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First question: Grade 26 1. 2. 3. 4. 5. 6. 7. Which field in IPv4 determines the size of options field? What is the first address of a block of classless addresses if one of the addresses is 44.23.3.51/12? What is the last address of a block of classless addresses if one of the addresses is 82.7.180.37/11? What is the first address of a block of classless addresses if one of the addresses is 61.126.68.18/7? What is the last address of a block of classless addresses if one of the addresses is 120.73.68.117/19? The entire address block for class B contains addresses, which is of IPv4 address space. An organization is granted a block; one address is 10.10.10.33/17. The organization needs 42 subnets. What is the subnet prefix length? An organization is granted a block: one address is 100.73.11.53/21. If the subnet prefix length is/27, what is the maximum number of subnets? The minimum number of colons in an IPv6 address is and the maximum number of colons in an IPv6 address is The number of blocks in class Dis and class D block size is 8. 9. 10