题目内容
（请给出正确答案）
A. LSPs are bidirectional.
B. LSPs are unidirectional.
C. LSPs must follow the IGP‘s shortest path.
D. LSPs can follow paths other than the IGP‘s shortest path.
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（由简答题聘请的专业题库老师提供的解答）
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A、The group of phubbers is expanding.
B、Video-streaming websites are getting less users.
C、Online live broadcasts are rocketing.
D、Internet financing is booming.
E、Online food ordering and delivery services are prospering.
A.A
B.B
C.C
D.D
A.IP address
B.magic number
C.WINS assignment
D.Domain Name Server
A.If a switch is used, the collision domain includes all devices connected to the switch.
B.If a hub is used, the collision domain includes all devices connected to the hub.
C.If a hub is used, the collision domain is limited to each device and the hub.
D.If a switch is used, the collision domain is limited to each device and the switch.
A.The ERX router sends an Active Discovery Off ermessage.
B.The ERX router sendsan Active Discovery Initiation message.
C.The customer device sends an Active Discovery Offer message.
D.The customer device sends an Active Discovery Initiation message.
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