Chapter_11 - Todd Lammles CompTIA Network Chapter 11...

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Click to edit Master subtitle style Todd Lammle’s CompTIA Network+ Chapter 11: Switching and VLANs Instructor:
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Chapter 11 Objectives The Following CompTIA Network+ Exam Objectives Are Covered in This Chapter: 3.3 Explain the advanced features of a switch PoE Spanning tree VLAN Trunking Port mirroring Port authentication 2
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Switching and Virtual LANs (VLANs) 3 Switching breaks up large collision domains into smaller ones and that a collision domain is a network segment with two or more devices sharing the same bandwidth. Switched design is properly implemented, it will result in a clean, cost-effective, and resilient internetwork.
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The first LAN 4 The first LAN had each hub placed into a router port.
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Switched network design 5 A typical, contemporary, and complete switched network design/implementation would look something like this. There is a router implemented. The router creates and handles logical segmentation. What makes Layer 2 switching so efficient is that no modification to the data packet takes place.
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Switching Services 6 Layer 2 switching provides the following benefits: – Hardware-based bridging (ASIC) Wire speed Low latency – Low cost
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Switch Functions at Layer 2 7 There are three distinct functions of Layer 2 switching Address learning Forward/filter decisions Loop avoidance
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Address Learning 8 Layer 2 switches and bridges are capable of address learning ; they remember the source hardware address of each frame received on an interface and enter this information into a MAC database known as a forward/filter table . Initially there is no address information in the table.
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Forwarding/Filter Table 9 When the hosts start communicating, the switch places the source hardware address of each frame in the table along with the corresponding port 1.Host A sends a frame to Host B. Host A’s MAC address is 0000.8c01.000A;
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This note was uploaded on 12/17/2010 for the course TECHNOLOGY NetPlus taught by Professor Na during the Spring '10 term at Sullivan.

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Chapter_11 - Todd Lammles CompTIA Network Chapter 11...

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