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Questions and Answers
What is the main purpose of using Network Address Translation (NAT) in the context of IPv4 address exhaustion?
What is the main purpose of using Network Address Translation (NAT) in the context of IPv4 address exhaustion?
- To allocate new public IP addresses
- To eliminate the need for private IP addresses
- To increase the number of available devices by allowing them to share a single public IP address (correct)
- To provide encryption for data communication
What is the primary function of Source Network Address Translation (SNAT) and Port Address Translation (PAT)?
What is the primary function of Source Network Address Translation (SNAT) and Port Address Translation (PAT)?
- Modify both the IP address and port number for translation purposes (correct)
- Modify the domain name of the devices
- Change the private IP address to a public IP address
- Allocate new private IP addresses for devices
What is the significance of the IP address ranges 10.0.0.0-10.255.255.255, 172.16.0.0-172.31.255.255, 192.168.0.0-192.168.255.255?
What is the significance of the IP address ranges 10.0.0.0-10.255.255.255, 172.16.0.0-172.31.255.255, 192.168.0.0-192.168.255.255?
- They are reserved for public IP addresses
- They are assigned to devices without the need for translation
- They are used exclusively for SNAT purposes
- They are defined as private IP addresses in RFC 1918 (correct)
How does NAT enable devices with private IP addresses to communicate with devices on the public internet?
How does NAT enable devices with private IP addresses to communicate with devices on the public internet?
Why is the IPv4 address space considered exhausted?
Why is the IPv4 address space considered exhausted?
What role does the router play in Network Address Translation (NAT)?
What role does the router play in Network Address Translation (NAT)?
What is the primary mechanism used to increase the number of available devices in the context of IPv4 address space exhaustion?
What is the primary mechanism used to increase the number of available devices in the context of IPv4 address space exhaustion?
What is the main purpose of using Port Address Translation (PAT) in the context of NAT?
What is the main purpose of using Port Address Translation (PAT) in the context of NAT?
What is the significance of the IP address ranges 10.0.0.0-10.255.255.255, 172.16.0.0-172.31.255.255, 192.168.0.0-192.168.255.255?
What is the significance of the IP address ranges 10.0.0.0-10.255.255.255, 172.16.0.0-172.31.255.255, 192.168.0.0-192.168.255.255?
What role does a router play in the context of Network Address Translation (NAT)?
What role does a router play in the context of Network Address Translation (NAT)?
Why is the IPv4 address space considered exhausted?
Why is the IPv4 address space considered exhausted?
How does Source Network Address Translation (SNAT) facilitate communication with public addresses?
How does Source Network Address Translation (SNAT) facilitate communication with public addresses?
What technology is used to increase the number of available devices to communicate with the public internet in the context of IPv4 address space exhaustion?
What technology is used to increase the number of available devices to communicate with the public internet in the context of IPv4 address space exhaustion?
What is the primary function of Source Network Address Translation (SNAT) and Port Address Translation (PAT) in the context of NAT?
What is the primary function of Source Network Address Translation (SNAT) and Port Address Translation (PAT) in the context of NAT?
Why is the IPv4 address space considered exhausted?
Why is the IPv4 address space considered exhausted?
What role does a router play in the context of Network Address Translation (NAT)?
What role does a router play in the context of Network Address Translation (NAT)?
What is the main purpose of using Port Address Translation (PAT) in the context of NAT?
What is the main purpose of using Port Address Translation (PAT) in the context of NAT?
What is the significance of the IP address ranges 10.0.0.0-10.255.255.255, 172.16.0.0-172.31.255.255, 192.168.0.0-192.168.255.255?
What is the significance of the IP address ranges 10.0.0.0-10.255.255.255, 172.16.0.0-172.31.255.255, 192.168.0.0-192.168.255.255?
What is the primary purpose of using Network Address Translation (NAT) in the context of IPv4 address space exhaustion?
What is the primary purpose of using Network Address Translation (NAT) in the context of IPv4 address space exhaustion?
How does Source Network Address Translation (SNAT) facilitate communication with public addresses?
How does Source Network Address Translation (SNAT) facilitate communication with public addresses?
What is the significance of the IP address ranges 10.0.0.0-10.255.255.255, 172.16.0.0-172.31.255.255, 192.168.0.0-192.168.255.255?
What is the significance of the IP address ranges 10.0.0.0-10.255.255.255, 172.16.0.0-172.31.255.255, 192.168.0.0-192.168.255.255?
What is the primary function of Port Address Translation (PAT) in the context of NAT?
What is the primary function of Port Address Translation (PAT) in the context of NAT?
Why is the IPv4 address space considered exhausted?
Why is the IPv4 address space considered exhausted?
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Study Notes
- Over 20 billion devices on the internet, but IPv4 only supports 4.29 billion addresses
- IPv4 address space exhausted, no easy way to obtain new public IP addresses
- Use Network Address Translation (NAT) to increase number of available devices
- Private IP addresses defined in RFC 1918: 10.0.0.0-10.255.255.255, 172.16.0.0-172.31.255.255, 192.168.0.0-192.168.255.255
- NAT allows devices with private IP addresses to communicate with public addresses
- Router provides translation functionality by changing private source IP to public IP
- When information is sent back to a private address, router reverses IP translation
- NAT can handle multiple IP addresses by using Source Network Address Translation (SNAT), Port Address Translation (PAT), or NAT overload
- SNAT/PAT: router modifies both IP address and port number to make translation
- Router creates table to map private IP and public IP/port combination
- When Professor Messer web server sends information back, router looks up mapping and sends traffic to correct private IP address.
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