695:f235:0051. What kind of address has she been given? A. IPV4 address B. IPV6 address C. MAC address D. Globally Unique Identifier (GUID)