Chapter 27

This device is used for the gateway.

(a)  

• Router
• Modem
• Switch
• Bridge

What is the purpose of the gateway?

(a)  

• Route packets
• Receive data
• Monitor traffic
• Store information

Does this topology require a gateway?

• Yes

• No

What does NAT stand for?

(a)  

• Network Address Translation
• No Apples in Town
• Network Access Terminal
• Network Access Technology

What is the primary function of NAT?

• Translate from private to public address

• Encrypt data

• Monitor network traffic

• Create a secure connection

The difference between NAT and Proxy is…

• NAT eliminates the need to configure a Proxy/Sock on each client.

• NAT is a type of firewall while Proxy is a type of server.

• NAT is used to connect multiple networks while Proxy is used to connect multiple computers.

• NAT handles network traffic on a small scale.

Dynamic NAT...

• provides an automated mapping of inside local to inside global IP addresses.

• Establishes a one-to-one mapping of inside local to outside global IP addresses.

• always maps a private IP address to a public IP address.

• provides a mapping of internal host names to IP addresses.

The PCs on your company’s internal network are assigned IP addresses from DHCP servers, and the packets that they send to the internet are translated through a NAT-enabled router. What type of NAT enables the router to populate the translation table from a pool of unique public addresses, as the PCs send packets through the router to the internet?

• Dynamic NAT

• Static NAT

• Port Forwarding

• Network Address Translation

What is the purpose of port forwarding?

• Allows an external user to reach a service on a private IPv4 address that is located inside a LAN.

• Allows an external user to access a service on a public IPv4 address that is located inside a LAN.

• Allows an internal user to access a service on a public IPv4 address that is located outside a LAN.

• Allows an external user to access a service on a private IPv4 address that is located outside a LAN.

You want to examine the active NAT translations on a border router. Which command allows you to do this?

• sh ip nat translations

• sh ip route

• sh ip access-list

• show ip nat statistics