Assignment 1 1.1 2 points Why are beginning and end ending of a frame marked with flags, instead of just sending the length of the frame in the beginning? 1.2 2 points What are stuffing bits? What are they used for? How would the 2 byte sequence 1011 1111 1111 0010 be transmitted with stuffing bits, if 0111 1110 is used as a flag (like in the lecture slides)? 1.3 3 points What are the two general cases of treating errors in transmitted data? How do they work? 1.4 3 points What is the Hamming distance between two code words? What is the Hamming distance of a code? How many correction bits are necessary for a code with Hamming distance 3 and messages with m bits payload? 1.5 3 points Consider the 2 byte sequence 1011 1111 1111 0010, that should be transmitted over a network. How would this sequence looks like if a parity bit with an even parity is added after every byte? How many errors can be detected and how many corrected using this approach