CCNA: Cisco Certified Network Associate Study Guide, 5th by Todd Lammle

By Todd Lammle

Here's the ebook you must organize for Cisco's CCNA examination, 640-801. This examine advisor used to be built to fulfill the exacting specifications of modern-day Cisco certification applicants. as well as the attractive and obtainable educational procedure that has earned writer Todd Lammle the ''Best examine advisor Author'' award in CertCities Readers' selection Awards for 2 consecutive years, this up-to-date 5th variation presents:

  • In-depth insurance of each CCNA examination target
  • Expanded IP addressing and subnetting insurance
  • More targeted info on EIGRP and OSPF
  • Leading-edge examination instruction software program

Authoritative assurance of all examination ambitions, together with:

  • Network making plans & designing
  • Implementation & operation
  • LAN and WAN troubleshooting
  • Communications know-how

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Extra resources for CCNA: Cisco Certified Network Associate Study Guide, 5th Edition (640-801)

Example text

Chapter 1 Internetworking THE CCNA EXAM TOPICS COVERED IN THIS CHAPTER INCLUDE THE FOLLOWING: TECHNOLOGY Describe network communications using layered models Compare and contrast key characteristics of LAN environments Describe the components of network devices Evaluate rules for packet control Welcome to the exciting world of internetworking. This first chapter will really help you understand the basics of internetworking by focusing on how to connect networks together using Cisco routers and switches.

It then checks to see if it can run full duplex, and if it can’t, it will run half duplex. Remember that half-duplex Ethernet shares a collision domain and provides a lower effective throughput than full-duplex Ethernet, which typically has a private collision domain and a higher effective throughput. Ethernet at the Data Link Layer Ethernet at the Data Link layer is responsible for Ethernet addressing, commonly referred to as hardware addressing or MAC addressing. Ethernet is also responsible for framing packets received from the Network layer and preparing them for transmission on the local network through the Ethernet contention media access method.

And keep in mind that using hubs in your network can contribute to congestion on your Ethernet network. As always, plan your network design carefully! 1 shows how a network would look with all these internetwork devices in place. Remember that the router will not only break up broadcast domains for every LAN interface, but break up collision domains as well. 1, did you notice that the router is found at center stage, and that it connects each physical network together? We have to use this layout because of the older technologies involved–—bridges and hubs.

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