单项选择题
In IS-IS， how does the restarting router inform its helpers that a restarts event occurred？（）
A.Sending out a graceful restart PDU
B.Sending an LSP that contains no TLVs.
C.Sending out a restarts TLV with the RR bit set.
D.Reflooding its LSP with a maximum sequence number.
相关考题
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单项选择题
YouhaveaLevel1-onlyrouter（RouterA）inIS-ISarea49.0001.HowdoesRouterAlearnhowtogettoIPprefixedinotherareas？（）
A.Router A must have a Level 2 adjacency with the Level 1/Level 2 router in area 49.0001.
B.The Level 1/Level 2 router in area 49.0001 sets the "attached" bit in the Level 2 LSP it floods into area 49.0001.
C.The Level 1/Level 2 router in area 49.0001 sets the "attached" bit in the Level 1 link-state PDU （LSP） it floods into area 49.0001.
D.The Level 1/Level 2 router in area 49.0001 advertises these prefixed into area 49.0001 using a Level 2 LSP it floods into the area. -
多项选择题
WhichtwoarevalidIS-ISPDUtypes？（）
A.broadcast hellos
B.Level 1 LAN hellos
C.Point-to-point hellos
D.Level 2 point-to-point hellos -
多项选择题
WhatarethreeapplicationsforfirewallfiltersinJUNOSsoftware？（）
A.route filtering
B.protect the routing engine
C.securing the router control plane
D.protect against hidden bridge loops
E.protect against denial of service attacks
