World of Computer Networking Your CCNA start - Working of Network Address Translation (NAT)

The video tutorial explains how routers process IP packets by performing routing table lookups, decrementing TTL, and recalculating header checksums. It discusses how routers can modify packet headers, including source and destination IP addresses, especially when Network Address Translation (NAT) is enabled. The tutorial provides a detailed example of NAT, showing how private IP addresses are replaced with public ones for outgoing packets and vice versa for incoming packets. It concludes with an introduction to static NAT.

What actions does a router perform when it receives an IP packet?

What is the significance of the TTL and header checksum in the context of IP packets?

Explain how a router modifies the header of an IP packet during network address translation.

Describe the role of source and destination IP addresses in the process of network address translation.

How does a router handle incoming packets in relation to destination IP addresses after performing network address translation?