Passtcert Cisco 640-875 SPNGN1 questions and answers pdf

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Share some CCNA SP 640-875 exam questions and answers below.
Which two statements about transparent bridging operations are true? (Choose two.) 
A. A bridge builds its MAC address table dynamically using the spanning-tree protocol. 
B. A bridge operates at the data link layer. 
C. A bridge sends unknown unicast frames out on all ports except the incoming port. 
D. A bridge forwards traffic based on the destination IP address. 
E. All the ports on the bridge belong to the same collision domain. 
Answer: B,C

Which two statements about classful or classless routing protocol operations are true? (Choose two.) 
A. Classful routing protocols do not send subnet mask information with their routing updates. 
B. Variable-length subnet masks are supported when using classful routing protocols. 
C. Examples of classless routing protocols include RIPv1, EIGRP, OSPF, and IS-IS. 
D. Classful routing protocols do not support discontiguous subnets. 
Answer: A,D

What is the default spanning-tree mode of an NNI port on a Cisco ME3400 switch? 
A. multiple spanning tree (mst) 
B. per-vlan rapid spanning tree (rapid-pvst) 
C. per-vlan spanning tree (pvst) 
D. IEEE 802.1D (stp) 
Answer: B

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