CCNA - Chapter 9: Network Address Translation (NAT) Explained | Static NAT, Dynamic NAT & PAT
In Chapter 9 of the CyberEd CCNA series, we explore one of the most important networking technologies used on modern networks, Network Address Translation (NAT).
NAT allows devices using private IPv4 addresses to communicate with the public internet while conserving valuable public address space. It is used in almost every home and enterprise network.
In this chapter, you will learn:
• Why IPv4 address exhaustion led to the development of NAT
• How NAT works in private and public networks
• NAT terminology and operation
• The differences between Static NAT, Dynamic NAT, and PAT (NAT Overload)
• How to configure NAT on a Cisco IOS router
By the end of this chapter, you’ll understand both the theory and configuration of NAT, an essential topic for the CCNA certification and real-world networking environments.
In the next chapter, we will begin implementing important network services such as NTP, DHCP, and other IP operations on Cisco devices.
📧 Questions?
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Timestamps:
00:00 Intro
00:39 In this chapter
01:11 The Challenge of Using IPv4 on the Internet
01:38 RFC 1918 and Private Addressing
02:27 Understanding NAT
02:44 How NAT Works (Basic Flow)
03:52 Advantages and Disadvantages of NAT
04:31 Understanding NAT Operation and Terminology
05:06 NAT Address Types
05:39 NAT Operation
06:16 Types of NAT
06:27 Static NAT (One-to-One Mapping)
07:18 Dynamic NAT (Many-to-Many Using a Pool)
08:23 PAT (Port Address Translation / NAT Overload)
09:13 Port Forwarding (Static NAT with Ports)
10:16 Summary