單項選擇題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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2.單項選擇題在七十年代末，國際標準化組織ISO提出了開放系統(tǒng)互連參考模型。協(xié)議分層大大簡化了網(wǎng)絡(luò)協(xié)議的復(fù)雜性，在OSI7層模型中，網(wǎng)絡(luò)層的功能主要是（）。

A.在信道上傳輸原始的比特流
B.加強物理層數(shù)據(jù)傳輸原始比特流的功能并且進行流量調(diào)控
C.確定數(shù)據(jù)包從源端到目的端如何選擇路由
D.確保到達對方的各段信息正確無誤

3.單項選擇題PPP驗證成功后，將由Authenticate階段轉(zhuǎn)入什么階段？（）

A.Dead
B.Establish
C.Network
D.Terminate

4.單項選擇題OSI代表（）。

A.Organization for Standards Institute
B.Organization for Internet Standards
C.Open Standards Institute
D.Open Systems Interconnection

5.單項選擇題What is the purpose of the inverse ARP？（）

A.to map a known DLCI to an IP address
B.to mapa known IP address to a MAC address
C.to map known SPID toa MAC address
D.to map a known DLCI to a MAC address
E.to map a known IP address to a SPID
F.to mapa known MAC address to an IP address