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length is 1500 bytes, and now the IP packet length is 5000 bytes. Therefore, IP packets must be split into four packets. Because each package has its own IP header (20 bytes), the length of the IP packets for the four packets is 1500, 1500, 1500, 560, respectively.8 Server-side responseAfter the forwarding of multiple gateways, Google's server 172.194.72.105, received the four Ethernet packets.According to the IP header number, Google put four packages together, take out the full TCP packet, an

. Delete a table#按道理来说, a department in the department table was deleted, and the associated records for the employee table were deleted successively.However, after you delete the records for the employee table, delete the current department without any problemsThe above Delete table record operation is more cumbersome, according to the truth, cut off a department, the staff of the department will be cut off. In fact, there is a very important element in the construction of the table,Call sync D