Question

ABC International School, Delhi has different wings Administrative Wing (W1), Primary Wing (W2), Middle Wing (W3), and Secondary Wing (W4), as shown in the diagram:  

The school also has a branch in Mumbai. The school management wants to connect all the wings as well as all the computers of each wing (W1, W2, W3, W4).

Distance between the wings are as follows:

W3 to W1	85 m
W1 to W2	40 m
W2 to W4	25 m
W4 to W3	120 m
W3 to W2	150 m
W1 to W4	170 m

Number of computers in each of the wing:

W1	125
W2	40
W3	42
W4	60

Based on the above specifications, answer the following questions:

1. Suggest the topology and draw the most suitable cable layout for connecting all the wings of Delhi branch.
2. Suggest the kind Of network required (out of LAN, MAN, WAN) for connecting
   1. Administrative Wing (W1) with Middle Wing (W3).
   2. Administrative Wing (W1) with the Mumbai Branch.
3. Suggest the placement of the following devices with Justification:
   1. Repeater
   2. Switch/Hub
4. Due to pandemic school had to adopt Online classes. Suggest the protocol that is used for sending the voice signals over internet. Also, give an example of an application of WWW that helped the teachers to send messages instantly to the students.

Answer 1

1. Star topology
   
2. (a) LAN
   (b) WAN
3. (a) Given the greater distance, the repeater should be positioned between wings W3 to W2 and W1 to W4.
   (b) Each wing should include a hub or switch to link different PCs.
4. Protocol: VoIP
   Example to send messages instantly: WhatsApp