Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Related questions

Question

Write a routine in Python to solve the circuits of the images, of up to 5 nodes. (The exercise is already solved)

V2 (j) + Vs (z) =
120 L-60° a).
V2 +
2 V3
12o (-15O
(1).
Step-2:-
By applsing
Analy sis at
Nodal
V3:
V3- Vz
V3
V3- 60C30"
-4
jio
- ju
J.
jio
-4 -
60C30°
jio
8
32+ 60C30"
10
V3 (-4j+ 10j + 5) + Ve (ui)
32+ 51.96+ j30
V3 ( 5+63) + Vz (uj) = s[ 83.96+ j30).
V3 (s+6] + Uz (uj) =
419.8 + ji5o
Vs | 7.81 (50-196) + v2 (4L90")= 4u5.79 (19.66° -(2) ·
By solviug
e9.. (2) 4 (3);
get
-87.895- j 279.862
293· 34 L 252.56°V
- 8.01 + ji09.931
V3 :
110. 22 94•167° v
voltage
values
are
v, = 60L30° u;
V2 = 293. 34 (252.56°v
Vg =
110.22/94167°v
Hence solved

step-1:
Given
Ne kwork-
jior
jion.
60 (30°J
- ju r
-jue
(T) UL0°A
fsom khe
circuit,
60 (30°
By applying
Analysis
Node-ve
->
Nodal
at
V2 - 60 (30°
V2 - V3
Jio
- ju
jio
V2
60 L30°
+
jio
10
jV3
2
- j6 L30°
%3D
jio
10
Vz
jv3
十
6[30-90°.
10
4
Vz (-4j + 5i)
+ 2j v3
6 60°
%3D
20

Expert Solution

Step 1 Function to generate the list of all edges:

def generate_edges(graph):
    edges = []
    for node in graph:
        for neighbour in graph[node]:
            edges.append({node, neighbour})

    return edges

print(generate_edges(graph))

[{'c', 'a'}, {'c', 'b'}, {'b', 'e'}, {'c', 'd'}, {'c', 'b'}, {'c', 'e'}, {'c', 'a'}, {'c', 'd'}, {'c', 'e'}, {'b', 'e'}]

As we can see, there is no edge containing the node "f". "f" is an isolated node of our graph. The following Python function calculates the isolated nodes of a given graph:

def find_isolated_nodes(graph):
    """ returns a set of isolated nodes. """
    isolated = set()
    for node in graph:
        if not graph[node]:
            isolated.add(node)
    return isolated