Question: answer all, that is the full question Question 5 (15 Marks) (a) A regional ISP is granted the following block of addresses: 15.0.0.0/18. The regional

answer all, that is the full question

Question 5 (15 Marks) (a) A regional ISP is granted the following block of addresses: 15.0.0.0/18. The regional ISP has decided to divide this block into 4 equal sub-blocks (0 to 3). Three of these sub-blocks are assigned to three local ISPs. The second block (block no. 1) in the group is reserved for future use. (1) How many addresses does each local ISP get? (11) What is the address of the block reserved for future use? Explain your answers! [4 Marks] (b) The first local ISP subdivides its assigned sub-block into 8 smaller blocks and assigns each block to a smaller ISP. Each small ISP provides services to 128 households (HO, HI, H2, H128) each using 8 addresses. (1) What is the address of the block allocated to household H5 by the second small ISP? (ii) what is the address of the block(s) left un allocated? Explain your answers! [4 Marks] (c) The second Local ISP has subdivided its block into 4 subblocks and assigned the blocks to four large organizations Lorgo. Lorg1, Lorg2. Lorg3). (1) What is the address of the block allocated to Lorg2? (11) What is the range of addresses in the block? Explain your answers! [3 Marks) (d) The third local ISP has divided its block into 16 blocks and assigned each block to a small organization (Sorg1, Sorg2, ....Sorg16) What is the address of the block allocated to Sorg7? (11) What is the range of addresses in the block? Explain your answers! [4 Marks] Question 5 (15 Marks) (a) A regional ISP is granted the following block of addresses: 15.0.0.0/18. The regional ISP has decided to divide this block into 4 equal sub-blocks (0 to 3). Three of these sub-blocks are assigned to three local ISPs. The second block (block no. 1) in the group is reserved for future use. (1) How many addresses does each local ISP get? (11) What is the address of the block reserved for future use? Explain your answers! [4 Marks] (b) The first local ISP subdivides its assigned sub-block into 8 smaller blocks and assigns each block to a smaller ISP. Each small ISP provides services to 128 households (HO, HI, H2, H128) each using 8 addresses. (1) What is the address of the block allocated to household H5 by the second small ISP? (ii) what is the address of the block(s) left un allocated? Explain your answers! [4 Marks] (c) The second Local ISP has subdivided its block into 4 subblocks and assigned the blocks to four large organizations Lorgo. Lorg1, Lorg2. Lorg3). (1) What is the address of the block allocated to Lorg2? (11) What is the range of addresses in the block? Explain your answers! [3 Marks) (d) The third local ISP has divided its block into 16 blocks and assigned each block to a small organization (Sorg1, Sorg2, ....Sorg16) What is the address of the block allocated to Sorg7? (11) What is the range of addresses in the block? Explain your answers! [4 Marks]

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