Exercise regarding to working with IP Addresses

Questions

1.     What are two main components of an IP address?

2.     In  a  block  of  addresses,  we  know  the  IP  address  of  one  host  is 25.34.12.56/16. What is the network address, first address and the last address in the block?

3.     Find the range of address in following blocks.

                                                       I.            17.34.16.0/23

                                                    II.            180.34.64.64/30

                                                 III.            123.56.77.32/29

                                                IV.            200.17.21.128/27

4.     You are given the network address 175.200.0.0; you are required to have 4 subnets. What is the minimum number of Host Bits can you take in to the Network Bits for this purpose? Write down the addresses of 4 subnets.  Write the subnet mask for the network.

5.     An organization is granted the block 16.0.0.0 in class A. The administrator wants to create 500 subnets.

                               I.            Find the subnet mask.

                            II.            Find the number of addresses in each subnet.

                         III.            Find the first and last address in the first subnet.

                        IV.            Find the first and last address in the last subnet.

6.     An organization is granted the block 130.56.0.0 in class B. The administrator wants to create 1024 subnets.

                               I.            Find the subnet mask.

                            II.             Find the number of addresses in each subnet.

                         III.            Find the first and last address in the first subnet.

                        IV.            Find the first and last address in the last subnet (subnet 1024).

7.     An organization is granted the block 211.17.180.0 in class C. The administrator wants to create 32 subnets.

                               I.            Find the subnet mask.

                            II.             Find the number of addresses in each subnet.

                         III.            Find the first and the last address in the first subnet.

                        IV.            Find the first and the last address in the last subnet (subnet 32).

Answers

1.     Network part and Host Part

2.     Network address- 25.34.0.0/16, 

 

1^st address 25.34.00000000.00000001          25.34.0.1/16

Last address 25.34.11111111.11111110         25.34.255.254/16

3.      

                      I.             Subnet mask            

11111111.11111111.11111110.00000000   host part

17.34.00010000.00000001                   17.34.16.1 first address

17.34.00010001.11111110                   17.34.17.254 last address

                     II.            Subnet mask

       11111111.11111111.11111111.11111100   host part

                      180.34.64.11111101                   180.34.64.65 first address

                      180.34.64.11111110                   180.34.64.66 last address

                    III.             Subnet mask            

11111111.11111111.11111111.11111000   host part

123.56.77.00100001                   123.56.77.33 first address

123.56.77.00100110                   123.56.77.38 last address

                     IV.            Subnet mask            

11111111.11111111.11111111.11100000   host part

200.17.21.10000001                   200.17.21.129 first address

200.17.21.10011110                   200.17.21.158 last address

4.           175.200.00000000.00000000

                                                  

        Network part                                               Host part

    175.200.00000000.0                          175.200.0.0/18

    175.200.01000000.0                          175.200.64.0/18

    175.200.10000000.0                          175.200.128.0/18

    175.200.11000000.0                          175.200.192.0/18

5.         

             I.           

       500 subnets, 9 bits should be taken from host part.

          II.           

Number of host bits remain=24-9=15

       III.            First address, first subnet

16.0.0.00000001                      16.0.0.1

               Last address, first subnet

              16.0.01111111.11111110                   16.0.127.254

      IV.            First address, last subnet

            16.11111111.100000000.00000001                     16.255.128.1

             Last address, last subnet

            16.11111111.11111111.11111110                   16.255.1255.254

6.      

             I.           

1024 subnets, 10 bits should be taken from host part.

          II.           

Number of host bits remain=16-10=6

       III.            First address, first subnet

130.56.0.00000001                      130.56.0.1

               Last address, first subnet

              130.56.0.00111110                  130.56.0.62

      IV.             First address, last subnet

130.56.1111111.11000001                      130.56.255.193

             Last address, last subnet

            130.56.1111111.11111110                      130.56.255.254

7.      

             I.           

32 subnets, 5 bits should be taken from host part.

          II.           

Number of host bits remain=8-5=3

       III.             

First address, first subnet

              211.17.180.00000001                      211.17.180.1/29

              Last address, first subnet

                211.17.180.00000110                      211.17.180.6/29

      IV.             First address, last subnet

211.17.180.11111001                      211.17.180.249/29

             Last address, last subnet

211.17.180.11111110                     211.17.180.254/29