CS 4873 Computer Networks Exam 1 Review Fall 1997
- Network Layers
- Chapter 2, The Physical Layer
- Concept of bandwidth limited signals
- Fourier series
- Sampling Theorem: bandwidth H, 2H exact samples to reconstruct
the signal
- Nyquist theorem: maximum data rate is 2H lg V bits/sec
- Shannon theorem: maximum data rate is H lg (1 + S/N)
- Using dB
- Relation between frequency and wavelength
- Modems and codecs
- T1 carrier, PCM
- Circuit, message, and packet switching
- Chapter 3, the Data Link Layer
- Character stuffing
- Bit stuffing
- Error detection and correction
- Hamming distance
- Hamming code
- Error detection using parity and CRC
- Protocols 1-5