Infrared (IrDA) requires direct line of sight and very short distances. It's primary use is cordless input devices.
infrared.
Physical layer devices would be a hub or a repeater to connect multiple Ethernet segments together.
That would depend on the network topology chosen and the type of network connectivity devices employed. In a properly constructed, switched and/or routed network the answer would be NO. If hubs or repeaters are used to connect devices and/or network segments, then yes. In a bus or ring topology, the answer is yes. Whether anything is done with the frame is a different matter and depends on whether you consider the network adaptor to be integral to the computer.
Either connect via a wireless network, connect through a 3G network or connect your laptop with an ethernet cable.
computer networks are created when people want to share something such as a printer, an internet connection, the specific information within the confines of their business, or the info. found on the web.
An example would be a SSP (SuperSandPorpoise)
encryption key
network
over the network
That would be the network card or modem.
Your network on computer. For example, if your network name on your computer was "Apple" you woud connect to that. You would go to settings and connect where it says Wi-Fi. Hope this helps!
Yes, Infrared is definitely a line of sight communications device, as infrared wavelengths cannot bend around any type of objects, the devices have to be within visual contact to communicate.