Question # 1 You are configuring a BGP signaled Layer 2 VPN across your MPLS enabled core network. Your PE-2 device connects to two sites within the s VPN
In this scenario, which statement is correct? A. By default on PE-2, the site's local ID is automatically assigned a value of 0 and must be configured to match the total number of attached sites.B. You must create a unique Layer 2 VPN routing instance for each site on the PE-2 device.C.
You must use separate physical interfaces to connect PE-2 to each site.D. By default on PE-2, the remote site IDs are automatically assigned based on the order that you add the interfaces to the site configuration.
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D. By default on PE-2, the remote site IDs are automatically assigned based on the order that you add the interfaces to the site configuration.
Question # 2 Which two statements are correct about a sham link? (Choose two.) A. It creates an OSPF multihop neighborship between two PE routers. B. It creates a BGP multihop neighborship between two PE routers. C. The PEs exchange Type 1 OSPF LSAs instead of Type 3 OSPF LSAs for the L3VPN routes D. The PEs exchange Type 3 OSPF LSAs instead of Type 1 OSPF LSAs for the L3VPN routes.
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A. It creates an OSPF multihop neighborship between two PE routers. C. The PEs exchange Type 1 OSPF LSAs instead of Type 3 OSPF LSAs for the L3VPN routes
Answer Description Explanation:
A sham link is a logical link between two PE routers that belong to the same OSPF area but are connected through an L3VPN. A sham link makes the PE routers appear as if they are directly connected, and prevents OSPF from preferring an intra-area back door link over the VPN backbone. A sham link creates an OSPF multihop neighborship between the PE routers using TCP port 646. The PEs exchange Type 1 OSPF LSAs instead of Type 3 OSPF LSAs for the L3VPN routes, which allows OSPF to use the correct metric for route selection1.
Question # 3 In IS-IS, which two statements are correct about the designated intermediate system (DIS) on a multi-access network segment? (Choose two)
A. A router with a priority of 10 wins the DIS election over a router with a priority of 1.B. A router with a priority of 1 wins the DIS election over a router with a priority of 10.C. On the multi-access network, each router forms an adjacency to every other router on the segmentD. On the multi-access network, each router only forms an adjacency to the DIS.
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A. A router with a priority of 10 wins the DIS election over a router with a priority of 1.D. On the multi-access network, each router only forms an adjacency to the DIS.
Question # 4 An interface is configured with a behavior aggregate classifier and a multifield classifier How will the packet be processed when received on this interface? A. The packet will be discarded.B.
The packet will be processed by the BA classifier first, then the MF classifier.C. The packet will be forwarded with no classification changes.D. The packet will be processed by the MF classifier first, then the BA classifier.
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C. The packet will be forwarded with no classification changes.
Question # 5 Which two statements about IS-IS are correct? (Choose two.) A. CSNPs are flooded periodically.B. PSNPs are flooded periodically.C. PSNPs contain only descriptions of LSPs.D. CSNPs contain only descriptions of LSPs.
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A. CSNPs are flooded periodically.C. PSNPs contain only descriptions of LSPs.
Question # 6 When using OSPFv3 for an IPv4 environment, which statement is correct? A. OSPFv3 only supports IPv4. B. OSPFv3 supports both IPv6 and IPv4, but not in the same routing instance. C. OSPFv3 is not backward compatible with IPv4 D. OSPFv3 supports IPv4 only on interfaces with family inet6 defined
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D. OSPFv3 supports IPv4 only on interfaces with family inet6 defined
Question # 7 Which three mechanisms are used by Junos platforms to evaluate incoming traffic for CoS purposes? (Choose three ) A. Rewrite rules B. Behavior aggregate classifiers C. Traffic shapers D. Fixed classifiers E. Multifield Classifiers
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B. Behavior aggregate classifiers D. Fixed classifiers E. Multifield Classifiers
Answer Description Explanation:
Junos platforms use different mechanisms to evaluate incoming traffic for CoS purposes, such as:
Behavior aggregate classifiers: These classifiers use a single field in a packet header to classify traffic into different forwarding classes and loss priorities based on predefined or user-defined values.
Fixed classifiers: These classifiers use a fixed field in a packet header to classify traffic into different forwarding classes and loss priorities based on predefined values.
Multifield classifiers: These classifiers use multiple fields in a packet header to classify traffic into different forwarding classes and loss priorities based on user-defined values and filters. Rewrite rules and traffic shapers are not used to evaluate incoming traffic for CoS purposes, but rather to modify or shape outgoing traffic based on CoS policies.
Question # 8 Which two statements are correct about the customer interface in an LDP-signaled pseudowire? (Choose two) A. When the encapsulation is vlan-ccc or extended-vlan-ccc, the configured VLAN tag is not included in the control plane LDP advertisement B. When the encapsulation is ethernet-ccc, only frames without a VLAN tag are accepted in the data plane C. When the encapsulation is vLan-ccc or extended-vlan-ccc, the configured VLAN tag is included in the control plane LDP advertisement D. When the encapsulation is ethemet-ccc, tagged and untagged frames are both accepted in the data plane.
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C. When the encapsulation is vLan-ccc or extended-vlan-ccc, the configured VLAN tag is included in the control plane LDP advertisement D. When the encapsulation is ethemet-ccc, tagged and untagged frames are both accepted in the data plane.
Answer Description Explanation:
The customer interface in an LDP-signaled pseudowire is the interface on the PE router that connects to the CE device. An LDP-signaled pseudowire is a type of Layer 2 circuit that uses LDP to establish a point-to-point connection between two PE routers over an MPLS network. The customer interface can have different encapsulation types depending on the type of traffic that is carried over the pseudowire. The encapsulation types are ethernet-ccc, vlan-ccc, extended-vlan-ccc, atm-ccc, frame-relay-ccc, ppp-ccc, cisco-hdlc-ccc, and tcc-ccc. Depending on the encapsulation type, the customer interface can accept or reject tagged or untagged frames in the data plane, and include or exclude VLAN tags in the control plane LDP advertisement. The following table summarizes the behavior of different encapsulation types:
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