Chapter 4

2 points for Option 4 In an 8 bit binary number, what is the total number of combinations of the eight bits? 128 254 255 256 512 1024 2 points for Option 4 Convert the decimal number 231 into its binary equivalent. Select the correct answer from the list below. 11110010 11011011 11110110 11100111 11100101 11101110 How many usable hosts are available given a Class C IP address with the default subnet mask? 254 255 256 510 511 512 2 points for Option 1 What is the network broadcast address for a Class C address of 192.168.32.0 with the default subnet mask? 192.168.0.0 192.168.0.255 192.168.32.0 192.168.32.254 192.168.32.255 2 points for Option 5 Company XYZ uses a network address of 192.168.4.0. It uses the mask of 255.255.255.224 to create subnets. What is the maximum number of usable hosts in each subnet? 6 14 30 62 2 points for Option 3 Which IPv4 class provides the highest number of host addresses per network? Class A Class B Class C Class D Class E 2 points for Option 1 Which IPv4 class of addresses provides the most networks? Class A Class B Class C Class D Class E 2 points for Option 3 Which statement accurately describes public IP addresses? Public addresses cannot be used within a private network. Public IP addresses must be unique across the entire Internet. Public addresses can be duplicated only within a local network. Public IP addresses are only required to be unique within the local network. Network administrators are free to select any public addresses to use for network devices that access the Internet. 2 points for Option 2 Refer to the exhibit. Host A is connected to the LAN, but it cannot get access to any resources on the Internet. The configuration of the host is shown in the exhibit. What could be the cause of the problem? The host subnet mask is incorrect. The default gateway is a network address. The default gateway is a broadcast address. The default gateway is on a different subnet from the host. 2 points for Option 4 What are two reasons that NAT was developed? (Choose two.) to preserve registered public IP addresses to allow users on the public Internet to access local networks to provide a method for privately addressed LANs to participate in the Internet to make routing protocols operate more efficiently to allow private addresses to be routed on the public Internet to reduce overhead and CPU usage on gateway routers Option 1 and Option 3 are correct. IPv6 increases the IP address size from 32 bits to how many bits? 64 96 128 192 256 512 2 points for Option 3 What is the range of the first octet in a Class B address? 127 to 191 127 to 192 128 to 191 128 to 192 2 points for Option 3 Which two statements describe classful IP addresses? (Choose two.) It is possible to determine which class an address belongs to by reading the first bit. The number of bits used to identify the hosts is fixed by the class of the network. Only Class A addresses can be represented by high-order bits 100. Up to 24 bits can make up the host portion of a Class C address. All subnets in a network are the same size. Three of the five classes of addresses are reserved for multicasts and experimental use. Option 2 and Option 5 are correct. Which statement describes NAT overload or PAT? Each internal address is dynamically translated to an individual external IP address. A single internal address is always translated to the same unique external IP address. Many internal addresses can be translated to a single IP address using different port assignments. Many internal addresses are statically assigned a single IP address and port to use for communications. 2 points for Option 3 What must happen for a privately addressed host on an inside local network to be able to communicate with an outside destination host on the Internet? The host IP address must be translated to an outside private address. The host IP address must be translated to an inside local address. The host IP address must be translated to an outside local address. The host IP address must be translated to an inside global address. 2 points for Option 4 Which option shows the proper notation for an IPv6 address? 2001,0db8,3c55,0015,abcd,ff13 2001-0db8-3c55-0015-abcd-ff13 2001.0db8.3c55.0015.abcd.ff13 2001:0db8:3c55:0015::abcd:ff13 2 points for Option 4 Refer to the exhibit. Which range of IP addresses would allow hosts that are connected to the Router1 Fa0/0 interface to access outside networks? 192.168.1.0 through 192.168.1.95 192.168.1.66 through 192.168.1.94 192.168.1.66 through 192.168.1.96 192.168.1.0 through 192.168.1.127 192.168.1.66 through 192.168.1.128 2 points for Option 1 Refer to the exhibit. Which range of IP addresses would allow hosts that are connected to the Router1 Fa0/0 interface to access outside networks? 192.168.1.0 through 192.168.1.95 192.168.1.66 through 192.168.1.94 192.168.1.66 through 192.168.1.96 192.168.1.0 through 192.168.1.127 192.168.1.66 through 192.168.1.128 2 points for Option 2 Static NAT works by mapping a specific inside local IP address to what other specific address type? inside global outside local outside global private IP address Which port numbers are used by PAT to create unique global addresses? 255 and below 1023 and below 1024 and above 64,000 and above 2 points for Option 3 Refer to the exhibit. R1 is performing NAT for the 10.1.1.0/24 inside network. HostA has sent a request to the web server. What is the destination IP address of the return packet from the web server? 10.1.1.2 172.30.20.1 172.30.20.10 192.168.1.1 2 points for Option 3