FUNDAMENTALS OF COMPUTER

COMPUTER THREATS SECURITY

WHAT IS A FIREWALL IN NETWORK SECURITY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Network address and port translation is also referred to as ____ NAT
A
Dynamic
B
One-to-one
C
Port Forwarding
D
Static
Explanation: 

Detailed explanation-1: -Dynamic network address translation (Dynamic NAT) is a technique in which multiple public Internet Protocol (IP) addresses are mapped and used with an internal or private IP address.

Detailed explanation-2: -Dynamic NAT uses a pool of public addresses and assigns them according to the “first come, first served” principle. Port and Address Translation (PAT) is a form of dynamic NAT that maps several private addresses to a single public IP address.

Detailed explanation-3: -Dynamic NAT does Port Address Translation (PAT) along with IP address translation. Port numbers are used to distinguish which traffic belongs to which IP address. A single public IP address is used for all internal private IP addresses, but a different port number is assigned to each private IP address.

Detailed explanation-4: -NAT stands for network address translation. It’s a way to map multiple private addresses inside a local network to a public IP address before transferring the information onto the internet. Organizations that want multiple devices to employ a single IP address use NAT, as do most home routers.

Detailed explanation-5: -PAT (Port Address Translation)-Port Address Translation (PAT) is another type of dynamic NAT which can map multiple private IP addresses to a single public IP address by using a technology known as Port Address Translation.

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