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Ethernet
ethernet
Ethernet standards, 10 gigabit Ethernet defines only full duplex point to point links which are generally connected by network switches. Half duplex operation, hubs and CSMA/CD (carrier sense multiple access with collision detection) do not exist in 10GbE
The role of ethernet switches in a network is to allow computers and other devices to talk to each other. This also allows many users to access a shared device such as a printer.
Physical and Data-link layers.Physical being layer 1 and Data-link being layer 2.
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.
If the printer can connect to the wireless access point via ethernet and that the printer has been enabled to be used on a wireless network then in theory yes.
Either connect via a wireless network, connect through a 3G network or connect your laptop with an ethernet cable.
Power over Ethernet
An ethernet adapter is the component that allows you to connect to your internet modem or computer network. Upon connecting your ethernet cable, you will be able to access the internet or computer network to which you are connected.
Ethernet is more "physically secure", in that it is sometimes more difficult to gain unauthorized access to a network, since you need to be in close physical proximity to a network cable. However, it does not require any form of cryptographic authentication to connect to a network, which can be optionally provided by wireless.
CSMA/CD: Carrier Sense Multiple Access / Collision Detection.