10 Questions
What is the purpose of Consistent Overhead Byte Stuffing (COBS) algorithm?
The purpose of COBS algorithm is to encode data bytes for efficient, reliable, unambiguous packet framing.
How does COBS algorithm ensure packet framing regardless of packet content?
COBS algorithm uses a particular byte value (typically zero) as a packet delimiter and replaces each zero data byte with a non-zero value to avoid misinterpretation of packet boundaries.
What is the process of byte stuffing?
Byte stuffing is the process of transforming a sequence of data bytes, which may contain 'illegal' or 'reserved' values, into a longer sequence that contains no occurrences of those values.
What is the overhead of the COBS algorithm?
The overhead of the COBS algorithm refers to the extra length of the transformed sequence compared to the original sequence of data bytes.
What is an example of a well-known framing technique that uses HDLC framing?
PPP (Point-to-Point Protocol) is an example of a well-known protocol that uses HDLC framing.
What are logical and arithmetic shifts used for?
Logical and arithmetic shifts are used for bit manipulation operations (bitwise operations).
How does left shift operation affect a number?
The result of a left shift operation is a multiplication by $2^n$, where $n$ is the number of shifted bit positions.
What is the result of left shifting the binary number 0010 by one position?
Left shifting the binary number 0010 by one position results in the binary number 0100, which is 4 in decimal representation.
What happens when the first '1' is shifted out of the left edge in an unsigned representation?
When the first '1' is shifted out of the left edge in an unsigned representation, the operation has overflowed and the result of the multiplication is larger than the largest possible.
Can left shift operation be applied to signed values?
Yes, left shift operation can be applied to signed values.
Test your knowledge of Consistent Overhead Byte Stuffing (COBS) with this quiz! Learn about the algorithm's use in encoding data bytes for efficient and reliable packet framing. Challenge yourself with questions about packet delimiters and recovering from malformed packets.
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