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e600_Binary
CCNA_Binary
| Question | Answer |
|---|---|
| 194 in binary | 11000010 |
| 85 in binary | 01010101 |
| 200 in binary | 11001000 |
| class A range | 1.0.0.1 to 126.255.255.254 |
| class B range | 128.0.0.1 to 191.255.255.254 |
| Class C range | 192.0.1.1 to 223.255.254.254 |
| class A reserved | 10.0.0.0 to 10.255.255.255 |
| 68 | 01000100 |
| 219 | 11011011 |
| 39 | 00100111 |
| 245 | 11110101 |
| 245.227.45.235 | 11110101 11100011 00101101 11101011 |
| You’re working with the network 172.18.0.0. You have determined you will need 24 subnets. What is the appropriate subnet mask? | For 24 subnets, you’ll need 5 subnet bits, which gives you 30 valid subnets. The default mask for this network is 255.255.0.0. Borrow five host bits for subnetting and you have a subnet mask of 255.255.248.0. |
| You’re working with the network 10.0.0.0. You have determined you will need 46 subnets. What is the appropriate subnet mask? | Borrow six host bits for subnetting and you have a subnet mask of 255.252.0.0 |
| You’re working with the network 212.18.234.0. You have determined you will need seven subnets. What is the appropriate subnet mask? | The default mask for this network is 255.255.255.0. Borrow four host bits for subnetting and you have a subnet mask of 255.255.255.240 |
| You’re working with the network 78.0.0.0. You have determined you will need 164 subnets. What is the appropriate subnet mask? | The default network mask is 255.0.0.0. Borrow eight host bits for subnetting and you have a subnet mask of 255.255.0.0 |
| What is the dotted decimal equivalent 01110001 00111100 01110101 11110010 | 113.60.101.242 |
| 11001001 01000101 01000111 001111111 | 201.69.71.63 |
| 11111110 01010011 11111100 01001010 | 254.83.252.74 |
| 11000101 00110011 11001111 00111100 | 197.51.207.60 |
| 11111000 00001111 01000101 11111001 | 248.15.67.249 |
| 11001010 11110000 00001111 00000001 | 202.240.15.1 |
| 11100000 00000111 01000101 00010010 | 224.7.69.18 |
| 11000101 11000111 00111000 00000000 | 197.199.56.0 |
| 00000011 00100010 01101111 11111100 | 3.34.111.252 |
| 00111111 00100101 11111111 00010100 | 63.37.255.20 |
| 00000100 00101010 11000010 00100101 | 4.44.194.41 |
| 11110011 00111111 11000100 00111111 | 243.63.196.62 |
| 100.10.1.145 | 01100100 00001010 00000001 10010001 |
| 245.39.145.29 | 11110101 00100111 10010001 00011101 |
| 45.190.234.18 | 00101101 10111110 11101010 00010010 |
| 251.10.1.245 | 11111011 00001010 00000001 11110101 |
| 10.235.231.97 | 00001010 11101011 11100111 01100001 |
| How many valid subnets exist on the 10.0.0.0 /11 network? | 6 valid subnets |
| How many valid subnets exist on the 200.45.45.0 /27 network? | 6 valid subnets |
| How many valid subnets exist on the 190.45.45.0 /25 network? | 510 valid subnets |
| How many valid subnets exist in the 200.10.10.0 /29 network? | 30 valid subnets |
| How many valid subnets exist in the 20.0.0.0 /14 network? | 62 valid subnets |
| How many valid subnets exist in the 156.15.0.0 /27 network? | 2046 valid subnets |
| How many valid subnets exist in the 193.10.1.0 /30 network? | 62 valid subnets |
| How many valid hosts are there in the 200.10.1.0 /27 subnet? | 30 valid hosts |
| How many valid hosts are there in the 150.10.0.0 /20 subnet? | 4194 valid hosts |
| How many valid hosts are there in the 47.0.0.0 /28 subnet? | 14 valid hosts |
| How many valid hosts are there in the 245.17.89.0 /29 subnet? | 6 valid hosts |
| How many valid hosts are there in the 235.23.12.0 /30 subnet? | 2 valid hosts. |
| Is a subnet mask of 255.255.255.254 valid? | No. This would leave only one host bit, which would result in no valid host addresses |
| Is a subnet mask of 255.255.254.0 valid? | Yes. The presence of a “254” in the subnet mask doesn’t mean the mask cannot be used, unless the 254 is the final octet of the mask (255.255.255.254) |
| Given an IP address and its subnet mask, how do you determine the subnet the address can be found on? | Convert the address and the mask to binary. Perform a Boolean AND. Convert the Boolean AND result to dotted decimal. This yields the subnet the IP address can be found on. |
| On what subnet does the IP address 200.1.1.20 /28 reside on? | The subnet is 200.1.1.16 /28 |
| On what subnet does the IP address 217.39.58.200 /25 reside? | The subnet is 217.39.58.128 /25. |
| On what subnet does the IP address 143.29.14.118 / 22 reside? | The subnet is 143.29.12.0 /22. |
| On what subnet does the IP address 209.48.200.200 /26 reside? | The subnet is 209.48.200.192 /26. |
| On what subnet does the IP address 100.1.1.6 /30 reside? | The subnet is 100.1.1.4 /30. |
| On what subnet does the IP address 123.56.78.126 /23 reside? | The subnet is 123.56.78.0 /23. |
| On what subnet does the IP address 248.234.10.27 /28 reside? | The subnet is 248.234.10.16 /28. |
| What is the broadcast address for the subnet 200.100.10.16 /28? | The broadcast address for this subnet is 200.100.10.31. |
| What is the broadcast address for the subnet 100.1.14.32 /27 ? | The broadcast address for this subnet is 100.1.14.63. |
| What is the broadcast address for the subnet 56.10.200.8 /30? | The broadcast address for this subnet is 56.10.200.11. |
| What is the broadcast address for the subnet 109.83.23.128 /26? | The broadcast address is 109.83.23.191. |
| What is the broadcast address for the subnet 90.87.18.0 /23? | The broadcast address is 90.87.19.255. |
| What is the broadcast address for the subnet 199.90.200.96 /27? | The broadcast address is 199.90.200.127. |
| What is the broadcast address for the subnet where the address 189.90.94.25 /28 can be found? | The broadcast address for this subnet is 189.90.94.31. |
| What is the broadcast address for the subnet where the address 10.4.200.67 /26 can be found? | What is the broadcast address for the subnet where the address 10.4.200.67 /26 can be found? |
| What is the broadcast address for the subnet where the address 251.12.79.14 /30 can be found? | The broadcast address for this subnet is 215.12.79.15. |
| What is the range of valid host addresses in the subnet 189.57.34.64 /26? | Subnet Address: 189.57.34.64. Broadcast address: 189.57.34.127. Valid range of host addresses: 189.57.34.65 – 189.57.34.126. |
| True or False: By default, a Class B address has 16 network bits and 16 host bits. | Answer: True. |
| True or False: When configuring subnetting, the subnet bits are borrowed from the network bits. | Answer: False. Subnet bits are borrowed from the host bits. The number of network bits stays the same. |
| True or False: When configuring subnetting, the "all-ones" subnet an "all-zeroes" subnets are considered unusable. | Answer: True. Technically, they can be used, but Cisco discourages their use. For exam purposes, consider these networks unusable. |
| True or False: When configuring subnetting, the "all-ones" host address is considered usable as a host address, but the "all-zeroes" host address is not. | Answer: False. The "all-ones" host address is the broadcast address, while the "all-zeroes" host address is the subnet address itself. |
| True or False: Someone mentions the subnet mask "slash nine". In dotted decimal, this is a mask of 255.128.0.0. | Answer: True. "slash nine" refers to a mask of /9, which means the first nine bits of the mask are ones, and the rest are zeroes. In binary, that's 11111111 10000000 00000000 00000000; in dotted decimal, that's 255.128.0.0. |
| What is the valid range of host addresses in the subnet 190.45.224.4 /30 subnet? | Subnet address: 190.45.224.4. Broadcast address: 190.45.224.7. Valid range of host addresses: 190.45.224.5 – 6 |
| What is the valid range of host addresses in the subnet 244.18.25.0 /25? | Subnet address: 244.18.25.0. Broadcast address: 244.18.255.127. Valid range of host addresses: 244.18.25.1 – 126 |
| What is the valid range of host addresses in the 109.87.35.24 /29 subnet? | Subnet address: 109.87.35.24. Broadcast address: 109.87.35.31. Valid range of host addresses: 109.87.35.25 – 30 |
| What is the valid range of host addresses in the 41.29.87.0 /28 subnet? | Subnet address: 41.29.87.0. Broadcast address: 41.29.87.15. Valid range of host addresses: 41.29.87.1 – 14 |
| You are working with network 130.10.0.0. Your network plan calls for a minimum of 150 subnets, but no more than 400. What is the appropriate subnet mask? | The subnet mask is 255.255.255.0 |
| You are working with network 10.0.0.0. Your network plan calls for a minimum of 30 subnets, but you must not have more than 35. What is the appropriate subnet mask? | The final subnet mask is 255.248.0.0 |
| You are working with network 210.45.10.0. Your network plan calls for at least 10 subnets, but not more than 20. What is the appropriate subnet mask? | The final subnet mask is 255.255.255.240 |
| You are working with network 199.20.14.0. Your network plan calls for at least 60 subnets. Can this be done? If so, what is the appropriate subnet mask? | The final subnet mask is 255.255.255.252. |
| You are working with network 215.18.20.0. Your network plan calls for at least 150 subnets. Can this be done? If so, what is the appropriate subnet mask? | This is a Class C network. The default mask is 255.255.255.0. For at least 150 subnets, seven subnet bits would be needed. This would leave only one host bit, an invalid configuration. Never attempt to use a subnet mask of /31 or 255.255.255.254. |
| You are working with network 17.0.0.0. You want to allow for 1000 hosts, but no more than 1100. What is the appropriate subnet mask? | The final subnet mask is 255.255.252.0. |
| You are working with network 150.45.0.0. You want to allow for 60 hosts, but not more than 100. What is the appropriate subnet mask? | The final subnet mask is 255.255.255.192 |
| You are working with network 217.28.100.0. You want to allow for a minimum of 25 hosts and a maximum of 30. What is the appropriate subnet mask? | The final subnet mask is 255.255.255.248 |
| Is it possible to configure a valid subnet mask that allows only a single valid IP address? | No. Such a mask would appear as 255.255.255.254, or /31. Never attempt to use such a mask. |
| You are working with network 182.10.0.0. You want to allow for at least 250 subnets, but no subnet must allow more than 130 hosts. What is the appropriate subnet mask? | Eight borrowed subnet bits would yield enough subnets but it would also leave eight host bits, yielding 254 hosts, violating the requirement. Nine subnet bits would give you 510 subnets and only 126 hosts.This results in a subnet mask of255.255.255.128 |
| You are working with network 220.10.15.0. You want to allow for at least 29 hosts per subnet, but you must never have more than three subnets. What is the appropriate mask? | Five host bits would result in enough valid hosts. but would leave three subnet bits, which allows six subnets, violating the requirement. Using two subnet bits meets both requirements, and results in a mask of 255.255.255.192 |
| You are working with network 17.0.0.0. You want to allow for at least 1000 subnets. No subnet should ever have more than 1025 hosts. What is the appropriate mask? | Using the middle 14 bits for the subnets meets the requirement. This results in a subnet mask of 255.255.252.0. |
| Is a subnet mask of 255.255.254.0 valid? | Yes. This is simply a /23 mask, or “slash twenty-three”. There is no problem with a “254” in any octet except the final one. 255.255.254.0 is fine; 255.255.255.254 is not |
| You are working with network 150.5.0.0. Your network manager asks you to come up with a subnetting scheme that will allow for at least 750 subnets, and at least 57 hosts per segment. What subnet mask will you use? | The final mask is 255.255.255.192 |
| You are working with network 220.90.253.0. Your network manager has asked you to come up with a subnetting scheme that allows for no more than 14 subnets, and no more than 14 users per subnet. What subnet mask will you use? | The subnet mask is 255.255.255.240. |
| 75 | 01001011 |
| 120 | 01111000 |
| 42 | 00101010 |
| class b reserved range | 172.16.0.0 to 172.31.255.255 |
| class c reserved range | 192.168.0.0 to 192.168.255.255 |
| 89 | 01011001 |
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