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 module 10

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Registration date : 2007-02-22

PostSubject: module 10   Fri Nov 30, 2007 5:43 pm

CCNP 2
Chapter 10
An application that uses a physical name will not reach a destination on the other side of a NAT router. How can this issue be resolved?

implement NAT overload
implement a separate NAT source address pool
implement a separate NAT destination pool
implement a static NAT translation X
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
What is the purpose of this group of router configuration commands?

RTA(config)# ip nat pool outlocal 192.168.3.1 192.168.3.254 prefix-length 24
RTA(config)#ip nat pool inglobal 192.168.1.1 192.168.1.254 prefix-length 24
RTA(config)#ip nat inside source list 2 pool inglobal
RTA(config)#ip nat outside source list 2 pool outlocal
RTA(config)#access-list 2 permit 10.1.1.0 0.0.0.255

separation of subnet traffic
load distribution with NAT
NAT overload with dynamic addressing
support overlapping network addresses X
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
What is the default amount of time that an entry remains in a NAT table on a router?

60 seconds
300 seconds
12 hours
24 hours X
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
When using NAT, which router interface is most commonly bound to a private network?

serial
BRI
AUX
Ethernet X
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
How many bytes of router DRAM does each NAT entry consume?

100
120
160 X
240
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Which command is used to determine when an inside global address is being used for overloading inside local addresses?

show nat translations
show ip nat translations X
show ip nat
show ip nat inside global address
show ip nat overload translations
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
What is an advantage of NAT overloading?

One internal IP address can be translated to one external address.
Many internal IP addresses can be translated to one external address. X
One external IP address can be translated to one internal address.
Many external IP addresses can be translated to one internal address.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Which NAT command displays all active translations?

show ip nat dynamic
show ip nat translations X
show ip nat statistics
debug ip nat
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Based on the output in the graphic, which type of NAT is in effect?



static
dynamic
round robin
dynamic overloading X
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
What is a purpose of using an ACL in a NAT configuration?

to determine local hosts for translation X
to determine a pool of global addresses
to determine load balance characteristics
to determine the global private address range
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Which NAT address is the IP address of an outside host as it appears to the inside network?

inside global IP address
outside global IP address
outside local IP address X
simple translation entry
extended translation entry
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
For traffic entering the network, which NAT process is used when one global address is mapped to multiple inside addresses?

congestion
overlapping
TCP load distribution X
overloading
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Which characteristics can be observed after implementing NAT? (Choose two.)

reduced switching paths
loss of end-to-end IP traceability X
reduced flexibility when connecting to the Internet
increased number of registered addresses
reduced address overlap X
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
What is NAT overload?

mapping one global address to multiple inside addresses X
mapping one inside address to multiple outside addresses
one-to-one dynamic mapping to a NAT pool until the available addresses are almost depleted
mapping a specific inside local address to a pre-specified outside global address
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
The following output appears after entering the debug ip nat command.

NAT*: s=10.1.1.1-->192.168.2.1, d=172.16.2.3 [1]

What does the asterisk indicate?

This packet is the first packet in a conversation.
This packet is coming from a source address that is using TCP load distribution.
This packet was translated through the fast path. X
This is a packet trace from a sniffer.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Which NAT command is typically applied to the interface associated with the private network?

ip nat inside X
ip nat outside
ip nat inside static
ip nat outside static
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Which router command allows a trace on a NAT operation?

trace ip nat
debug ip nat X
show ip nat
show ip nat translations
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Which command is used to explicitly show inside and outside interfaces?

RTB#show ip nat translations
RTB#show ip nat translations verbose
RTB#show ip nat statistics X
RTB#debug ip nat
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
What address relationship(s) are indicated by the NAT table?



Inside addresses overlap with outside addresses. X
Inside addresses overlap with other inside addresses.
Outside addresses overlap with other outside addresses.
No address overlapping is occurring.
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