CS 635 Spring 1998 MidTerm Review
The exam will be closed book and closed notes. The exam covers chapters 1-6,8.You can
bring a calculator.
To do well on the exam you need to understand the following principles and concepts:
- Know the definition of a LAN and WAN
- Know what is meant by ``point-to-point'' and ``broadcast'' networks
- Understand why layering is used in building computer networks.
- Understand what an interface is between layers.
- Understand the concept of encapsulation and how it is used in layering.
- Know the difference between the following type of services: reliable delivery, best
effort and acknowledged delivery.
- Understand the need for framing.
- Understand the advantages and disadvantages of using a length count, bit delimiters,
character delimiters and encoding violations for framing.
- Know the difference between error detection and correction.
- Understand the notion of a sliding window protocol.
- Know the basic idea of the High Level Data Link Control protocol
- Know how to calculate the expected channel utilization for a protocol.
- Packet and Circuit switching
- Encodings (NRZ, Manchester, Diff Manchester, etc.)
- Know the two basic approaches used for the ALOHA protocols and the problemthese
- Be familiar with the use of carrier sense protocols.
- Know how the CSMA/CD (collision detection) protocol works.
- Understand how propagation delay is important for networks using CSMA/CD.
- Be familiar with the basic details of the IEEE 802.3 (Ethernet) standard.
- Understand the use of the binary exponential backoff algorithm.
- Know how the 802.4 (Token Bus) protocol works
- Know how the 802.5 (Token Ring) protocol works
- Know how the FDDI works. Know the differences between 802.5 and FDDI protocols.
- Know the relative advantages and disadvantages of the three IEEE 802standards.
- Know where the 802.2 (Logical Link Layer) standard fits in and its serviceoptions.
- Know where the 802.2 (Logical Link Layer) standard fits in and its service options
- Read the assigned papers: "An intro. to LAN", Clark, et. al.,
"Ethernet", Metcalf, et. al, "Measured Capacity of the Ethernet",
Boggs, et. al.