Short answer 25. If the host part of the IP address is all 1, it indicates the broadcast address; if the host part of the IP address is all 0, it indicates the (----) address.

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26. Host A continuously sends two TCP segments to host B, with sequence numbers of 70 and 100 respectively. Question:

(1) How many bytes of data does the first segment carry?

(2) What should be the acknowledgement number in the confirmation message sent back by host B after receiving the first segment?

(3) If the acknowledgement number in the confirmation message sent back by B after receiving the second segment is 180, how many bytes of data in the second segment sent by A?

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