[Câu 29 pas4sure]

[blackspy]

Hình to quá,mình ko tiện post lên.
Mong các bạn chỉ rõ hộ câu 29 trong pas4sure nhé (v3.20=v3.22)
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Thanks!

[tranmyphuc]

Question 29 :
Study the exhibit carefully.NAT has been used for converting all the IP addresses on the internal netwrok to the single address 182.107.1.1 as trafic is routed toward the internet.Which of these statements accurately describes what will happen when the IP traffic returns from the internet destined for hosts on the internal network?



A.***-ER will require a route to 172.16.0.0/16 in its routing table to properly direct the traffic.
B.***-IR will convert the source IP addresses of all packets before forwarding them onto the internal netork.
C.***-ER will translate the destination IP addresses of all packets before forwarding them to ***-IR.
D.***-ER can use the directly conncted interface on the 128.107.0.0/27 network to route return traffic to its originators.

Answer:
D

Explanation:
NAT has been used for converting all the IP addresses on the internal netwrok to the single address 182.107.1.1 and this ip is set on ***-IR , so NAT is configured on ***-IR.
when ***-ER receives a packet whith the destination IP address of 182.107.1.1 it will looks into it's routing table to forwarding the packet.It can find this IP as a directly connected network so it will forward it to ***-IR.When ***-IR receives the packet it will translate the destination IP addres to a private IP address of the appropriate client and then it sends it to the correct network.

[Catherine]

CCNA Certification are a second (associate) he level Cisco Career certification. CCNA certification validates the ability to install, configure, operate and troubleshoot medium-sized routed and switched networks, incluyendo the implementation and verification of connections to remote sites in one WAN