Consider 7-bit messages that we encode into 11-bit codewords using 4 parity bits. Thus our codewords look like: ⟨a, b, c, d, e, f, g, p1, p2, p3, p4⟩ where a, b, c, d, e, f, g are the original 7-bits of the message, and p1, p2, p3, p4 are 4 parity bits. Recall the two properties from Tutorial 2: (0) each bit of the original message appears in at least two parity bits, and (1) no two bits of the original message appear in exactly the same set of parity bits. For the following proposed parity bits, select whether they satisfy property (0), property (1), both, or neither. p1 = a ⊕ e p2 = b ⊕ e ⊕ f p3 = c ⊕ f ⊕ g p4 = d ⊕ g
Consider 7-bit messages that we encode into 11-bit codewords using 4 parity bits. Thus our codewords look like: ⟨a, b, c, d, e, f, g, p1, p2, p3, p4⟩ where a, b, c, d, e, f, g are the original 7-bits of the message, and p1, p2, p3, p4 are 4 parity bits. Recall the two properties from Tutorial 2: (0) each bit of the original message appears in at least two parity bits, and (1) no two bits of the original message appear in exactly the same set of parity bits. For the following proposed parity bits, select whether they satisfy property (0), property (1), both, or neither. p1 = a ⊕ e p2 = b ⊕ e ⊕ f p3 = c ⊕ f ⊕ g p4 = d ⊕ g
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Consider 7-bit messages that we encode into 11-bit codewords using 4 parity bits. Thus our codewords look like:
⟨a, b, c, d, e, f, g, p1, p2, p3, p4⟩
where a, b, c, d, e, f, g are the original 7-bits of the message, and p1, p2, p3, p4 are 4 parity bits. Recall the two properties from Tutorial 2:
(0) each bit of the original message appears in at least two parity bits, and
(1) no two bits of the original message appear in exactly the same set of parity bits.
For the following proposed parity bits, select whether they satisfy property (0), property (1), both, or neither.
p1 = a ⊕ e
p2 = b ⊕ e ⊕ f
p3 = c ⊕ f ⊕ g
p4 = d ⊕ g
Question 3 options:
|
a
|
neither property |
|
b
|
both properties |
|
c
|
only property (0) |
|
d
|
only property (1) |
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