Читать книгу CCNA ICND2 Study Guide - Lammle Todd - Страница 7

THE FOLLOWING ICND2 EXAM TOPICS ARE COVERED IN THIS CHAPTER:

1.0 LAN Switching Technologies

1.1 Configure, verify, and troubleshoot VLANs (normal/extended range) spanning multiple switches

1.1.a Access ports (data and voice)

1.1.b Default VLAN

1.2 Configure, verify, and troubleshoot interswitch connectivity

1.2.a Add and remove VLANs on a trunk

1.2.b DTP and VTP (v1&v2)

1.3 Configure, verify, and troubleshoot STP protocols

1.3.a STP mode (PVST+ and RPVST+)

1.3.b STP root bridge selection

1.4 Configure, verify, and troubleshoot STP-related optional features

1.4.a PortFast

1.4.b BPDU guard

1.5 Configure, verify, and troubleshoot (Layer 2/Layer 3) EtherChannel

1.5.a Static

1.5.b PAGP

1.5.c LACP

1.7 Describe common access layer threat mitigation techniques

1.7.c Nondefault native VLAN

2.0 Routing Technologies

2.1 Configure, verify, and troubleshoot Inter-VLAN routing

2.1.a Router on a stick

2.1.b SVI

Long ago, a company called Digital Equipment Corporation (DEC) created the original version of Spanning Tree Protocol (STP). The IEEE later created its own version of STP called 802.1d. Cisco has moved toward another industry standard in its newer switches called 802.1w. We'll explore both the old and new versions of STP in this chapter, but first, I'll define some important STP basics.

Routing protocols like RIP, EIGRP, and OSPF have processes for preventing loops from occurring at the Network layer, but if you have redundant physical links between your switches, these protocols won't do a thing to stop loops from occurring at the Data Link layer. That's exactly why STP was developed – to put an end to loop issues in a layer 2 switched network. It's also why we'll be thoroughly exploring the key features of this vital protocol as well as how it works within a switched network in this chapter.

After covering STP in detail, we'll move on to explore EtherChannel.

To find up-to-the-minute updates for this chapter, please see www.lammle.com/ccna or the book's web page at www.sybex.com/go/ccna.