CCNA2 TEL III CHAPTER 4

CCNA2 TEL III CHAPTER 4

1. Chapter 4: Switched Networks

   • Modern networks continue to evolve to adapt to the changing way in which organizations carry out their daily activities. Now users expect to have instant access to a company's resources, anytime, anywhere. These resources include not only traditional data, but also video and voice.
     • • Increasing complexity of networks
         • Elements of a converged network

2. Cisco Borderless Networks

3. Hierarchy in switched networks without borders

4. Access, distribution and core core layers

5. Role of switched networks

6. Form factors

   • In commercial networks, various types of switches are used: It is important to implement the appropriate types of switches according to the requirements of the network. In Figure 1, some common business considerations that should be taken into account when selecting the switch equipment are highlighted.

7. Switching as a general concept in network and telecommunications technology

8. Switch Forwarding Methods

   • As the networks grew and companies began to experience slower network performance, Ethernet bridges (an earlier version of the switch) were added to the networks to limit the size of collision domains. In the 1990s, advances in integrated circuit technologies allowed Ethernet LAN switches to replace Ethernet bridges. These switches could transport layer 2 forwarding decisions from the software to the specific application integrated circuits (ASICs). ASICs reduce packet handling time within the device and allow the device to handle a greater number of ports without decreasing performance.

9. Storage and shipping switching

10. Switching by cutting method

11. Collision Domains

12. Broadcast domains

13. Relief from network congestion

14. summary

    • We saw that the trend in networks is convergence through a single set of cables and devices to manage voice, video and data transmission. In addition, there was a notable change in the way in which companies carry out their activities. Employees are no longer limited by physical offices or geographic boundaries. Resources should now be available without inconvenience at any time and place. The Cisco Borderless Network architecture allows different elements, from access switches to wireless access points, to work together and allow users to access resources at any time and from anywhere. The traditional three-layer hierarchical design model divides the network into the core, distribution and access layers, and allows each part of the network to be optimized for specific functionality. It provides modularity, strength and flexibility, which creates a foundation that allows network designers to superimpose security, mobility and unified communication functions. In some networks, it is no

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