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单选题
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.
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更多 “单选题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.” 相关考题
考题
Within IS－IS, the restart helper performs which task?()
A. It sends CSNPs to the restarting router.B. It periodically sends TLV 211 to the restarting router.C. It informs other routers in the domain that a router has restarted.D. It tears down adjacency and sends its entire database after 30 seconds.
考题
By default, which IS－IS metric types does JUNOS software support?()
A. receiving of wide metrics onlyB. sending of narrow metrics onlyC. receiving of narrow metrics onlyD. sending and receiving of narrow and wide metrics
考题
There are three routers on a Gigabit Ethernet LAN: Router A, Router B, and Router C. Router A is the Designated Intermediate System (DIS) at Level 1 for that LAN. Router A‘s DIS priority is 64. The LAN is a Level 1-only link. Router D has just been powered up on that same LAN and its DIS priority is 80.Which statement is true?（）A. Router A remains the DIS and generates a new pseudonode LSP for that LANB. Router A remains the DIS and NO new pseudonode LSP is generated for that LANC. Router D becomes the new DIS, generates a new pseudonode LSP for that LAN, and purges the old pseudonode LSP generated by Router AD. Router D becomes the new DIS, does NOT generate a new pseudonode LSP for that LAN, and does NOT purge the old pseudonode LSP generated by Router A
考题
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.
考题
During OSPF adjacency formation, in which state is a router when it is sending LSA header information to its neighbor?()
A.AB.BC.CD.D
考题
In which two ways does the BGP graceful restart capability preserve prefix information during a restart？（）A、The peer router sends an end-of RIB message to the restarting routerB、The peer router immediately removes the BGP routes that it learned from the restarting router from its BGP routing tableC、The restarting router does not remove any stale prefixes after the timer for stale entries expiresD、The router establishes BGP sessions with other routers and relearns the BGP routes from other routers that are also capable of graceful restart. The restarting router waits to receive updates from the neighboring routers. When the neighboring routers send end-of-RIB messages to indicate that they are done sending updates， the restarting router starts sending its own updatesE、The restarting router removes any stale prefixes after the timer for stale entries expires
考题
What are the two benefits of graceful restart？（）A、Graceful restart allows session information recovery without disruption to the network.B、A node can perform a graceful restart to help a neighbor recover its state. The label bindings are kepton state information， which helps the failed node recover faster and does notaffect the current for wardtraffic.C、Graceful restart allows a node to recover state from its neighbor when there is no RP or before thedevice undergoes SSO.D、Graceful restart does not allow session information recovery.E、During a graceful restart， the router removes any stale prefixes after a timer for stale entries expires
考题
What does the LSP Holdtime field in an IS-IS database indicate?（）A、the LSP ageB、the LSP refresh intervalC、the LSP elapsed lifetimeD、the LSP remaining lifetime
考题
In which two ways does the BGP graceful capability preserve prefix information during a restart？（）A、The peer router immediately removes the BGP routers that it learned from the restarting router from itsBGP routing tables.B、The router establishes BGP sessions with other routers and relearns the BGP routes from others that are also capable of graceful restart. The restarting router waits to receive updates from the neighboringrouters. When the neighboring routers send end-of-RIB messages to indicate that they are donesending updates，the restarting router starts sending its own updates.C、The peer router sends an end-of-RIB message to the restarting router.D、The restarting router removes any stale prefixes after the timer for stale entries expires.E、The restarting router does not remove any stale prefixes after the timer for stale entries expires.
考题
By default, which IS-IS metric types does JUNOS software support?（）A、receiving of wide metrics onlyB、sending of narrow metrics onlyC、receiving of narrow metrics onlyD、sending and receiving of narrow and wide metrics
考题
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.
考题
During OSPF adjacency formation， what state is a router in when it is sending LSA header information to its neighbor？ （）A、 InitB、 2WayC、 ExStartD、 Exchange
考题
Within IS-IS, the restart helper performs which task?（）A、It sends CSNPs to the restarting router.B、It periodically sends TLV 211 to the restarting router.C、It informs other routers in the domain that a router has restarted.D、It tears down adjacency and sends its entire database after 30 seconds.
考题
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.
考题
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.
考题
There are three routers on a Gigabit Ethernet LAN: Router A, Router B, and Router C. Router A is the Designated Intermediate System (DIS) at Level 1 for that LAN. Router A's DIS priority is 64. The LAN is a Level 1-only link. Router D has just been powered up on that same LAN and its DIS priority is 80. Which statement is true?（）A、Router A remains the DIS and generates a new pseudonode LSP for that LANB、Router A remains the DIS and NO new pseudonode LSP is generated for that LANC、Router D becomes the new DIS, generates a new pseudonode LSP for that LAN, and purges the old pseudonode LSP generated by Router AD、Router D becomes the new DIS, does NOT generate a new pseudonode LSP for that LAN, and does NOT purge the old pseudonode LSP generated by Router A
考题
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
考题
In BGP graceful restart, how does a peer router indicate the end of a route exchange?（）A、an open message with the E bit setB、an update message with the E bit setC、an open message with an end-of-RIB markerD、an update message with an end-of-RIB marker
考题
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?（）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 prefixes into area 49.0001 using a Level 2 LSP it floods into the area.
考题
单选题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.
考题
单选题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
考题
单选题Within IS-IS, the restart helper performs which task?（）A
It sends CSNPs to the restarting router.B
It periodically sends TLV 211 to the restarting router.C
It informs other routers in the domain that a router has restarted.D
It tears down adjacency and sends its entire database after 30 seconds.
考题
单选题There are three routers on a Gigabit Ethernet LAN: Router A, Router B, and Router C. Router A is the Designated Intermediate System (DIS) at Level 1 for that LAN. Router A's DIS priority is 64. The LAN is a Level 1-only link. Router D has just been powered up on that same LAN and its DIS priority is 80. Which statement is true?（）A
Router A remains the DIS and generates a new pseudonode LSP for that LANB
Router A remains the DIS and NO new pseudonode LSP is generated for that LANC
Router D becomes the new DIS, generates a new pseudonode LSP for that LAN, and purges the old pseudonode LSP generated by Router AD
Router D becomes the new DIS, does NOT generate a new pseudonode LSP for that LAN, and does NOT purge the old pseudonode LSP generated by Router A
考题
单选题During OSPF adjacency formation， what state is a router in when it is sending LSA header information to its neighbor？ （）A
InitB
2WayC
ExStartD
Exchange
考题
多选题What are the two benefits of graceful restart？（）AGraceful restart allows session information recovery without disruption to the network.BA node can perform a graceful restart to help a neighbor recover its state. The label bindings are kepton state information， which helps the failed node recover faster and does notaffect the current for wardtraffic.CGraceful restart allows a node to recover state from its neighbor when there is no RP or before thedevice undergoes SSO.DGraceful restart does not allow session information recovery.EDuring a graceful restart， the router removes any stale prefixes after a timer for stale entries expires
考题
单选题What does the LSP Holdtime field in an IS-IS database indicate?（）A
the LSP ageB
the LSP refresh intervalC
the LSP elapsed lifetimeD
the LSP remaining lifetime
考题
多选题In which two ways does the BGP graceful capability preserve prefix information during a restart？（）AThe peer router immediately removes the BGP routers that it learned from the restarting router from itsBGP routing tables.BThe router establishes BGP sessions with other routers and relearns the BGP routes from others that are also capable of graceful restart. The restarting router waits to receive updates from the neighboringrouters. When the neighboring routers send end-of-RIB messages to indicate that they are donesending updates，the restarting router starts sending its own updates.CThe peer router sends an end-of-RIB message to the restarting router.DThe restarting router removes any stale prefixes after the timer for stale entries expires.EThe restarting router does not remove any stale prefixes after the timer for stale entries expires.
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