Which of the following are disadvantages of networks? Check all of the boxes that apply. Network intruders can access all computers on a network. Networks are costly to set up. Setting up networks does not require special knowledge.

The disadvantages of networks include:

1. Network intruders can access all computers on a network: This is a security concern where unauthorized individuals might gain access to sensitive information or disrupt network operations.
2. Networks are costly to set up: Establishing and maintaining a network infrastructure can involve significant costs, including hardware, software, and personnel expenses.
3. Setting up networks does not require special knowledge: This statement is incorrect. Setting up networks does require special knowledge and expertise. Network administrators and technicians need to have a good understanding of networking concepts, protocols, and security measures to ensure the network's proper functioning and security.

So, the correct options are:

• Network intruders can access all computers on a network.
• Networks are costly to set up.