1.5.3 Practice Questions

What is the binary format for the following decimal IP address? 131.9.202.111

10000011.00001001.11001010.01101111 10000011.00001001.11001010.01101111 is the binary format of this address. To convert binary to decimal, remember the following numbers: 128, 64, 32, 16, 8, 4, 2, 1 Each number represents the decimal value for a binary 1 in the corresponding position. For example, 10000000 is equal to 128, and 00010000 is equal to 16. To find the binary form of a decimal number, try to subtract each decimal value from the value in the octet. For example, for 131, you can subtract 128 leaving a remainder of 3. You can then subtract 2, and then 1. For each number you can subtract, write a 1 in the address's binary position.

Match each decimal value on the left with the corresponding hexadecimal value on the right. Not all decimal values have a corresponding hexadecimal value.

11 - 17 B - 11 D - 13 F - 15 C - 12 10 - 16 Hexadecimal is a Base 16 numbering system, which means there are 16 characters possible for each number place. These characters go from 0 to 9, as decimal does; however, hexadecimal uses the letter A to represent the decimal number 10, B represents 11, and so on up to F, which represents 15. The easiest way to convert between decimal and hexadecimal is to memorize the corresponding values for each hexadecimal number using the following tables.

What is the decimal format of the following binary IP address? 11001110.00111010.10101010.01000011

206.58.170.67 206.58.170.67 is the decimal form of the IP address. To convert binary to decimal, remember the following numbers: 128, 64, 32, 16, 8, 4, 2, 1 Each number represents the decimal value for a binary 1 in the corresponding position. For example, 10000000 is equal to 128, and 00010000 is equal to 16. To find the decimal form of a binary number, add up each decimal equivalent for each 1 bit in the address. For example, the equation for the number 11001110 is128 + 64 + 8 + 4 + 2 = 206.