New PDF release: CCNA fast pass

By Todd Lammle

The excellent CCNA education and evaluate Tool

From the writer of Sybex's best-selling CCNA: Cisco qualified community affiliate examine Guide comes the streamlined instrument you must hone in on serious CCNA details: CCNA quick Pass. The enclosed CD helps you to perform, perform, perform so that you can technique the examination with confidence.

Coverage includes:

  • Designing internetworks utilizing Cisco technology
  • Developing an entry List
  • Evaluating TCP/IP verbal exchange process
  • Configuring routers and switches
  • Configuring IP addresses, subnet mask, and gateway addresses
  • Performing LAN, VLAN, and WAN troubleshooting
  • Understanding principles for packet control

Note:CD-ROM/DVD and different supplementary fabrics aren't integrated as a part of publication file.

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Additional info for CCNA fast pass

Example text

Saying something like this is a lot like a TCP acknowledgment—it’s designed to get you verification. ” They end their conversations with a “Goodbye” of some kind, putting closure on the phone call. TCP also performs these types of functions. Alternately, using UDP is like sending a postcard. To do that, you don’t need to contact the other party first. You simply write your message, address the postcard, and mail it. This is analogous to UDP’s connectionless orientation. Since the message on the postcard is probably not a matter of life or death, you don’t need an acknowledgment of its receipt.

Conversely, switches aren’t used to create internetworks (they do not break up broadcast domains by default); they’re employed to add functionality to a network LAN. The main purpose of a switch is to make a LAN work better—to optimize its performance—providing more bandwidth for the LAN’s users. And switches don’t forward packets to other networks as routers do. Instead, they only “switch” frames from one port to another within the switched network. By default, switches break up collision domains.

First, you need to know exactly what an internetwork is. You create an internetwork when you connect two or more LANs or WANs via a router and configure a logical network addressing scheme with a protocol such as the Internet Protocol (IP). I’m also going to dissect the Open Systems Interconnection (OSI) model and describe each part to you in detail because you need a good grasp of it for the solid foundation you’ll build your networking knowledge upon. The OSI model has seven hierarchical layers that were developed to enable different networks to communicate reliably between disparate systems.

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