300-420 Practice Test

A customer with an IPv4 only network topology wants to enable IPv6 connectivity while
preserving the IPv4 topology services. The customer plans to migrate IPv4 services to the
IPv6 topology, then decommission the IPv4 topology. Which topology supports these
requirements?

A.

dual stack

B.

6VPE

C.

6to4

D.

NAT64

A customer's current Layer 2 infrastructure is running Spanning Tree 802.1d, and all
configuration changes are manually implemented on each switch. An architect must
redesign the Layer 2 domain to achieve these goals:
reduce the impact of topology changes
reduce the time spent on network administration
reduce manual configuration errors
Which two solutions should the architect include in the new design? (Choose two.)

A.

Implement Rapid PVST+ instead of STP.

B.

Implement MST instead of STP.

C.

Use VTP to propagate VLAN information and to prune unused VLANs.

D.

Configure broadcast and multicast storm control on all switches.

E.

Configure dynamic trunking protocol to propagate VLAN information.

Which design consideration must be made when using IPv6 overlay tunnels?

A.

Overlay tunnels that connect isolated IPv6 networks can be considered a final IPv6 network architecture.

B.

Overlay tunnels should only be considered as a transition technique toward a
permanent solution.

C.

Overlay tunnels can be configured only between border devices and require only the IPv6 protocol stack.

D.

Overlay tunneling encapsulates IPv4 packets in IPv6 packets for delivery across an IPv6 infrastructure.

An engineer must design an in-band management solution for a customer with branch sites. The solution must allow remote management of the branch sites using management protocols over an MPLS WAN. Queueing is implemented at the remote sites using these classes:
How must the solution prioritize the management traffic over the WAN?

A.

Mark the traffic with DSCP CS1 and map into Class2 with a minimum bandwidth
assigned by reducing the bandwidth available to CIass3.

B.

Mark the traffic with DSCP CS6 and map into Class1 with a minimum bandwidth
assigned by reducing the bandwidth available to Class2

C.

Mark the traffic with DSCP EF and map into Class1 with a minimum bandwidth assigned
by reducing the bandwidth available to Class2.

D.

Mark the traffic with DSCP CS2 and map into Class2 with a minimum bandwidth
assigned by reducing the bandwidth available to Class3

What is the function of the multicast Reverse Path Forwarding check?

A.

It allows for a loop-free distribution tree from the source to receivers.

B.

It serves as an Auto RP Mapping agent.

C.

It prevents bootstrap messages from reaching all routers.

D.

It is used to discover and announce RP-set information.