1. Ethernet
Purpose: This chapter reviews general networking theory and introduces students to some of Cisco’s product line.
Timing: This chapter takes approximately 1.5 hours to present.
Note: This section has a product selection tool laboratory exercise at the end.
Contents:
Objectives—This section explains what the student will be able to do at the end of this chapter.
Defining Network Components—This section displays where devices are placed in the network.
Mapping Business Needs to a Hierarchical Model—This section describes the heirarchical model used in network design.
OSI Model Overview—This section reviews the OSI model.
Communicating Between Layers—This section describes encapsulation and de-encapsulation.
Written Exercise 1—This section has a written exercise to test the students’ knowledge of the OSI model.
Physical Layer Functions—This section describes the physical layer of the OSI Model.
Data Link Layer Functions—This section describes the data link layer of the OSI Model.
Network Layer Functions—This section describes the network layer of the OSI Model.
Transport Layer Functions—This section describes the transport layer of the OSI Model.

2. Ethernet What is Ethernet? LAN standards Ethernet framing
Ethernet topologies
Ethernet devices
Ethernet cabling
CSMA /CD

3. What is Ethernet? A set of specifications for LAN communication
Covers Layer 1 and Layer 2 of OSI model
Most widely used LAN implementation today

4. Ethernet Evolution

5. Ethernet Specifications
Physical layer specifications include-
Signaling and encoding type
Cabling type, length and connectors
Topologies
Data link layer specifications
Media Access Control
Framing

6. LAN Standards
Lesson Aim
<Enter lesson aim here.>

7. Ethernet Frame Structure

8. Ethernet Topologies
Physical layer topologies -
Bus
Star

9. Ethernet Devices Hubs/repeaters Single broadcast and collision domain
Bridge
Single broadcast domain
Multiple collision domains
Switch
Single broadcast domain – except with VLANs
VLANs are broadcast dmains

10. Ethernet Devices Routers
Segment broadcast domains to contain broadcasts
Provide packet forwarding from one broadcast domain (aka VLAN; aka subnet) to another

11. Network Device Domains
Hub
Bridge
Switch
Router
Emphasize: This figure summarizes the different collision domains and broadcast domains on various network devices. It is important that students understand the difference between the two domains.
Collision Domains:
Broadcast Domains:

12. Ethernet Cabling Coaxial - Used in bus topology
10Base2 (thinnet); 10Base5 (thicknet)
Twisted pair
Used in star topology
Cat 3, 5, 6

13. Ethernet Cabling Twisted pair Straight through Host to switch
Router to switch
Crossover
Switch/hub to switch/hub
PC/router to PC/router

14. UTP Implementation Crossover
Cable 10BaseT/ 100BaseT Crossover
Crossover Cable
Hub/Switch
Hub/Switch 8 1
Pin Label
1 RD+
2 RD-
3 TD+
4 NC
5 NC
6 TD-
7 NC
8 NC
Pin Label
1 RD+
2 RD-
3 TD+
4 NC
5 NC
6 TD-
7 NC
8 NC 1 8 8 1
w o o w b
w g g br
w br 8 1
Emphasize: Make sure each student has seen a Cat 5 cable. Describe the test for crossover cable determination. If you hold the two ends of an RJ-45 cable side by side, you'll see eight colored strips, or pins, at each end.
If the order of the colored pins is the same at each end, then the cable is straight through.
If the order of the colors is reversed at each end, then the cable is crossed over or rolled.
Ethernet uses pins 1, 2, 3, and 6. For crossover, pin 1 is connected to 3, and oin 2 is connected to 6.
Crossover cables are used for switch to switch cabling, PC to PC cabling, switch to hub cabling, hub to hub cabling, or router to router cabling.
Some wires on cable ends are crossed br
w g
w br
w o w b b o g

15. MAC Address Components

16. MAC Addresses

17. CSMA/CD
Lesson Aim
<Enter lesson aim here.>