Question 1

What is the primary purpose of NAT?

Accepted Answer

conserve IPv4 addresses

Answer

enhance network performance

Answer

allow peer-to-peer file sharing

Answer

increase network security

Question 2

Which method is used by a PAT-enabled router to send incoming packets to the correct inside hosts?​

Accepted Answer

It uses the destination TCP or UDP port number on the incoming packet.

Answer

It uses the source TCP or UDP port number on the incoming packet.

Answer

It uses the source IP address on the incoming packet.

Answer

It uses a combination of the source TCP or UDP port number and the destination IP address on the incoming packet.

Question 3

What is a benefit of NAT?

Accepted Answer

It saves public IP addresses.

Answer

It makes troubleshooting routing issues easier.

Answer

It makes tunneling with IPsec less complicated.

Answer

It increases routing performance.

Question 4

What is a benefit of NAT?

Accepted Answer

It adds a degree of privacy and security to a network.

Answer

It makes tunneling with IPsec less complicated.

Answer

It makes troubleshooting routing issues easier.

Answer

It increases routing performance.

Question 5

What is a disadvantage of NAT

Accepted Answer

There is no end-to-end addressing.

Answer

The costs of readdressing hosts can be significant for a publicly addressed network.​

Answer

The internal hosts have to use a single public IPv4 address for external communication.

Answer

The router does not need to alter the checksum of the IPv4 packets.

Question 6

What is an advantage of deploying IPv4 NAT technology for internal hosts in an organization?

Accepted Answer

provides flexibility in designing the IPv4 addressing scheme

Answer

enables the easy deployment of applications that require end-to-end traceability

Answer

increases the performance of packet transmission to the Internet

Answer

makes internal network access easy for outside hosts using UDP

Question 7

Refer to the exhibit. Which address or addresses represent the inside global address?

Accepted Answer

209.165.20.25

Answer

any address in the 10.1.1.0 network

Answer

10.1.1.2

Answer

192.168.0.100

Question 8

Refer to the exhibit. A technician is configuring R2 for static NAT to allow the client to access the web server. What is a possible reason that the client PC cannot access the web server?

Accepted Answer

Interface S0/0/0 should be identified as the outside NAT interface.

Answer

The configuration is missing a valid access control list.

Answer

Interface Fa0/1 should be identified as the outside NAT interface.

Answer

The IP NAT statement is incorrect.

Question 9

A network administrator configures the border router with the command R1(config)# ip nat inside source list 4 pool corp. What is required to be configured in order for this particular command to be functional?

Accepted Answer

a NAT pool named corp that defines the starting and ending public IP addresses

Answer

an access list named corp that defines the private addresses that are affected by NAT

Answer

an access list numbered 4 that defines the starting and ending public IP addresses

Answer

ip nat outside to be enabled on the interface that connects to the LAN affected by the NAT

Question 10

When dynamic NAT without overloading is being used, what happens if seven users attempt to access a public server on the Internet when only six addresses are available in the NAT pool?

Accepted Answer

The request to the server for the seventh user fails.

Answer

The first user gets disconnected when the seventh user makes the request.

Answer

No users can access the server.

Answer

All users can access the server.

Question 11

What is defined by the ip nat pool command when configuring dynamic NAT?

Accepted Answer

the pool of global address

Answer

the range of internal IP addresses that are translated

Answer

The pool of available NAT servers

Answer

the range of external IP addresses that internal hosts are permitted to access

Question 12

Refer to the exhibit. What is the purpose of the command marked with an arrow shown in the partial configuration output of a Cisco broadband router?

Accepted Answer

defines which addresses can be translated

Answer

defines which addresses are allowed into the router

Answer

defines which addresses are assigned to a NAT pool

Answer

defines which addresses are allowed out of the router

Question 13

A network engineer has configured a router with the command ip nat inside source list 4 pool corp overload. Why did the engineer use the overload option?

Accepted Answer

The company has more private IP addresses than available public IP addresses.

Answer

The company has a small number of servers that should be accessible by clients from the Internet.

Answer

The company router must throttle or buffer traffic because the processing power of the router is not enough to handle the normal load of external-bound Internet traffic.

Answer

The company needs to have more public IP addresses available to be used on the Internet.

Question 14

What is one of the required steps to configure PAT?

Accepted Answer

Define a pool of global addresses to be used for overload translation.

Answer

Create a standard access list to define applications that should be translated.

Answer

Define the hello and interval timers to match the adjacent neighbor router.

Answer

Define the range of source ports to be used.

Question 15

What is one of the required steps to configure PAT?

Accepted Answer

Identify the inside interface.

Answer

Define the range of source ports to be used.

Answer

Create a standard access list to define applications that should be translated.

Answer

Define the hello and interval timers to match the adjacent neighbor router.

Question 16

What is the major benefit of using NAT with Port Address Translation?

Accepted Answer

It allows many internal hosts to share the same public IPv4 address.

Answer

It allows external hosts access to internal servers.

Answer

It provides a pool of public addresses that can be assigned to internal hosts.

Answer

It improves network performance for real-time protocols.

Question 17

What is the purpose of port forwarding?

Accepted Answer

Port forwarding allows an external user to reach a service on a private IPv4 address that is located inside a LAN.

Answer

Port forwarding allows for translating inside local IP addresses to outside local addresses.

Answer

Port forwarding allows users to reach servers on the Internet that are not using standard port numbers.

Answer

Port forwarding allows an internal user to reach a service on a public IPv4 address that is located outside a LAN.

Question 18

A network administrator is configuring a static NAT on the border router for a web server located in the DMZ network. The web server is configured to listen on TCP port 8080. The web server is paired with the internal IP address of 192.168.5.25 and the external IP address of 209.165.200.230. For easy access by hosts on the Internet, external users do not need to specify the port when visiting the web server. Which command will configure the static NAT?

Accepted Answer

R1(config)# ip nat inside source static tcp 192.168.5.25 8080 209.165.200.230 80

Answer

R1(config)# ip nat inside source static tcp 209.165.200.230 80 192.168.5.25 8080

Answer

R1(config)# ip nat inside source static tcp 192.168.5.25 80 209.165.200.230 8080

Answer

R1(config)# ip nat inside source static tcp 209.165.200.230 8080 192.168.5.25 80

Question 19

What is a characteristic of unique local addresses?

Accepted Answer

They allow sites to be combined without creating any address conflicts.

Answer

Their implementation depends on ISPs providing the service.

Answer

They are defined in RFC 3927.

Answer

They are designed to improve the security of IPv6 networks.

Question 20

Which statement describes IPv6 ULAs?

Accepted Answer

They are not routable across the Internet.

Answer

They are assigned by an ISP.

Answer

They conserve IPv6 address space.

Answer

They begin with the fe80::/10 prefix.

Question 21

Refer to the exhibit. Based on the output that is shown, what type of NAT has been implemented?

Accepted Answer

PAT using an external interface

Answer

static NAT with a NAT pool

Answer

dynamic NAT with a pool of two public IP addresses

Answer

static NAT with one entry

Question 22

NAT overload is also known as:

Accepted Answer

Port Address Translation

Answer

Network Address Translation

Answer

Network Address Overloading

Answer

Port Address Overloading

Related quizzes

Related quizzes