In this video, Todd Lammle continues with his explanation of internetworking by discussing layer 2 switching. Understanding how layer 2 switches and layer 3 switches (or routers) work is key to understanding internetworking. Todd Lammle also covers new devices for the CCNA exam, such as wireless access points, controllers, and even firewalls.
- So if we don't have routers…and we have switches or microsegmentations…like Cisco likes to call it…where every host is in a switch port,…we can see here that Bob is shouting or…sending out a broadcast.…This is transmitted out all ports on a switch by default.…So we can see that this is one big broadcast domain…but this is the functions of switch.…We don't break up broadcast domains by default.…We do break up collision domains.…
Now in this case here we're going to create…an internetwork by placing a router between…these two lans and by creating two different…subnets or lans.…In this case here when Bob is to send a broadcast…then it's sent only to the router and then discarded.…Routers do not forward broadcasts by default.…In this case here Sally does not receive any of the data…from Bob unless he specifically…is sending data to her IP address.…
Now it's important to remember for the objectives…that you have different networking devices.…Let's take a look at some of the devices…that are new to the objectives.…First, we have our wireless networks.…
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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