[单选]
Refer to the exhibit. Looking at the topology diagram and the partial router configurations shown, which statement is true? （）

A . The NProuter has two OSPF neighbors in the "Full" adjacency state
B . The NProuter serial0/0 interface has the OSPF dead timer set to 10 seconds
C . The NProuter serial0/0 interface has been configured with an OSPF network type of "pointtopoint"
D . The 10.1.1.1 and 10.1.1.2 routers are not using the default OSPF dead and hello timers setting
E . The "Mismatched" error is caus ed by the expiration of the OSPF timer

机制森田疗法 When is a switched network that is running the Spanning Tree Protocol considered to be fully converged?（） when all switches have the same BID as the root switch。 when all switches have received the MAC address of each neighboring switch。 when every enabled switch port has been assigned a unique identifier。 when every operating switch port is in either the blocking or forwarding state。 when all switches are in either client, server, or transparent mode。钢的表面淬火的优点是（）。提高表面硬度，保持芯部韧性。提高耐磨性。提高表面抗疲劳强度。提高弹性模量。提高强度。中国的互联网处在发展的上升阶段，发展潜力较大。

Refer to the exhibit. Looking at the topology diagram and the partial router configurations shown, which statement is true? （）

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[单选] Refer to the exhibit. Looking at the topology diagram and the partial router configurations shown, which statement is true? （）

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[单选]
Refer to the exhibit. Looking at the topology diagram and the partial router configurations shown, which statement is true? （）