Question1. The IEEE 802 series of standards depict both the Physical and Data Link layers of their respective technologies. Two significant standards are 802.3 and 802.5, respectively recognized as CSMA/CD (Ethernet) and Token Ring.
i. Describe how CSMA/CD operates and illustrate how Ethernet deals with collisions.
ii. Provide the structure of a typical Token Ring frame and describe how communication is effected in a Token Ring Network.
Question2. A datagram of 3000 bytes has to travel over a network with a MTU size of 1000 bytes. Describe how fragmentation can be used to solve this problem.
You should provide the value of the 3 key fields employed in fragmentation for each fragment created.
Question3. Nowadays many companies are shifting towards the IEEE 802.11 x standards for extending their network.
i. Outline two popular flavours of this wireless standard. Elaborate on operating frequency, range and speed of each flavour.
ii. What are the two modes of operation of this standard and describe the difference between the two.
iii. Mention one security issue with this wireless technology and describe how this issue can be addressed.