![[Contents]](a5f4558b.gif)
![[Back]](8016546c.gif)
![[<< Prev]](8f6f5240.gif)
![[Next >>]](e7ced9d2.gif)
Summary
This chapter examined some basic WAN connectivity concepts, such as analog and digital signaling and dial-up and dedicated service lines. You learned about some types of digital lines, such as the following:
- T1
- T3
- Fractional and multiple T1 and T3 (the DS series)
- DDS
- Switched 56
This chapter also described the characteristics and appropriate situations for some important WAN connectivity service standards, including the following:
Refer to Chapter 2 for more information on packet switching and virtual circuits.