What is required to enable the use of metrics larger than 63 for traffic engineering in IS-IS？（）

单项选择题WhichisastepintheJUNOSsoftwareCSPFalgorithm？（）

A.Prune links that are bidirectional.
B.Eliminate paths with insufficient MTU
C.Eliminate paths of more than 15 hops.
D.Prune links that do not contain the included administrative group.

多项选择题WhatarethreeRSVPmessages？（）

A.PathErr：Path error
B.ResvErr：Reservation error
C.PathConf：Path confirmation
D.ResvConf：Reservation confirmation

单项选择题WhatistheoptimizetimeronanRSVP-signaledLabel-SwitchedPath（LSP）？（）

A.the time it takes to identify the optimal path for the LSP
B.the interval at which the ingress router recalculates the LSP’s path
C.the time the ingress router takes to establish the primary path
D.the maximum number of times the ingress router tries to establish the primary path

单项选择题Given the following LSP configuration， which statement is true？（） label-switched-pathlsp-xyz {  to 10.2000.1.1；  primarypath1；  secondarypath2；  secondarypath3；  no-cspf；  }  pathpath1 {  10.200.10.1 strict；  }  pathpath2 {  10.200.20.1 strict；  }  pathpath3 {  10.200.30.1loose  }

A.The router will use path1 when it is available and stable.
B.The router will use path3 when it is available and stable.
C.The router will attempt to establish path2 only when path1 and path3 are down.
D.The router will attempt to establish path1 only when path2 and path3 are down.

单项选择题IntowhichprotocolareLDPhellomessagesencapsulated？（）

A.IP
B.TCP
C.UDP
D.MPLS