$1.($a$)$ Nile University of Nigeria is starting its first campus in Abuja with its centre admission office in Lagos. The University has three major buildings comprising of Admin Building. Academic Building and Research Building in the $5$ km area campus. As a network expert, you need to suggest the network plan as per $($i$)$ to $($iv$)$ to the authorities keeping in mind the distances and other given parameters.

Expected wire distances between various locations

$$ Research Building to Adan Building $90$ m

$$ Research Building to Academic Building $80$ m

$$ Academic Building to Admin Building $15$ m

$$ Lagos Admission Centre to Abuja Campus $1450$ km

Expected number of computers to be installed at various locations in the university are as follows:

Research Building: $20$

Academic Building: $150$

Admin Building: $35$

Lagos Admission Office: $5$

I. Suggest the authorities and illustrate, the cable layout $($topology$)$ amongst various buildings inside the university campus for connecting the building.

II$.$ Suggest the most suitable place $($i$.$e$.$ building$)$ to house the server of this organization, with a suitable reason.

III. Suggest an efficient device from the following to be installed in each of the buildings to connect all computers and give reasons: Gateway, Modem, Switch.

IV$.$ Suggest a suitable $($very high speed$)$ service$/$medium to provide data connectivity between Admission Building located in Lagos and the campus located in Abuja.

I. Expand the abbreviation CSMA$/$CD and describe the process of the contention scheme

II$.$ What is binary exponential backoff in CSMA$/$CD

$($c$)$ Briefly describe and illustrate the data transfer process through intermediate nodes $($routers$)$ when a message travels from device A to device B$,$ as it relates to OSI layered model $($Hint: Layers involved at the intermediate nodes$)$

$($d$)($i$)$ Using their standard and contention scheme, describe Ethernet, Token Ring and Token Bus

$($il$)$ List three $(3)$ types of Ethernet Network and their standard

$($e$)$ Define the following terms in Computer Networks

$($i$)$ Fragmentation $($ii$)$ Routing $($iii$)$ Decapsulation