The three MSR routers RTA, RTB, and RTC are connected to the same frame relay network through their respective S1/0 interfaces. This frame relay network can provide enough PVC resources. As a network engineer, you need to assign IP addresses to these frame relay interfaces.
Which of the following statements is incorrect?

• A.Under the premise of correct routing configuration, three routers can communicate through this frame relay network with only one IP subnet.
• B.Under the premise of correct routing configuration, three routers can communicate through this frame relay network without configuring sub-interfaces.
• C.If transit through any router is not allowed, at least two IP subnets are required to enable three routers to communicate with each other through this frame relay network
• D.If transit through any router is not allowed, at least three IP subnets are required to realize the two-by-two intercommunication of the three routers through this frame relay network

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Use the ______ command to view the NAT table entries.

• A.display nat entry
• B.display nat session
• C.display nat
• D.display nat table

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The rate of the D channel in ISDN PRI is ______.

• A.16 Kbps
• B.64 Kbps
• C.54 Kbps
• D.36 Kbps

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The customer's network connection looks like:
HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB
The network has been correctly configured with the IP address and routing. Currently, HostA and HostB can communicate with each other in the network.
For some security considerations, the customer requires that HostB cannot ping HostA, but at the same time HostA can ping HostB, and the transmission of other messages between HostA and HostB is not restricted, so which of the following statements is correct?

• A.This requirement can be achieved only by configuring ACL on MSR-2
• B.Only configuring ACL on MSR-1 cannot achieve this requirement
• C.When using the ping command, the ICMP packets between the two hosts are bidirectional, and this single intercommunication requirement cannot be realized
• D.This requirement can be achieved only by configuring ACL on MSR-1
• E.Only configuring ACL on MSR-2 cannot achieve this requirement

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Which of the following is the correct IPv6 address? (multiple choice)

• A.2001:410:0:1::45FF
• B.2001:410::1:0:0:0:45FF
• C.2001:410:0:1:0:0:0:45FF
• D.2001:410:0:1:0:0:0:0:45FF
• E.2001:410:0:1:45FF

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