7. A bit string payload, 0111111011111011110, needs to be transmitted at the data link layer. What is the string payload actually transmitted after bit stuffing (not including the starting and ending flag)? (A) 011110111110011111010 (B) 011111010111110011110 (C) 0111110101111100111100 (D) 0111111011111011110 (E) None of the above 8. Suppose that a message payload 1001 1100 1010 0011 is transmitted using Internet Checksum (4-bit word). Internet Checksum is 1's compliment (the l's compliment of a number is its compliment). What is the value of the checksum transmitted? (A) 0000 (B) 1111 (C) 1101 (E) 000000 10. One way of detecting errors is to transmit data as a block of n rows of k bits per row and add parity bits to each row (bit k+1) and each column (row k+1). The bit in the lower-right corner (k=1, n+1) is a parity bit that checks its row and its column. If k>4, will this scheme detect burst errors of length 4? (A) YES (B) NO (C) Cannot be determined from info