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What is periodically sent by a DIS on a LAN to ensure that all adjacent neighbors' IS － IS link － state databases are synchronized?()
A. complete SNP (CSNP)
B. partial SNP (PSNP)
C. database query
D. database description packet (DDP)
E. link - state summary
F. hello
参考答案
更多 “ What is periodically sent by a DIS on a LAN to ensure that all adjacent neighbors' IS － IS link － state databases are synchronized?() A. complete SNP (CSNP)B. partial SNP (PSNP)C. database queryD. database description packet (DDP)E. link - state summaryF. hello ” 相关考题
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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
There are three IS-IS routers on a Gigabit Ethernet segment: Router A, Router B, and Router C. Each router is configured in the same area and each routers Gigabit Ethernet interface is configured for Level 1-only. Router A is the Designated Intermediate System (DIS). Each routers IP address on that segment is:Router A: 10.1.1.1/24Router B: 10.1.1.2/24Router C: 10.2.2.1/26Which statement is true about all the adjacencies that exist on that LAN?（）A. No routers are adjacent with each other.B. Only Router A and Router B are adjacent at Level 1.C. Only Router A and Router B are adjacent at Level 2.D. All three routers are adjacent with each other at Level 1.
考题
What are the different characteristics of distance vector and link state routing protocols?()
A. Distance vector protocols send the entire routing table to directly connected neighbors.B. Distance vector protocols are responsible for sending updates to all networks listed in the routing table.C. Link state protocols are responsible for sending the entire routing table to the whole network.D. Link state protocols send updates regarding their own links status to all other routers on the network.E. None of the above
考题
While troubleshooting some connectivity issues，you issue the “show ip ospf database”in order to ex amine the link state database. Which three of the statements below are true regarding the OSPF link state database（）A.Each router has an identical link state database.B.External routes are imported into a separate link state database.C.Syn chronization of link state databases is maintained via floodingo f LSAs.D.Information in the link state database is used to build a routing table by calculating a shortest-path tree.E.By default,link state databases are refreshede very 10 minutes in the absence of topology changes.
考题
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
考题
What is periodically sent by a DIS on a LAN to ensure that all adjacent neighbors' IS - IS link - state databases are synchronized?（）A、complete SNP (CSNP)B、partial SNP (PSNP)C、database queryD、database description packet (DDP)E、link - state summaryF、hello
考题
Which of following is used to periodically multicast by DIS on a LAN to ensure IS-IS link state databaseaccuracy？（）A、LSPB、PSNPC、ISHD、CSNPE、IIH
考题
On switch R1 you issue the "udld enable" global command. What does this command accomplish？ （）A、 Enables all fiber-optic LAN ports for Unidirectional LINK Detection （UDLD）B、 Enables all copper media LAN ports Unidirectional Link Detection （UDLD）C、 Overrides the default UDLS setting for all portsD、 Globally enables all ports on the device for Unidirectional Link Detection （UDLS）E、 None of the other alternatives apply
考题
Open Shortes t Path First (OSPF) is a routing protocol developed for Internet Protocol (IP) networks by the Interior Gateway Protocol (IGP) working group of the Internet Engineering Task Force (IETF). Which two statements best describe the OSPF link - state routing pro tocol?（）A、OSPF sends updates every 10 secondsB、OSPF sends triggered updates when a network change occursC、When a link state is changed, the router that detected the change creates a link - state advertisement (LSA) and propagates it to all OSPF devices using the 224.0.0.6 multicast addressD、OSPF sends summaries of individual link- state entries every 30 minutes to ensure LSDB synchronization
考题
Which of the following is used to periodically multicast by DIS on a LAN to ensure IS-IS link state databaseaccuracy？（）A、CSNPB、LSPC、ISHD、HelloE、IIHF、PSNP
考题
What are the different characteristics of distance vector and link state routing protocols?（）A、Distance vector protocols send the entire routing table to directly connected neighbors.B、Distance vector protocols are responsible for sending updates to all networks listed in the routing table.C、Link state protocols are responsible for sending the entire routing table to the whole network.D、Link state protocols send updates regarding their own links status to all other routers on the network.E、None of the above
考题
What is periodically multicasted （every 10 seconds） by the DIS on a LAN to ensure IS-IS Link StateDatabase accuracy？（）A、PSNPB、CSNPC、LSPD、IIHE、ISH
考题
The statements below compare and contrast link state and distance vector routing protocols. Which of these are true?（）A、Distance vector protocols send the entire routing table to directly connected neighbors.B、Distance vector protocols are responsible for sending updates to all networks listed in the routing table.C、Link state protocols are responsible for sending the entire routing table to the whole network.D、Link state protocols send updates regarding their own links status to all other routers on the network.
考题
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
考题
What does a router do if it has no EIGRP feasible successor route to a destination network and the successor route to that destination network is inactive status?（）A、It routes all traffic that is addresses to the destination network to the interface indicates in the routing table.B、It sends a copy of its neighbor table to all adjacent routers.C、It sends a multicast query packet to all adjacent neighbors requesting available routing paths to the destination network.D、It broadcasts Hello packets to all routers in the network to re-establish neighbor adjacencies.
考题
单选题On switch R1 you issue the "udld enable" global command. What does this command accomplish？ （）A
Enables all fiber-optic LAN ports for Unidirectional LINK Detection （UDLD）B
Enables all copper media LAN ports Unidirectional Link Detection （UDLD）C
Overrides the default UDLS setting for all portsD
Globally enables all ports on the device for Unidirectional Link Detection （UDLS）E
None of the other alternatives apply
考题
单选题What does a router do if it has no EIGRP feasible successor route to a destination network and the successor route to that destination network is inactive status?（）A
It routes all traffic that is addresses to the destination network to the interface indicates in the routing table.B
It sends a copy of its neighbor table to all adjacent routers.C
It sends a multicast query packet to all adjacent neighbors requesting available routing paths to the destination network.D
It broadcasts Hello packets to all routers in the network to re-establish neighbor adjacencies.
考题
单选题What is periodically sent by a DIS on a LAN to ensure that all adjacent neighbors' IS - IS link - state databases are synchronized?（）A
complete SNP (CSNP)B
partial SNP (PSNP)C
database queryD
database description packet (DDP)E
link - state summaryF
hello
考题
单选题What is periodically multicasted （every 10 seconds） by the DIS on a LAN to ensure IS-IS Link StateDatabase accuracy？（）A
PSNPB
CSNPC
LSPD
IIHE
ISH
考题
单选题Which of following is used to periodically multicast by DIS on a LAN to ensure IS-IS link state databaseaccuracy？（）A
LSPB
PSNPC
ISHD
CSNPE
IIH
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
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
考题
多选题While troubleshooting some connectivity issues， you issue the "show ip ospf database" in order toexamine the link state database. Which three of the statements below are true regarding theOSPF link state database？（）AEach router has an identical link state databaseBExternal routes are imported into a separate link state databaseCSynchronization of link state databases is maintained via flooding of LSAsDInformation in the link state database is used to build a routing table by calculating a shortest-path treeEBy default， link state databases are refreshed every 10 minutes in the absence of topologychanges
考题
多选题What are the different characteristics of distance vector and link state routing protocols?（）ADistance vector protocols send the entire routing table to directly connected neighbors.BDistance vector protocols are responsible for sending updates to all networks listed in the routing table.CLink state protocols are responsible for sending the entire routing table to the whole network.DLink state protocols send updates regarding their own links status to all other routers on the network.ENone of the above
考题
多选题The statements below compare and contrast link state and distance vector routing protocols. Which of these are true?（）ADistance vector protocols send the entire routing table to directly connected neighbors.BDistance vector protocols are responsible for sending updates to all networks listed in the routing table.CLink state protocols are responsible for sending the entire routing table to the whole network.DLink state protocols send updates regarding their own links status to all other routers on the network.
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