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QUESTION
a) List the seven layers of the ISO-OSI model and briefly describe the role of each layer
b) Describe the functions of the following intermediate systems-
c) Assume six devices are arranged in a mesh topology
How many cables are needed?
How many ports are needed for each device?
What is Security solutions Though there are a number of security solutions available due to sophistication in technology, there are a number of risks and difficulties attached
Q. Unshielded Twisted Pair - transmission media? - A most common kind suitable for both voice and data transmission - Categories are determined by chain quality - Cat 3 c
DEFINITION: Latency = Delay. Because a store and forward switch reads the entire frame before forwarding, a larger frame takes longer than a shorter frame.
Hub A hub is a small box that connects individual devices on network so that these devices can communicate with each other. Hub is an inexpensive device. It is comm
Q. Show the application layer of Osi reference model? - The application layer is OSI layer that is closest to the user. - It offers network services to the user's applicatio
Define Character Stuffing? In byte stuffing (or character stuffing), a particular byte is added to the data section of the frame when there is a character with the same pattern
10Base5 Connectors Transceiver - intermediary device as well called a medium attachment unit (MAU) Performs CSMA/CD function may perhaps contain small buffer Atta
Error control in TCP-duplicate & out-of-order segment- Duplicate segment - The destination TCP merely discards the segment Out-of-order segment - Not acknowledged unt
Unguided Media: Wireless - A Wireless communication transporting electromagnetic waves without a physical conductor Wireless Propagation Methods - Ground - radio
Q. Difficulties in Internetwork Communication? - Data arrive at interface f1 of s1 - How does s1 know that they must be sent out from interface f3? - There is no provisio
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