What is the default maximum number of equal-cost paths that can be placed into the routing of a cisco OSPF router?（）

A.16
B.2
C.unlimited
D.4

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多项选择题

Which two states are the port states when RSTP has converged？（）

A.blocking
B.learning
C.disabled
D.forwarding
E.listening

单项选择题

A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch assumes the role as root bridge（）。

A.Establish a direct link from the switch to all other switches in the network.
B.Assign the switch a higher MAC address than the other switches in the network have.
C.Configure the switch so that it has a lower priority than other switches in the network.
D.Configure the switch for full-duplex operation and configure the other switches for half-duplex operation.
E.Connect the switch directly to the MDF router, which will force the switch to assume the role of root bridge.

单项选择题

Host1的用户想PING DSL调制解调器/路由器的192.168.1.254，ARP表如下图，Host1会怎么操作？（）

A.发送一个单播ARP包到DSL调制解调器/路由器
B.发送一个单播ICMP包到DSL调制解调器/路由器
C.发送三层广播包到响应的DSL调制解调器/路由器
D.发送一个可以被Host2，the switch，and the DSL modem/router 受到的2层广播帧

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