單項選擇題下面哪一組是Quidway路由器封裝x.25協(xié)議默認(rèn)的窗口WIN、編號方式MOD、分組OPS的缺省值？（）

A.2、8、128
B.8、8、128
C.8、128、8
D.2、128、128


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1.單項選擇題PPP協(xié)議中，（）主要用于協(xié)商在該數(shù)據(jù)鏈路上所傳輸?shù)臄?shù)據(jù)包的格式與類型。

A.鏈路控制協(xié)議（LCP）
B.PPP擴(kuò)展協(xié)議
C.網(wǎng)絡(luò)層控制協(xié)議族（NCPS）
D.PAP、CHAP協(xié)議

2.多項選擇題幀中繼LMI一般占用哪幾個DLCI？（）

A.0
B.16
C.1007
D.1023

3.單項選擇題VLAN 3 is not yet configured on your switch. What happens if you set the switchport access vlan3 commmand interface configuration mode？（）

A.The command is accepted and the respective VLAN is added to vlan dat.
B.The command is rejected.
C.The command is accepted and you must configure the VLAN manually.
D.The port turns amber.

5.單項選擇題What occurs on a Frame Relay network when the CIR is exceeded?（）

A.All TCP traffic is marked discard eligible
B.All UDP traffic is marked discard eligible and a BECN is sent
C.All TCP traffic is marked discard eligible and a BECN is sent
D.All traffic exceeding the CIR is marked discard eligible