Read e-book online Cisco Networking Academy Program. CCNA 3 and 4 Companion PDF

By Cisco Systems Inc., Cisco Networking Academy Program

Use this significant other advisor as a transportable table connection with entry info for examine and evaluate, and the convenient Networker's magazine to take beneficial notes! This specific variation features a loose reproduction of A Networker's magazine. Be the envy of your whole classmates or co-workers through sporting round this sturdy Cisco branded Networker's magazine to rfile your paintings, troubleshoot, configure routers and extra.

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Read Online or Download Cisco Networking Academy Program. CCNA 3 and 4 Companion Guide PDF

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Extra resources for Cisco Networking Academy Program. CCNA 3 and 4 Companion Guide

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The act of shaking hands is understood by both parties as a signal for a friendly greeting. book Page 28 Tuesday, April 17, 2001 6:06 PM Chapter 1 Review: The OSI Reference Model and Routing 28 way. The first handshake, or greeting, requests synchronization. The second and third handshakes acknowledge the initial synchronization request, as well as synchronize the connection parameters in the opposite direction. The final handshake segment is an acknowledgment used to inform the destination that both sides agree that a connection has been established.

The Data Link Layer Access to the networking media occurs at the data link layer of the OSI reference model. The data link layer, where the MAC address is located, is adjacent to the physical layer. No two MAC addresses are ever alike. Thus, on a network, the network interface card (NIC) is where a device connects to the medium, and each NIC has a unique MAC address. Before each NIC leaves the factory, the hardware manufacturer assigns it a MAC address. This address is programmed into a chip on the NIC.

Interior routing protocols are used within a single autonomous system. ■ IP Routing Protocols At the network layer (Layer 3) of the OSI reference model, a router can use IP routing protocols to accomplish routing through the implementation of a specific routing protocol. Examples of IP routing protocols include ■ ■ ■ ■ RIP—A distance-vector routing protocol IGRP—Cisco’s distance-vector routing protocol OSPF—A link-state routing protocol EIGRP—A balanced-hybrid routing protocol Classes of Routing Protocols Most interior routing protocols can be classified as one of three basic types: distance vector, link state, or balanced-hybrid routing.

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