Technical Terms - Internet (A-Z) - NAT

What does NAT stand for?

• Network Attached Technology

• Network Access Terminal

• Network Address Table

• Network Address Translation

What is the main purpose of NAT?

• To increase the speed of the network

• To translate multiple internal IP addresses to a single global IP address

• To block all incoming traffic from the Internet

• To provide unlimited IP addresses for all devices

How does NAT improve network security?

• By blocking all incoming traffic

• By obscuring the local IP addresses of individual computers from the outside

• By slowing down the network speed

• By revealing the local IP addresses of individual computers

Which device on a local network typically has a public and globally-unique IP address?

• The modem or gateway

• The computer with the highest processing power

• The network router

• Every device on the LAN

What does the network's router use NAT for when translating outgoing data packets?

• To change the source port number to a random number

• To block all outgoing data packets

• To change the destination IP address

• To change the source IP address to the gateway's public one

Why is NAT necessary for providing networked computers with an Internet connection?

• To provide unique IP addresses for every device

• To increase the speed of the Internet connection

• To overcome the limited address space of IPv4

• To limit the number of devices connected to the network

What is the main difference between IPv4 and IPv6 in terms of address space?

• IPv4 uses 32-bit addresses while IPv6 uses 128-bit addresses

• IPv4 is universally adopted while IPv6 is not

• IPv4 provides enough address space for several quadrillion unique devices while IPv6 does not

• IPv4 uses 128-bit addresses while IPv6 uses 32-bit addresses

How does NAT translate private IP addresses to a public IP address?

• By changing the destination IP address to the gateway's private IP address

• By using a unique port to identify the local computer

• By blocking all incoming data packets

• By changing the source IP address to a random public IP address

What does NAT do with the source port number of outgoing data packets?

• It changes the source port number to the destination port number

• It keeps the source port number the same

• It replaces the source port number with a new unique port number

• It removes the source port number

How does the router identify the destination of incoming data packets?

• By looking up the destination IP address in the NAT table

• By using the source IP address

• By checking the source port number

• By using the destination port number