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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
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
By default, how often does an ERX Edge Router send an OSPF link－state advertisement in a stable network?()
A.AB.BC.CD.D
考题
By default,how does the router handle changes to its operational configuration?()
A.Changes are not implemented,but are saved automatically.B.Changes are no timplemented and must be written into memory.C.Changes are implemented immediately and save dautomatically.D.Changes are implemented immediately,but must be written intomemory.
考题
How many simultaneous Telnet sessions does a Cisco router support by default?()
A.1B.2C.3D.4E.5F.6
考题
By default, how often does a router running IGRP send its complete routing table to its neighbors?()
A. Every 5 minutesB. Every 90 secondsC. Every 60 secondsD. Every 30 seconds
考题
Which statement is true about a distributed call control environment and the processing of dialed digits from an IP phone？（）A、The router that is directly connected to the IP phone will look up the called number in its call routing table.B、The router that is directly connected to the IP phone will inform its call agent when a service request is detected.C、When the IP phone is picked up，the IP phone initiates the service request.D、The directly connected router passes the collected digits to its call agent，and the call agent looks up in its call-routing table the called number.
考题
Host 1 is trying to communicate with Host 2. The e0 interface on Router C is down. Which of the following are true (Choose two.)（）。A、Router C will use ICMP to inform Host 1 that Host 2 cannot be reachedB、Router C will use ICMP to inform Router B that Host 2 cannot be reachedC、Router C will use ICMP to inform Host 1, Router A, and Router B that Host 2 cannot be reachedD、Router C will send a Destination Unreachable message typeE、Router C will send a Router Selection message typeF、Router C will send a Source Quench message type
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 prefixed 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 prefixed into area 49.0001 using a Level 2 LSP it floods into the area.
考题
Host 1 is trying to communicate with Host 2. The e0 interface on Router C is down. Which of the following are true?（）A、Router C will use ICMP to inform Host 1 that Host 2 cannot be reached.B、Router C will use ICMP to inform Router B that Host 2 cannot be reached.C、Router C will use ICMP to inform Host 1, Router A, and Router B that Host 2 cannot be reached.D、Router C will send a Destination Unreachable message type.E、Router C will send a Router Selection message type.F、Router C will send a Source Quench message type.
考题
A router has EIGRP configured as the only routing protocol. How does EIGRP respond if there is no feasible successor route to a destination network and the successor route fails?（）A、It immediately sends its entire routing table to its neighbors.B、EIGRP sends a Hello packet to the DR to inform it of the route failure.C、It automatically forwards traffic to a fallback default route until a successor route is found.D、It sends queries out to neighbors until a new successor route is found.E、It places the route in holddown until LSA updates inform it of a new route to the network.
考题
By default, how often does a router running IGRP send its complete routing table to its neighbors?（）A、Every 5 minutesB、Every 90 secondsC、Every 60 secondsD、Every 30 seconds
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
How does the ERX Edge Router interact with an external DHCP server in a Bridged 1483 network？（）A、It maintains DHCP leases on behalf of subscribers.B、It initiates DHCP requests on behalf of subscribers.C、It passes DHCP traffic to and from the server;you must configure static host routes.D、It passes DHCP traffic to and from the server and inserts host routes into its routing table.
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 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
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.
考题
多选题In which two ways does the BGP graceful restart capability preserve prefix information during a restart？（）AThe peer router sends an end-of RIB message to the restarting routerBThe peer router immediately removes the BGP routes that it learned from the restarting router from its BGP routing tableCThe restarting router does not remove any stale prefixes after the timer for stale entries expiresDThe 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 updatesEThe restarting router removes any stale prefixes after the timer for stale entries expires
考题
单选题How does a coast radio station communicating by HF radio normally identify itself?（）A
By its subscriber numberB
By its call signC
By its MMSID
By its MID
考题
单选题A router has EIGRP configured as the only routing protocol. How does EIGRP respond if there is no feasible successor route to a destination network and the successor route fails?（）A
It immediately sends its entire routing table to its neighbors.B
EIGRP sends a Hello packet to the DR to inform it of the route failure.C
It automatically forwards traffic to a fallback default route until a successor route is found.D
It sends queries out to neighbors until a new successor route is found.E
It places the route in holddown until LSA updates inform it of a new route to the network.
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Which statement is true about a distributed call control environment and the processing of dialed digits from an IP phone？（）A
The router that is directly connected to the IP phone will look up the called number in its call routing table.B
The router that is directly connected to the IP phone will inform its call agent when a service request is detected.C
When the IP phone is picked up，the IP phone initiates the service request.D
The directly connected router passes the collected digits to its call agent，and the call agent looks up in its call-routing table the called number.
考题
单选题What is the function of the helper router during a restart event in OSPF?（）A
Sends Rapid Hellos to the restarting router.B
Maintains Adjancency with restarting router.C
Sends periodic DD packets to the restarting router.D
Floods Type 9 LSAs to all routers indicating a restarting event.
考题
单选题By default,how does the router handle changes to its operational configuration?（）A
Changes are not implemented,but are saved automatically.B
Changes are no timplemented and must be written into memory.C
Changes are implemented immediately and save dautomatically.D
Changes are implemented immediately,but must be written intomemory.
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 get to IP prefixed 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 prefixed into area 49.0001 using a Level 2 LSP it floods into the area.
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