多选题What are two uses of NAT？（）Aconserving public IP addressesBallowing stateful packet inspectionCpreventing unauthorized connections from outside the networkDallowing networks with overlapping private address space to communicate

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多选题

What are two uses of NAT？（）

conserving public IP addresses

allowing stateful packet inspection

preventing unauthorized connections from outside the network

allowing networks with overlapping private address space to communicate

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第1题：

What are two uses of the AS Path attribute?() (Choose two.)

A. route selection

B. loop avoidance

C. determining equal cost paths for reachablilty

D. defining the application of other BGP attributes

参考答案：A, B

第2题：

What are two characteristics of RIPv2?()

A. classful routing protocol

B. variable-length subnet masks

C. broadcast addressing

D. manual route summarization

E. uses SPF algorithm to compute path

参考答案：B, D

第3题：

Which two statements about static NAT are true? ()(Choose two.)

A. Static NAT can only be used with destination NAT.

B. Static NAT rules take precedence over overlapping dynamic NAT rules.

C. NAT rules take precedence over overlapping static NAT rules.

D. A reverse mapping is automatically created.

参考答案：B, D

第4题：

What are two benefits of using NAT?（）

A、NAT protects network security because privat enetworks are not advertised.
B、NAT accelerates the routing process because no modifications are made on the packets.
C、Dynamic NAT facilitates connections from the outside of the network.
D、NAT facilitates end-to-end communication when IPsec is enable.
E、NAT eliminates the need to re-address all host that require extemal access.
F、NAT conserves addresses through host MAC-level multiplexing.

正确答案:A,E

第5题：

what is the NAT overloading？

正确答案:Overloading—a form of dynamic NAT that maps multiple unregistered IP addresses to a single registered IP address （many to one） using different ports. This method is also known as Port Address Translation （PAT）.

第6题：

Which of the following network devices uses NAT to convert private IP addresses into public IPaddresses?()

A.NAS

B.Firewall

C.Hub

D.Bridge

参考答案：B

第7题：

What are the two benefits of any intelligent network that uses a systems-level approach to integrate applications and services across an infrastructure？（）

A、 reduce complexity
B、 reduced costs for all types of users
C、 packet inspection at wire speed
D、 QoS to the desktop
E、 LAN encryption services

正确答案:A,B

第8题：

Which two statements are correct regarding MPLS LSP establishment methods?() (Choose two.)

A. LDP uses Down Stream On Demand.

B. RSVP uses Down Stream On Demand.

C. LDP uses Down Stream Unsolicited.

D. RSVP uses Down Stream Unsolicited.

参考答案：B, C

第9题：

Which two statements about static NAT are true? （）(Choose two.)

A、Static NAT can only be used with destination NAT.
B、Static NAT rules take precedence over overlapping dynamic NAT rules.
C、NAT rules take precedence over overlapping static NAT rules.
D、A reverse mapping is automatically created.

正确答案:B,D

第10题：

What are two characteristics of RIPv2？（）

A、classful routing protocol
B、variable-length subnet masks
C、broadcast addressing
D、manual route summarization
E、uses SPF algorithm to compute path

正确答案:B,D

What are two uses of NAT？（）

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