In this video, Todd Lammle continues on his Ethernet technology discussion by diving into more complex foundations and issues, Ethernet framing and MAC addresses—all which are crucial to passing the CCENT exam. Don't skip the foundations. The internetworking, OSI, and Ethernet areas all very important in the CCENT objectives.
- [Voiceover] Half-Duplex also uses the CSMA/CD protocol…that I just discussed, to help prevent collisions…and to permit re transmitting if one occurs.…Now if a hub is attached to a switch as shown in…the graphic, it must operate in Half-Duplex mode…because the end stations must be able to detect collisions.…Now theoretically all hosts connected to the switch…in this figure can communicate at the same time…because they can run full duplex.…Now just keep in mind that the switch port…connected to the hub, as well as the host connecting…to the hub must run at Half-Duplex using CSMA/CD.…
The reason you don't need to worry about collisions…on the switch is because now it's like a freeway,…with multiple lanes instead of the single lane…road provided by Half-Duplex.…Now let's talk about that interface on the switch…that the hub is plugged into, which is interfacef01.…Let's say you get a call that everything in…your network is going slow, or someone is complaining…that the network is going slow, and you…need to find out what's going on.…
For more information on the CCENT exam, visit Cisco's website.
- Overview of internetworking
- The TCP/IP networking model
- Easy subnetting
- Managing Cisco IOS
- Managing Cisco networks and devices
- IP routing
- Layer 2 switching
- VLANs and InterVLAN routing
- Network address translation
Skill Level Intermediate
Internetworking devices4m 20s
3. Introduction to TCP/IP
4. Easy Subnetting
5. VLSM, Summarization, and Troubleshooting TCP/IP
6. Cisco Internetworking Operating System (IOS)
7. Managing a Cisco Internetwork
8. IP Routing
9. Layer 2 Switching
10. VLANs and InterVLAN Routing (IVR)
12. Network Address Translation (NAT)
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