多項(xiàng)選擇題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） domain
B.Level-1 routers use default routes installed based on ATT bit （Attach Bit） in announcements from Level-1-2（L1/L2） router
C.Level-1 routers use specific routes， for other Level-1 domain， announced by Level-1-2（L1/L2） by route-leaking feature of Cisco IOS
D.Level-1 routers use specific routes， for other Level-1 domain， announced by Level-2（L2） by route-leaking feature of Cisco IOS


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1.多項(xiàng)選擇題Which descriptions of Netflow is correct？（）

A.By default，Netflow records bidirectional IP traffic flow.
B.Netflow answers questions regarding IP traffic：who，what，where，when，and how
C.Netflow accounts for both transit traffic and traffic destined for the router.
D.Netflow returns the subinterface information in the flow records.

2.多項(xiàng)選擇題Which three attribute-value pairs （AVPs） must be present in L2TPv3 ICRQ messages？ （）

A.PW capabilities list
B.Message type
C.Assigned control connection ID
D.PW type
E.Remote session ID
F.Hostname

3.單項(xiàng)選擇題What best describes the usage of Route-Target rewrite？（）

A.Route-Target Rewrite is mainly used in Inter-AS MPLS-VPN deployments and is configured at the PErouter in originating AS ASBR to avoid misconfiguration in Route-Target assignment for VPN configurations.
B.Route-Target Rewrite is mainly used in Inter-AS MPLS-VPN deployments and is configured at the route-Reflector in originating AS ASBR to avoid misconfiguration in Route-Target assignment for VPN configurations.
C.Route-Target Rewrite is mainly used in Inter-AS MPLS-VPN deployments and is configured at the ASBR to avoid misconfiguration in Route-Target assignment for VPN configurations.
D.None of the above.

4.多項(xiàng)選擇題Select the three best answers which best describe Private Network-to Network Interface （PNNI） in an ATM network.（）

A.It is the Routing protocol used between ATM switches
B.PNNI uses the same Dijsktra algorithm for SPF calculation
C.PNNI and OSPF use the same Database to make cohesive decision for packet forwarding
D.PNNI measures line capacities and delays in addition to simple cost metrics

5.單項(xiàng)選擇題What OSPF LSA is used to support MPLS-traffic Engineering ？（）

A.External LSA （Type 5 ）
B.Opaque LSA （Type 9 ）
C.Opaque LSA （Type 10 ）
D.Opaque LSA （Type 11 ）
E.NSSA LSA （Type 7 ）