(Do not write on the back
of a page!!)
Name:
________________________________________
List two of the most important international standards organizations and discuss the relationships between them.
Discuss the following terms: Layer services, service access points, service users, service providers.
What is peer-to-peer Virtual communication? Why is it called “virtual”?
What is Nth layer protocol?
Point out the differences between OSI model and TCP/IP model in terms of:
a) Number of layers
b) Equivalent layers between the 2 models—draw a diagram
c) Reasons why TCP/IP model dominates
d) OSI model is still important. Why?
X1 carrier(a new digital carrier that you are designing) is designed to carry 48 channels(46 voice channels plus one signaling channel and one synchronization channel). Each sample of a voice will be represented with 8 bits and the voice bandwidth is limited to 4Khz. What is the total data rate of your digital carrier system including the overheads? Show your calculations
Show in a diagram the LAN protocol architecture: its sublayers, names for the sublayers. Also include the following and clearly mark them in the diagram: IEEE 802.3, CSMA/CD, IEEE 802.5, Token Ring
Local Area Networks have been evolving through 3 generations(4th in sight) so far. Describe each generation: Their speeds, MAC protocols, Standards(IEEE xxx.x). Also discuss the usage of switches as interim solutions between generations.
State the main reasons why Ethernet dominates in LAN technologies throughout all the generations of LANs.
Question 11: (8
points) Bridges
Describe the problem of
bridged networks called “Closed loop problem” and how the problem is solved.
What are the functions of a protocol layer(list of things that a layer should achieve) to provide a connection-oriented service to its upper layer?
a) What is “Classful Internet Addressing”?
b) What are the disadvantages of it?