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Network Configuration—BasicsFreeBSD gives you an in-depth control over your network configuration. This is doneusing a few simple but powerful tools such as ifconfig(8).This chapter explains interface configuration using ifconfig(8) utility anda number of related configuration files, as well as some connectivity test anddebugging tools.In this chapter, we will look at the following:• Ifconfig utility• Advanced ifconfig options• Network testing tools.Ifconfig UtilityThe ifconfig(8) utility is your all-in-one utility to configure a network interface'slayer2 and layer3 characteristics.From an operating system's point of view, your system has a number of physical andlogical network interfaces attached.Physical network interfaces include the following:• Ethernet interfaces with different physical ports (that is electrical or optical)• Wireless network interface (802.11 a/b/g/n)• Bluetooth interface• Printer (PLIP) interface.