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
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？（）
A
0
B
1
C
2
D
3
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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.
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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 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.
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The administrator is unable to establish connectivity between two Cisco routers. Upon reviewing the command output of both routers, what is the most likely caust of the problem?() A.Authentication needs to be changed to PAP for both routers.B.Serial IP addresses of routers are not on the same subnet.C.Username/password is incorrectly configured.D.Router names are incorrectly configured.
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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.
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
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
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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The administrator is unable to establish connectivity between two Cisco routers. Upon reviewing the command output of both routers, what is the most likely caust of the problem?（）AAuthentication needs to be changed to PAP for both routers.BSerial IP addresses of routers are not on the same subnet.CUsername/password is incorrectly configured.DRouter names are incorrectly configured.
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