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Send and Receive Data
network adapter or network interface NIC card
the most common wired Ethernet network interfaces
Built into the Motherboard
RJ-45 & RJ-11
A printed circuit card that mounts inside the computer
A PC card that plugs into a laptop computer
An external unit connected to the computer through a USB cable
Setting the BIOS Utility
a set of controls that load configuration settings when you turn on the computer
recognize both the internal and external adapters
Adding a NIC to an Old Computer
Ethernet adapters are available both as inexpensive no-name products and slightly more costly brand-name versions
To install an internal Ethernet adapter, follow these steps
USB Adapters
Network Adapters for Laptops
NIC CardsThe three indicator lights are:
LINK Lights in green when the adapter is connected to a live network
10/100 Lights in yellow when the adapter is connected to a 100 Mbps network; goes dark when it’s connected to a 10 Mbps network
ACT Flashes in green as data passes through the network connection in either direction
Wi-FiRadio signals instead of Ethernet cables to connect computers and other devices to a LAN
Wi-Fi connections are far less secure than wired networks
Access PointsWi-Fi access points
radio transmitter/receivers (transceivers)
802.11g or 802.11n
A Wi-Fi adapter can also exchange data by radio directly to and from another computer in an ad hoc network
Wi-Fi Control Programs
Access Point Configuration Programs
DHCP
IP address
Wireless network name
Channel number
Operating mode