Parity System:
- Simplest method for
error detection
- One parity bit attached to the information
- Even Parity and Odd Parity
Even Parity
- One bit is
attached to the information so that
the total number
of 1 bits is an even number
1011001 0
1010010 1
Odd Parity
- One bit is
attached to the information so that
the total number
of 1 bits is an odd number
1011001 1
1010010 0
What tool have you used to create and analyze packet
captures?
Network
Monitor in Win2K / Win2K3, Ethereal in Linux, OptiView Series II (by Fluke
Networks).
Define Shanon Capacity?
It is the theoretical highest data rate foe a noise channel.
Capacity=
Bandwidth * log2 (1+SNR)
What is Nyquist bit rate formula?
For a
noiseless channel, the Nyquist bit rate formula defines the theoretical maximum
bit rate.Bitrate=2* Bandwidth*log2L
What is SNR?
SNR is the signal to noise ratio, it is the statistical ratio of the
power of the signal to the power of the noise.
What is Kirchhoff’s Principle?
All algorithms must be public; only the keys are secret.
What is monoalphabetic Substitution?
The general
system of symbol for symbol substitution is called Monoalphabetic Substitution.
What are Qubits?
Bits sent one photon at a time are called
Qubits
What are S Boxes?
The
substitution in Symmetric key algorithms is performed by S-Boxes.
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