Both TCP and UDP use 1’s complement for their checksum values: a. Suppose that you have the following 8-bit bytes: 01010101, 01110000, and 01001100. Calculate the 1’s complement of the sum of all of these 8-bit bytes (that is, add them all together and then determine the 1’s complement from that sum), being sure to handle the overflow as described in the text in a circular fashion. Note that TCP and UDP use 16-bit words in computing the checksum, but only 8-bits are used here for simplicity. b. Is it possible that a 1-bit error will go undetected by the checksum? If yes, explicitly state how this can happen. c. Is it possible that a 2-bit error will go undetected by the checksum? If yes, explicitly state how this can happen.

An endless cycle of creation and response on the internet is called

1. the program must provide following functions to extract some statistics. note that the data_list parameter specified in these functions may be the same for all functions or different for different functions—that is your choice. a skeleton file is provided on mirmir. a) open_file()prompts the user to enter a year number for the data file. the program will check whether the year is between 1990 and 2015 (both inclusive). if year number is valid, the program will try to open data file with file name ‘year.txt’, where is the year. appropriate error message should be shown if the data file cannot be opened or if the year number is invalid. this function will loop until it receives proper input and successfully opens the file. it returns a file pointer and year. i. hint: use string concatenation to construct the file name b) read_file(fp)has one parameter, a file pointer read. this function returns a list of your choosing containing data you need for other parts of this project. c) find_average(data_list) takes a list of data (of some organization of your choosing) and returns the average salary. the function does not print anything. hints: i. this is not the average of the last column of data. it is not mathematically valid to find an average by finding the average of averages—for example, in this case there are many more in the lowest category than in the highest category. ii. how many wage earners are considered in finding the average (denominator)

The salespeople at hyperactive media sales all use laptop computers so they can take data with them on the road. you are a salesperson for superduper lightspeed computers talking to hyperactive media sales about upgrading the laptops to windows 10. explain how network location awareness in windows 10 would make the laptops more secure.