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問答題 VLAN 60 和VLAN 80的流量能否通信，為什么？

參考答案： NO，because vlan 60 is not allowed&e...

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1.單項選擇題In BGP routing，what does the rule of synchronization mean？（）

A.A BGP router can only advertise an EBGP learned route，provided that the route is an IGP route in the routing table.
B.A BGP router can only advertise an IBGP learned route，provided that the route is an IGP route in the routing table.
C.A BGP router can only advertise an IBGP learned route，provided that the route is an IGP route that is not in the routing table.
D.A BGP router can only advertise an EBGP learned route，provided that the route is a metric of 0 in the BGP table.

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2.單項選擇題You have a router running BGP for the MPLS network and OSPF for the local LAN network at the sales office. A route is being learned from the MPLS network that also exists on the OSPF local network.It is important that the router chooses the local LAN route being learned from the downstream switch running OSPF rather than the upstream BGP neighbor. Also，if the local OSPF route goes away，the BGP route needs to be used. What should be configured to make sure that the router will choose the LAN network as the preferred path？（）

A.static route needs to be added
B.floating static route needs to be added
C.bgp backdoor command
D.ospf backdoor command

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3.單項選擇題Which RMON group stores statistics for conversations between sets of two addresses？（）

A.hostTopN
B.matrix
C.statistics
D.history
E.packet capture
F.host

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4.問答題DHCP的防止欺騙的機制是什么？

參考答案：DHCP snooping

5.單項選擇題Which of the following is the encryption algorithm used for priv option when using SNMPv3？（）

A.HMAC-SHA
B.HMAC-MD5
C.CBC-DES
D.AES
E.3DES

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