- [Instructor] The IP routing process is very simple…and doesn't change regardless of the size of your network.…For a good example of this, let's look at the graphic…and describe step by step what happens…when Host A wants to communicate…with Host B on a different network.…First, ICMP creates an echo request payload…because this was a ping,…or what's called a packet internet groper request,…which is an echo request and an echo reply.…So Host A is sending an echo request to Host B.…So we use ICMP to create this echo request payload.…
ICMP hands this payload to the IP protocol,…which then creates a packet.…The packet contains the IP source and destination address…and also has 010x in the protocol field.…Once the packet is created, IP determines…whether the destination IP address…is on the local network or a remote network.…Since it is a remote request,…the packet must be sent to the default gateway,…so we're gonna look in the registry…to find the default gateway IP address.…Then Host A is going to ARP for it,…or it's gonna look in its ARP cache first…
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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