3.1.4. Network interfaces¶

Interfaces are network access points. There are two types of interfaces:

Physical interfaces (e.g.: ethernet network port, network port)
Alleviate the administrator’s job by enabling him to handle network connections the same way as physical network ports. This facility is critical for routing, for instance.
Logical interfaces, or pseudo-interfaces (e.g.: interface, tunnel, loopback, interface, ethernet bridge)
Network interfaces have generic properties (such as IP addresses) and functions (such as turning them on or off), and some other properties or functions specific to their type (e.g. authentication information or a lower protocol specification). This chapter covers generic properties and functions.