256
(each number is the square of the preceding number)
Ports are described by 16 bits. 2^16 is 65536 so the highest number is 65535 and port 65536 does not exist.
The sequence appears to be made up of the squares of consecutive integers: (1^2 = 1), (4^2 = 16), and (10^2 = 100). The missing number corresponds to (7^2), which is (49). Therefore, the missing number in the sequence is 49.
49
The sequence consists of perfect squares: (3^2 = 9), (4^2 = 16), (5^2 = 25), and (7^2 = 49). The missing number corresponds to (6^2), which is 36. Therefore, the missing number in the sequence is 36.
65536
65536 virtual ports. Port number is a 16 bit number, so there are 2^16 (65536) ports for a NAT router.
2^16-1= 65536
To find the missing number in the sequence 16, 4, 12, 36, 9, 27, 44, 11, we can look for a pattern. The first set of numbers appears to alternate between two sequences: the first sequence (16, 12, 9, 44) and the second sequence (4, 36, 27, 11). Following this pattern, the missing number, which follows the last number in the second sequence (11), should be 33. Thus, the missing number is 33.
You could put 49 in between the 16 and the 100.
16
c) 17
9 (between 8 and 16).