An OSPF non-backbone area follows external routes to be flooded within the area. These external routes are propagated into other areas. However， external routes from other areas are not allowed to enter this area. Which type of OSPF area does this describe？（）

单项选择题InJUNOSsoftware，whichcommandisusedtoconfigureTEDsupportforOSPF？（）

A.set protocols rsvp cspf-enable
B.set protocols mpls cspf-enable
C.set protocols rsvp traffic-engineering
D.set protocols ospf traffic-engineering

单项选择题Whatisrequiredtoenabletheuseofmetricslargerthan63fortrafficengineeringinIS-IS？（）

A.Nothing， wide metrics are used by default in IS-IS
B.Enable wide-metrics-only under protocol IS-IS
C.Enable traffic-engineering under protocols IS-IS
D.Disable TVL’s 2 and 128 which carry the 6-bit metrics （0-63）.

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