Two Level 1 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?（）A、An Adjacency is formed.B、No IS-IS PDUs are sentC、An Adjacency does not form.D、An Adjacency forms but traffic is not forwarded.
Two Level 1 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?（）
- A、An Adjacency is formed.
- B、No IS-IS PDUs are sent
- C、An Adjacency does not form.
- D、An Adjacency forms but traffic is not forwarded.
相关考题：
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?（）A.0B.1C.2D.3
Two Level 1 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?() A. An Adjacency is formed.B. No IS-IS PDUs are sentC. An Adjacency does not form.D. An Adjacency forms but traffic is not forwarded.
Two Level 2 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?() A. An Adjacency is formed.B. No IS-IS PDUs are sent.C. An Adjacency does not form.D. An Adjacency forms but traffic is not forwarded.
Which two conditions, when met, allow an IS－IS Level 2 router to be considered attached?() A. You can reach other Level 2 routers.B. It can reach at least one other defined area.C. The router is reachable by at least two ES-IS nodes.D. It has at least one enabled reachable prefix with a valid metric defined.
Which two statements are true by default of a multilevel IS－IS network?() A. Level 1 only routers see routes contained in their area.B. Level 1 routers route towards Level 2 routers due to the attached bit.C. Level 2 routers route towards Level 1 routers due to the attached bit.D. Level 2 routers can see routes in other Level 2 areas and routes originated in Level 1 areas.
Routers A and B are connected with a point-to-point OC-3 interface. Each routers OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in different areas. How many IS-IS adjacencies exist between the two routers?（）A.0B.1C.2D.3
Which two statements are true about IS － IS?() A.Interfaces have a default metric of 1.B.Level 1 is intra - area and level 2 is interarea.C.Level 1 routing is between an end system (ES) and IS while Level 2 routing is between an IS and IS.D. Hosts send ISHs while routers send ESHs.E. IS - IS is an open standard.F. Metrics depend on interface speed.
How do routers in an IS-IS Level-1 domain exit to reach other Level-1 （L1） domains？（）A、Level-1（L1） routers use default routes announced by Level-2（L2） routers in Level-1（L1） domainB、Level-1 routers use default routes installed based on ATT bit （Attach Bit） in announcements from Level-1-2（L1/L2） routerC、Level-1 routers use specific routes， for other Level-1 domain， announced by Level-1-2（L1/L2） by route-leaking feature of Cisco IOSD、Level-1 routers use specific routes， for other Level-1 domain， announced by Level-2（L2） by route-leaking feature of Cisco IOS
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 across multiple areas.
Which two statements about IS reachability TLV (TLV 2) and the extended IS reachability (TLV 22) are true?（）A、TLV 22 supports wide metrics.B、TLV 2 is only used in Level 1 routers.C、TLV 22 displays the neighbor's extended areas.D、Only TLV 22 can support the inclusion of sub-TLVs.
Two Level 2 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?（）A、An Adjacency is formed.B、No IS-IS PDUs are sent.C、An Adjacency does not form.D、An Adjacency forms but traffic is not forwarded.
Which two are characteristics of link-state routing protocols?（） (Choose two.)A、Routers choose a best path for a destination based on the SPF algorithm.B、All routers in a given area or level build a consistent database describing the network's topology.C、Routers choose the best path for a destination based on the interface on which they received the link stateadvertisement with the lowest cost.D、All routers in a given area or level forward link state advertisements between interfaces in the same area or level, adding their metric to the link state advertisement's cost information when they forward it.
Routers A and B are connected with a point-to-point OC-3 interface. Each routers OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in different areas. How many IS-IS adjacencies exist between the two routers?（）A、0B、1C、2D、3
Which two statements about the IS -IS routing protocol are true?（）A、IS - IS is capable of supporting IPv4 and IPv6.B、IS - IS is only capable of supporting IPv4 and CLNS.C、IS - IS routers use ES - IS hellos (ESH) to establish and to maintain neighbor relationships.D、IS - IS routers run the Bellman - Ford algorithm against their LSDBs to pick the best paths.E、Level 1 routers learn about paths within the area of which they are a part.F、Level 2 routers learn about paths both within areas and between areas.
Which two statements are true about IS - IS?（）A、Interfaces have a default metric of 1.B、Level 1 is intra - area and level 2 is interarea.C、Level 1 routing is between an end system (ES) and IS while Level 2 routing is between an IS and IS.D、Hosts send ISHs while routers send ESHs.E、IS - IS is an open standard.F、Metrics depend on interface speed.
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.
Which two conditions, when met, allow an IS-IS Level 2 router to be considered attached?（）A、You can reach other Level 2 routers.B、It can reach at least one other defined area.C、The router is reachable by at least two ES-IS nodes.D、It has at least one enabled reachable prefix with a valid metric defined.
多选题Which two are characteristics of link-state routing protocols?（） (Choose two.)ARouters choose a best path for a destination based on the SPF algorithm.BAll routers in a given area or level build a consistent database describing the network's topology.CRouters choose the best path for a destination based on the interface on which they received the link stateadvertisement with the lowest cost.DAll routers in a given area or level forward link state advertisements between interfaces in the same area or level, adding their metric to the link state advertisement's cost information when they forward it.
多选题Which two statements are true by default of a multilevel IS-IS network?（）ALevel 1 only routers see routes contained in their area.BLevel 1 routers route towards Level 2 routers due to the attached bit.CLevel 2 routers route towards Level 1 routers due to the attached bit.DLevel 2 routers can see routes in other Level 2 areas and routes originated in Level 1 areas.
单选题Routers A and B are connected with a point-to-point OC-3 interface. Each routers OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in different areas. How many IS-IS adjacencies exist between the two routers?（）A0B1C2D3
多选题Which two statements are true about IS - IS?（）AInterfaces have a default metric of 1.BLevel 1 is intra - area and level 2 is interarea.CLevel 1 routing is between an end system (ES) and IS while Level 2 routing is between an IS and IS.DHosts send ISHs while routers send ESHs.EIS - IS is an open standard.FMetrics depend on interface speed.
单选题Two Level 2 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?（）AAn Adjacency is formed.BNo IS-IS PDUs are sent.CAn Adjacency does not form.DAn Adjacency forms but traffic is not forwarded.
多选题How do routers in an IS-IS Level-1 domain exit to reach other Level-1 （L1） domains？（）ALevel-1（L1） routers use default routes announced by Level-2（L2） routers in Level-1（L1） domainBLevel-1 routers use default routes installed based on ATT bit （Attach Bit） in announcements from Level-1-2（L1/L2） routerCLevel-1 routers use specific routes， for other Level-1 domain， announced by Level-1-2（L1/L2） by route-leaking feature of Cisco IOSDLevel-1 routers use specific routes， for other Level-1 domain， announced by Level-2（L2） by route-leaking feature of Cisco IOS
单选题Two Level 1 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?（）AAn Adjacency is formed.BNo IS-IS PDUs are sentCAn Adjacency does not form.DAn Adjacency forms but traffic is not forwarded.
多选题Which two conditions, when met, allow an IS-IS Level 2 router to be considered attached?（）AYou can reach other Level 2 routers.BIt can reach at least one other defined area.CThe router is reachable by at least two ES-IS nodes.DIt has at least one enabled reachable prefix with a valid metric defined.
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 different areas.How many IS-IS adjacencies exist between the two routers？（）A0B1C2D3
单选题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: 10.1.1.1/24 Router B: 10.1.1.2/24 Router C: 10.2.2.1/26 Which statement is true about all the adjacencies that exist on that LAN?（）ANo routers are adjacent with each other.BOnly Router A and Router B are adjacent at Level 1.COnly Router A and Router B are adjacent at Level 2.DAll three routers are adjacent with each other at Level 1.