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多項選擇題Which two data intergrity algorithms are commonly used in VPN solutions?（）

A.HMAC-MD5
B.RSA
C.HMAC-SHA-1
D.DH1
E.DH2

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1.多項選擇題Which commands are required to properly configure a router to properly configure a router to run OSPF and to add network 192.168.16.0/24 to OSPF area 0？（）

A.Router（config）#router ospf 1
B.Router（config）#router ospf 0
C.Router（config）#router ospf area 0
D.Router（config-router）#network 192.168.16.0 0.0.0.255 area 0
E.Router（config-router）#network 192.168.16.0 0.0.0.255 0
F.Router（config-router）#network 192.168.16.0 255.255.255.0 area 0

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2.單項選擇題為什么交換機從未學習一個廣播地址？（）

A.廣播幀不會發(fā)送到swiches。
B.廣播地址，使用不正確的格式轉(zhuǎn)換表。
C.廣播地址永遠不會是一個幀的源地址。
D.廣播只使用網(wǎng)絡層地址。
E.廣播幀永遠不會被交換機轉(zhuǎn)發(fā)。

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3.單項選擇題 圖上面反映了什么問題，配置什么可以防止這種問題?（）

A.路由環(huán)路，抑制計時器
B.交換回路，水平分割
C.路由環(huán)路，水平分割
D.交換回路，VTP
E.路由環(huán)路，STP
F.交換回路，STP

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4.多項選擇題Which are three reasons that an organization with multiple branch offices and roaming users might implement a Cisco VPN solution instead of point-to-point WAN links?（）

A.reduced cost
B.better throughput
C.increased security
D.scalability
E.reduced latency
F.broadband incompatibility

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5.單項選擇題What is the result of issuing the frame-relay map ip 192.168.1.2 202 broadcast command?（）

A.defines the source IP address that is used in all broadcast packets on DLCI 202
B.defines the DLCI that is used for all packets that are sent to the 192.168.1.2 IP address
C.defines the destination IP address that is used in all broadcast packets on DLCI 202
D.defines the DLCI on which packets from the 192.168.1.2 IP address are received

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