Chapter 3. Introducing Switching, Routing, and Address Translation


Chapter Goals

This Chapter introduces the reader to TCP/IP routing and switching. The following topics are covered:

  • Layer 2 SwitchingLearn how Ethernet frames are switched by LAN switches.

  • Layer 3 RoutingLearn how IP packets are routed by routers.

  • Layer 3 SwitchingLearn how IP packets are switched by routers.

  • Layer 34 Network Address TranslationLearn how TCP segments and IP packets are translated by NAT-capable devices.

In Chapter 2, "Exploring the Network Layers," you learned how TCP segments, IP packets, and Ethernet frames are generated, encapsulated, and transmitted onto a network by TCP/IP devices.In this Chapter, you will learn how to design a network to efficiently translate, route, and switch the TCP segments, IP packets, and Ethernet frames that flow through your network. The following topics are discussed in this Chapter:

  • Frame Switching and Virtual LANs Switching TCP/IP involves forwarding Layer 2 Ethernet frames within VLANs.

  • IP Routing Static and dynamic routing protocols define the path that traffic takes from one end system to the other.

  • Packet Switching Packets are switched within routers using process switching, fast switching, or Cisco Express Forwarding (CEF)

  • Network Address Translation Packets' IP address fields are rewritten to conserve IP addresses, and hide internal IP addressing schemes and load balancing requests across groups of servers.



Content Networking Fundamentals
Content Networking Fundamentals
ISBN: 1587052407
EAN: 2147483647
Year: N/A
Pages: 178

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