World of Computer Networking Your CCNA start - End-to-End Internet Protocol (IP) Packet Transmission - Part 2

The video tutorial explains the process of packet forwarding in a network. It begins with the router receiving a packet at its Gigabit 0/0 interface, performing decapsulation, and checking the routing table to determine the next hop. The router sends an ARP request to resolve the MAC address of the destination host. After receiving the MAC address, the router decrements the TTL, updates the header checksum, and encapsulates the packet with a new Ethernet header. Finally, the router transmits the Ethernet frame through the appropriate interface.

What does the router do when it receives a packet with a destination IP address that does not match any configured addresses?

Explain how the router verifies the routing table when trying to find a matching route.

Describe the process the router follows to determine the destination MAC address of a host in a directly connected network.

What happens when the router sends a broadcast ARP request?

What is the significance of the TTL field in the IP packet, and how does the router modify it?

How does the router encapsulate the IP packet before sending it out?

What are the differences between the old Ethernet header and the new Ethernet header added by the router?