What two features in Cisco switches help prevent Layer 2 loops? (Choose two.)

Spanning Tree Protocol calculates path cost based on which of these?

Which standard supports multiple instances of spanning tree?

Which of these best identifies the types of prefixes a router running BGP will advertise to an EBGP peer?

Which three of these statements about penultimate hop popping are true? (Choose three.)

Which types of prefixes will a router running BGP most likely advertise to an IBGP peer, assuming it is not configured as a route reflector?

All of these are fundamental building blocks of a differentiated services Traffic Conditioner Block except which one?

You are the network administrator of an enterprise with a main site and multiple remote sites. Your network carries both VOIP and data traffic. You agree with your service provider to classify VOIP and data traffic according to the different service RFCs. How can your data and VOIP traffic be marked?

An expanding company is deploying leased lines between its main site and two remote sites. The bandwidth of the leased lines is 128kb/s each, terminated on different serial interfaces on the main router. These links are used for combined VOIP and data traffic. The network administrator has implemented a VOIP solution to reduce costs, and has therefore reserved sufficient bandwidth in a low latency queue on each interface for the VOIP traffic. Users now complain about bad voice quality although no drops are observed in the low latency queue.
What action will likely fix this problem?

Which of these is a valid differentiated services PHB?