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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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

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.

8.單項選擇題訪問控制列表配置中，操作符“greater-than portnumber”表示控制的是（）。

A.端口號小于此數(shù)字的服務(wù)
B.端口號大于此數(shù)字的服務(wù)
C.端口號等于此數(shù)字的服務(wù)
D.端口號不等于此數(shù)字的服務(wù)

9.單項選擇題dialertimeridle這條命令的意思是設(shè)置（）。

A.鏈路空閑時間
B.忙端口的空閑時間
C.鏈路斷開時間
D.端口數(shù)據(jù)可以發(fā)送等待時間

10.多項選擇題Which three statements about RSTP are true？（）

A.RSTP significantly reduces topology reconverging time after a link failure.
B.RSTP expends the STP port roles by adding the alternate and backup roles.
C.RSTP port atates are blocking，discarding，learing，orforwarding.
D.RSTP also uses the STP proprsal-agreement sequence.
E.RSTP use the same timer-baseed processas STP on point-to-pointlinks.
F.RSTP provides a faster transition to the forwarding state on point-to-point links than STP does.

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