<｜begin▁of▁sentence｜>### Instruction:
Imagine you are overseeing the security of a communication network structured in a wheel topology, consisting of a central hub node connected to a ring of 5 peripheral nodes, making up a total of 6 nodes. This network representation can be thought of as a wheel graph with 6 nodes. In this scenario, nodes 3 and 4 are crucial communication relays within the network.

First, you're tasked with determining the security perimeter around nodes 3 and 4 in the case where there is no specified secondary group of nodes to consider (nbunch2 is not provided). This involves identifying which nodes would be the first line of impact in case of a compromise or attack on nodes 3 and 4.

Second, you need to evaluate a scenario where the security analysis is narrowed down to include only the central hub node 0 and the peripheral nodes 1 and 5 (nbunch2 is the set of nodes {0, 1, 5}). Here, you're required to assess the potential reach of an incident originating from nodes 3 and 4 specifically towards this subset of nodes in the network.

Understanding these boundaries would aid in creating targeted security policies and protocols to protect the wheel network effectively from threats and breaches.
### Response:
import networkx as nx

# Create a wheel graph with 6 nodes
G = nx.wheel_graph(6)

# Find the node boundary of nodes 3 and 4 within the whole graph
boundary = nx.node_boundary(G, [3, 4])
print('Node boundary when nbunch2=None:', list(boundary))

# Find the node boundary of nodes 3 and 4 with respect to nodes 0, 1, and 5
boundary_with_nbunch2 = nx.node_boundary(G, [3, 4], [0, 1, 5])
print('Node boundary when nbunch2 is given:', list(boundary_with_nbunch2))
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