Information Technology Reference
In-Depth Information
IP Link-State Routing Protocols
Link-state routing protocols exchange topological information between routers. The infor-
mation describes information about the routers and the routers' connected links. This
information enables each router to understand the topology of the network. After each
router understands the network's topology, it can create a routing table based on the
topology. This chapter discusses two IP link-state protocols, OSPF and IS-IS. OSPF is the
most popular standards-based interior routing protocol. Some service provider networks
still use IS-IS, and IS-IS has emerged as an important protocol in Multiprotocol Label
Switching (MPLS) architecture. You should understand the general networking concepts
discussed in Chapter 2, “Networking Concepts Review,” before reading this chapter.
“Do I Know This Already?” Quiz
The purpose of this assessment quiz is to help you determine how to spend your limited
study time. If you can answer most or all of these questions, you might want to skim the
Foundation Topics section and return to it later as necessary. Review the Foundation
Summary section and answer the questions at the end of the chapter to ensure that you have
a strong grasp of the material covered. If you intend to read the entire chapter, you do not
necessarily need to answer these questions now. If you find these assessment questions
difficult, read through the entire Foundation Topics section and review it until you feel
comfortable with your ability to answer all of the Q & A questions at the end of the chapter.
The following questions are repeated at the end of the chapter in the Q & A section with
additional questions to test your mastery of the material.
Select the best answer. Answers to these questions are in the Appendix, “Answers to Quiz
Questions.”
Which type of router always has one or more interfaces connected to Area 0.0.0.0?
1
a. Level 2 router
b. ASBR
c. Backbone router
d. Autonomous boundary router
Search WWH ::
Custom Search