CIS 225 Unit 6(NAT Characteristics) Check Your Understandings & Quiz Mastercut

dynamic NAT

A company designs its network so that the PCs in the internal network are assigned IP addresses from DHCP servers, and the packets that are sent 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? static NAT PAT ARP dynamic NAT

dynamic NAT overload using the pool of addresses

A company has been assigned the 203.0.113.0/27 block of IP addresses by the ISP. The company has over 6000 internal devices. What type of NAT would be most appropriate for the employee workstations of the company? dynamic NAT port forwarding dynamic NAT overload using the pool of addresses PAT off the external router interface static NAT

Router# show ip nat translations

A network administrator wants to examine the active NAT translations on a border router. Which command would perform the task? Router# debug ip nat translations Router# show ip nat translations Router# show ip nat statistics Router# clear ip nat translations

Inside Global

Refer to the exhibit. Into what type of address has the IPv4 address for PC1 been translated (i.e., 209.165.200.226)? Outside Local Inside Local Outside Global Inside Global

Inside Local

Refer to the exhibit. What type of NAT address is the IP address of PC1 (i.e., 192.168.10.10)? Outside Local Inside Local Outside Global Inside Global

Outside Global

Refer to the exhibit. What type of NAT address is the IP address of the Web Server (i.e., 209.165.201.10)? Outside Local Inside Local Outside Global Inside Global

True

True or False? A side effect of NAT is that it hides the inside local IP address of a host from the outside network. True False

False

True or False? The use of NAT makes end-to-end traceability between source and destination easier. True False

True

True or False? Tunneling protocols such as IPsec do not work well through NAT. True False

False

True or False? With NAT overload, each inside local IP address is translated to a unique inside global IP address on a one-for-one basis. True False

inside local

Using NAT terminology, what is the address of the source host on a private network as seen from inside the network? outside global inside local inside global outside local

An inside local address is translated to a specified inside global address.

What address translation is performed by static NAT? An inside local address is translated to a specified outside local address. An inside local address is translated to a specified outside global address. An inside local address is translated to a specified inside global address. An outside local address is translated to a specified outside global address.

Create a mapping between the inside local and inside global addresses. Identify the participating interfaces as inside or outside interfaces.

What are two tasks to perform when configuring static NAT? (Choose two.) Create a mapping between the inside local and inside global addresses. Identify the participating interfaces as inside or outside interfaces. Define the outside global address. Define the inside global address on the server Configure a NAT pool.

It allows sites to connect IPv6 hosts to an IPv4 network by translating the IPv6 addresses to IPv4 addresses.

What benefit does NAT64 provide? It allows sites to use private IPv4 addresses, and thus hides the internal addressing structure from hosts on public IPv4 networks. It allows sites to connect IPv6 hosts to an IPv4 network by translating the IPv6 addresses to IPv4 addresses. It allows sites to use private IPv6 addresses and translates them to global IPv6 addresses. It allows sites to connect multiple IPv4 hosts to the Internet via the use of a single public IPv4 address.

There is no end-to-end addressing.

What is a disadvantage of NAT? The costs of readdressing hosts can be significant for a publicly addressed network.​ There is no end-to-end addressing. The internal hosts have to use a single public IPv4 address for external communication. The router does not need to alter the checksum of the IPv4 packets.​

allows internal IP addresses to be concealed from external users

What is a security feature of using NAT on a network? denies all internal hosts from communicating outside their own network allows external IP addresses to be concealed from internal users denies all packets that originate from private IP addresses allows internal IP addresses to be concealed from external users

Changing ISPs is simpler because the devices on the inside network do not have to be configured with new addresses when the outside address changes.

What is one advantage of using NAT at the edge of the network? Dynamic NAT allows devices from outside the local network to easily initiate TCP connections to inside hosts. Changing ISPs is simpler because the devices on the inside network do not have to be configured with new addresses when the outside address changes. NAT enables end-to-end IPv4 traceability, making troubleshooting easier. Performance is significantly increased because the router does not have to perform as many route lookups.

The request to the server for the seventh user fails.

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? All users can access the server. The first user gets disconnected when the seventh user makes the request. The request to the server for the seventh user fails. No users can access the server.

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

Which statement accurately describes dynamic NAT? It provides a mapping of internal host names to IP addresses. It provides an automated mapping of inside local to inside global IP addresses. It dynamically provides IP addressing to internal hosts. It always maps a private IP address to a public IP address.

NAT introduces problems for some applications that require end-to-end connectivity. NAT provides a solution to slow down the IPv4 address depletion.

Which two statements accurately describe an advantage or a disadvantage when deploying NAT for IPv4 in a network? (Choose two.) NAT adds authentication capability to IPv4. NAT improves packet handling. NAT introduces problems for some applications that require end-to-end connectivity. NAT will impact negatively on switch performance. NAT causes routing tables to include more information. NAT provides a solution to slow down the IPv4 address depletion.

PAT

Which version of NAT allows many hosts inside a private network to simultaneously use a single inside global address for connecting to the Internet? dynamic NAT PAT static NAT port forwarding

Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large.​

Why is NAT not needed in IPv6?​ The problems that are induced by NAT applications are solved because the IPv6 header improves packet handling by intermediate routers.​ Because IPv6 has integrated security, there is no need to hide the IPv6 addresses of internal networks.​ The end-to-end connectivity problems that are caused by NAT are solved because the number of routes increases with the number of nodes that are connected to the Internet. Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large.​