Using a wireless encryption key i.e WPA (Or less secure WEP) and MAC Address filtering.
You can also stop the broadcasting the SSID, however the wireless access point can still be picked up.
It uses a 128-bit pre-shared hexadecimal key to prevent unauthorized wireless access.
This is assuming that there is no outside access to the Ethernet network such as a Internet connection. If there were then firewalls would be needed to prevent a outside intrusion of the network. In addition to physical access security, a wireless network requires authentication and encryption to prevent unauthorized devices from connecting to the wireless network or capturing and decoding the data that is being transferred via a wireless network connection. If the wireless network has outside WAN access then you would also need firewalls as with the Ethernet network.
firewall
use wireless encryption. for example, WPA or WEP (http://en.wikipedia.org/wiki/Wifi#Network_security)
most pepole would says yes as you may want to do personal banking and such and is someone has access to your network you can be prone to someone peeking in to what you do online
to prevent unauthorized persons from gaining access to a private network
The web key for Cisco typically refers to the wireless network security key or passphrase used to connect to a Cisco wireless router or access point. This key is essential for encrypting wireless communications and can be found in the router's settings or documentation. Users can usually access it by logging into the router's web interface. It's important to keep this key secure to prevent unauthorized access to the network.
To prevent collisions.
Key wireless router settings that can affect network security include enabling WPA3 or WPA2 encryption for the Wi-Fi network, which protects data transmission. Disabling the SSID broadcast can prevent unauthorized users from easily discovering the network. Additionally, changing the default admin username and password, as well as updating the router's firmware regularly, can protect against vulnerabilities and unauthorized access. Lastly, enabling features like MAC address filtering can add an extra layer of security by restricting which devices can connect to the network.
loro maro = Firewall
Ssid broadcast
Disabling the SSID Broadcast.