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多項選擇題Which two statements about static NAT translations are true？（）

A.They are always present in the NATt able.
B.They allow connection to be initiated from the outside.
C.They can be configured with access lists，to allow two or more connections to be initiated from the outside.
D.They require no inside or outside interface markings because addresses are statically defined.

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1.單項選擇題Which IPsec security protocol should be used when confidentiality is required？（）

A.AH
B.MB5
C.PSK
D.ESP

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2.單項選擇題Wich command can you use to manually assign a static IPV6 address to a router interface?（）

A.ipv6 address PREFIX_1::1/64
B.ipv6 autoconfig 2001:db8:2222:7272::72/64
C.ipv6 autoconfig
D.ipv6 address 2001:db8:2222:7272::72/64

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3.單項選擇題 In order to allow the establishment of a Telnet session with a router, which set of commands must be configured（）。

A.A
B.B
C.C
D.D
E.E
F.F

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4.單項選擇題If an Ethernet port on a router was assigned an IP address of 172.1.1.1/20，what is the maximum number of host sallowed on this subnet？（）

A.4094
B.1024
C.8190
D.2046
E.4096

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5.單項選擇題Why will a switch never learn a broadcast address？（）

A.Broadcast frames are never sent to swiches.
B.Broadcast addresses use an incorrect format for the switching table.
C.A broadcast address will never be the source address of a frame.
D.Broadcasts only use network layer addressing.
E.A broadcast frame is never forwarded by aswitch.

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