单选题ATT （Attached ）bit needs to be set in the link state PDUs in an IS-IS level-1-2 router to indicate that theyare a potential exit point out of the area.（）ATrueBFalse
单选题
ATT （Attached ）bit needs to be set in the link state PDUs in an IS-IS level-1-2 router to indicate that theyare a potential exit point out of the area.（）
A
True
B
False
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相关考题：
What is the purpose of IS－IS level boundaries?() A. Restrain the formation of adjacencies.B. Control the flooding scope of link-state PDUs.C. Partition the L2 backbone into multiple domains.D. Aggregate L1 domains into a contiguous backbone.
You have a Level 1－only router (Router A) in IS－IS area 49.0001. How does Router A learn how to get to IP prefixes in other areas?() 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 1 link-state PDU (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 2 LSP it floods into area 49.0001.D. The Level 1/Level 2 router in area 49.0001 advertises these prefixes into area 49.0001 using a Level 2 LSP it floods into the area.
ATT(Attached)bitneedstobesetinthelinkstatePDUsinanIS－ISlevel－1－2routertoindicatethattheyareapotentialexitpointoutofthearea.() A.TrueB.False
What information does a router running a link－state protocol use to build and maintain its topological database?() A. hello packetsB. SAP messages sent by other routersC. LSAs from other routersD. beacons received on point-to-point linksE. routing tables received from other link-state routersF. TTL packets from designated routers
What bit should be set in the link state PDUs in an IS-IS level-1-2 router to indicate that they are a potentialexit point out of the area ？（）A、ATT（Attached）bitB、IS-Type bitsC、P（Partition）bitD、Down bitE、PN（Pseudonode）biyF、ABR（Area Border Rorter）bit
ATT （Attached ）bit needs to be set in the link state PDUs in an IS-IS level-1-2 router to indicate that theyare a potential exit point out of the area.（）A、TrueB、False
使得吸盘吸取工件，“设置二元输出动作”正确的选项是（）。A、Set OUT[1]=TrueB、Set OUT[1]=FalseC、Set OUT[]=TrueD、Set OUT[]=False
What information does a router running a link-state protocol use to build and maintain its topological database？ （）A、 hello packetsB、 SAP messages sent by other routers C、 LSAs from other routersD、 beacons received on point-to-point linksE、 routing tables received from other link-state routersF、 TTL packets from designated routers
You have a Level 1-only router (Router A) in IS-IS area 49.0001. How does Router A learn how to get to IP prefixes in other areas?（）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 1 link-state PDU (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 2 LSP it floods into area 49.0001.D、The Level 1/Level 2 router in area 49.0001 advertises these prefixes into area 49.0001 using a Level 2 LSP it floods into the area.
Which two statements are correct regarding IS-IS？（）A、Routers maintain a single link-state database per area.B、Routers maintain a separate Level 1 link-state database.C、Routers maintain a separate Level 2 link-state database.D、Routers maintain a single Level 1 link-state database per area.
In IS-IS， how does the restarting router inform its helpers that a restarts event occurred？（）A、Sending out a graceful restart PDUB、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.
In IS-IS， how long will the restart helper keep the restarting router in the up state？（）A、The hello dead timer expires.B、The restart duration timer expires.C、The restarting router sets the down bit.D、The restart helper sends out three CSNPs.
In IS-IS, how long will the restart helper keep the restarting router in the up state?（）A、until the hello dead timer expiresB、until the restart duration timer expiresC、until the restarting router sets the down bitD、until the restart helper sends out three CSNPs
In BGP graceful restart， how does a peer router indicate the end of a route exchange？（）A、An open message with the E bit set.B、An update message with the E bit set.C、An open message with an end-of-RIB marker.D、An update message with an end-of-RIB marker.
What is the purpose of IS-IS level boundaries?（）A、Restrain the formation of adjacencies.B、Control the flooding scope of link-state PDUs.C、Partition the L2 backbone into multiple domains.D、Aggregate L1 domains into a contiguous backbone.
单选题ATT （Attached ）bit needs to be set in the link state PDUs in an IS-IS level-1-2 router to indicate that theyare a potential exit point out of the area.（）ATrueBFalse
单选题What bit should be set in the link state PDUs in an IS-IS level-1-2 router to indicate that they are a potentialexit point out of the area ？（）AATT（Attached）bitBIS-Type bitsCP（Partition）bitDDown bitEPN（Pseudonode）biyFABR（Area Border Rorter）bit
多选题What information does a router running a link-state protocol use to build and maintain its topological database? （）Ahello packetsBSAP messages sent by other routersCLSAs from other routersDbeacons received on point-to-point linksErouting tables received from other link-state routersFTTL packets from designated routers
单选题What is the purpose of IS-IS level boundaries?（）ARestrain the formation of adjacencies.BControl the flooding scope of link-state PDUs.CPartition the L2 backbone into multiple domains.DAggregate L1 domains into a contiguous backbone.
单选题You have a Level 1-only router (Router A) in IS-IS area 49.0001. How does Router A learn how to reach prefixes in other areas?（）ARouter A must have a Level 2 adjacency with the Level 1/Level 2 router in area 49.0001.BThe Level 1/Level 2 router in area 49.0001 sets the attached bit in the Level 2 LSP it floods into area 49.0001.CThe 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.DThe Level 1/Level 2 router in area 49.0001 advertises these prefixes into area 49.0001 using a Level 2 LSP it floods into the area.
单选题In IS-IS， how long will the restart helper keep the restarting router in the up state？（）AThe hello dead timer expires.BThe restart duration timer expires.CThe restarting router sets the down bit.DThe restart helper sends out three CSNPs.
单选题In BGP graceful restart， how does a peer router indicate the end of a route exchange？（）AAn open message with the E bit set.BAn update message with the E bit set.CAn open message with an end-of-RIB marker.DAn update message with an end-of-RIB marker.
单选题In IS-IS, how long will the restart helper keep the restarting router in the up state?（）Auntil the hello dead timer expiresBuntil the restart duration timer expiresCuntil the restarting router sets the down bitDuntil the restart helper sends out three CSNPs
单选题Which of following is used to periodically multicast by DIS on a LAN to ensure IS-IS link state databaseaccuracy？（）ALSPBPSNPCISHDCSNPEIIH
单选题In IS-IS， how does the restarting router inform its helpers that a restarts event occurred？（）ASending out a graceful restart PDUBSending an LSP that contains no TLVs.CSending out a restarts TLV with the RR bit set.DReflooding its LSP with a maximum sequence number.
单选题Routers A and B are connected with a point-to-point OC-3 interface. Each router's OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in the same area. How many IS-IS adjacencies exist between the two routers?（）A0B1C2D3