1.Host D sends a frame to Host B at the same time that Host B sends a frame to Host D. Bridging is enabled on Router 1, and the two frames collide into each other. Select the best explanation of why Host B will or will not receive the original frame from Host D:

　　A: Host B will receive the frame, since Hosts B & D are in the same VLAN.

　　B: Host B will receive the frame, since Hosts B and D are in the same routing domain.

　　C: Host B will not receive the frame, since Hosts B and D are in the same collision domain.

　　D: Host B will not receive the frame, since Hosts B and D are in different broadcast domains.

　　E: Host B will receive the frame, since Hosts B and D are in the same bridging domain.

　　Correct Answers: C

　　2.What are the 4 bridge port states in a transparent bridging environment?

　　A: Spanning, learning, blocking, forwarding

　　B: Connecting, learning, spanning, forwarding

　　C: Listening, learning, blocking, forwarding

　　D: Broadcasting, listening, forwarding, blocking

　　E: Learning, forwarding, connecting, blocking

　　Correct Answers:　C

　　3.What statement about clocking is true?

　　A: Routers on either end of a T1 must have a clock source, but they do not have to be synchronized with each other.