Network Topology (Solved Questions)

Computer Networks: Network Topologies in Computer Networks
Topics discussed:
1) Revision of various network topologies.
2) Problems on finding out the number of cable links and ports.
3) Problems on network topologies.

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[pranathipalli]

No of cables =n*(n-1)/2
Ports for each device=n-1
No of ports in entire network=n*(n-1)

[Summerofsam]

8/136. A long road ahead. Good luck fellow internet traveler.

[sazadahemad]

Mesh Topology
(i) No of cables needed = n*(n-1)/2
= 6*(6-1)/2
= 15

(ii) No of ports required for each device = n-1

= 6-1
= 5
(iii) No of ports required for the entire network = n * (n-1)

= 6 * (6-1)
= 30

[TheBlizzardfan]

1)15 cables
2)5 ports for each device
3)30 ports in the entire network


Thanks for good explanation.

[cactusexe]

Mesh topology :-

1) how many cables are needed ?
A) The numbers of cables neded in mesh topology is 15

2) How many ports are needed for each device ?
A) 5 ports are needed for each device.

3) How many ports are Needed in entire network?
N = number of nodes =6, number of cable = 15 number of port per node = 5

number of ports in entire network= Number of Nodes x number of port per node = 6x5 = 30
A) 30

[sudeshkumari]

Best computer networking tutorials....Thanks for such fantastic vedios.

[KuldeepSingh-tqpd]

u r genious
all of the faculties of Neso are best..love u all & ur way of teaching

[dipaksinha]

In a mesh network with n devices:
1. Each device connects to n-1 other devices.
2. So, there are n(n-1) total connections if each device is counted separately.
3. But each connection is counted twice, so divide by 2 to avoid double counting.
4. Therefore, the formula for the total number of connections is n(n-1)/2.

[mdsakilbhuiya]

Suppose, number of node= n
Then,
1)no of cables = n*(n-1)/2
2)ports per device= (n-1)
3)total ports = n * (n-1)

[shyamsundarmariya]

Really we learn computer network from you sir . every content is very helpful. thanks for giving us these quality of education.

[lordstephan]

In a mesh network topology with 6 devices, the following can be calculated:

1. Number of ports needed for each device:
Each device in a mesh topology needs to be connected to every other device, so the number of ports required per device is n-1, where n is the total number of devices.
With 6 devices, each device requires 6-1 = 5 ports.[1][2]

2. Total number of cables needed:
In a mesh topology, the total number of cables needed is n(n-1)/2, where n is the total number of devices.
With 6 devices, the total number of cables needed is 6(6-1)/2 = 15 cables.[1][2]

3. Total number of ports in the network:
The total number of ports in the network is n*( n-1), where n is the total number of devices.
With 6 devices, the total number of ports in the network is 6*5 = 30 ports.[1][2]

In summary, for a mesh network topology with 6 devices:
- Each device requires 5 ports
- A total of 15 cables are needed
- The total number of ports in the network is 30

[supra]

I am thankful to neso academy for providing such a systematic course .

[ayushshukla]

no of cables = nCp (n = no of nodes or computers, p = a cable can connect two nodes/computers at a time)
so n=6, p =2
6C2 = 6!/2!4! = 15

2. PORTS = 5 per nodes

3.. total = 30 ports

[soumyakantabanerjeebban]

So beautiful explanation... it is very helpful to students studying comp app

[bussi]

Mesh topology is simple a complete graph on paper, so that:
- There are n(n-1)/2 cables, equivalent to the number of edges
- Since each device will connect to every other except for itself, it has n-1 ports
- Each cable has 2 ends so with e cable, we have a total 2*e port for the whole system

[--KumaranP]

1. Each device to be connected to every other device so if there are n devices we need (n-1) cables thus (n-1) ports.
2. For the whole mesh of n devices the total number of ports= n*(n-1) ports.(here ports are unique to a device )
3. But each cable is shared between 2 devices the total number of cables in the mesh will be (n*(n-1))/2.

[mahaboobpeershaik]

For Mesh topology
Suppose n nodes are there
1st node connects to n-1 nodes
2nd node connects to n-2 nodes
....
nth node connects to 1 node

No. cables required are
=
=(n-1)*(n-1+1)/2
=(n-1)*n/2
= n*(n-1)/2

[vineethmeruop]

Formula : n(n-1)/2
NO OF CABLES : N
NO OF CABLES : 15

NO OF PORTS : N
NO OF PORTS { NOPD } : 5

NO OF PEN : 30

[mampinag]

No of cables : 15
No of ports per devices : 5
Total no of ports in a network: 30

[marcomarcello]

number of computer = n = 5;
(i) number of cables = n*(n-1)/2 = 15 or (n-1)+(n-2)+(n-3)+(n-4) = 5+4+3+2+1 = 15;
(ii) port each device = n-1 = 4;
(iii) total port = port each device * n or n(n-1) = 6*5 = 30