Cisco Designing Cisco Network Service Architectures v3.0

1.

Which statement about vPC technology is true?

It allows a device to connect to two separate upstream devices as if they were a single device It provides the ability to pair two servers in the data center It promotes better STP designs in the switching infrastructure It supports IEEE 802.1Q

2.

A campus network in a switch block design requires redundant distribution switches, load sharing across uplinks, a loop-free topology, and only one gateway IP address per VLAN. Which switching technology meets all of the requirements?

HSRP VSS Spanning Tree Protocol EtherChannel

3.

A campus network utilizes EIGRP to connect to several remote branch offices. Which configuration should be established on all branch routers to improve routing scalability and performance?

Configure authentication between the campus and branch offices Enable stub routing on all branch routers Adjust EIGRP k-values to utilize delay Utilize offset lists to direct traffic more efficiently

4.

Which protocol does VPLS use to tunnel layer 2 ethernet frames?

MPLS L2TPv3 L2TPv1 VXLAN

5.

A network engineer is designing an address plan based on network applications. Which application presents the greatest need for its own address block?

IP telephony management multicast physical security

6.

Addressing QoS design in the Enterprise Campus network for IP Telephony applications means what?

It is critical to identify aggregation and rate transition points in the network, where preferred traffic and congestion QoS policies should be enforced Suspect traffic should be dropped closest to the source, to minimize wasting network resources An Edge traffic classification scheme should be mapped to the downstream queue configuration Applications and Traffic flows should be classified, marked and policed within the Enterprise Edge of the Enterprise Campus network

7.

Which of these statements is correct regarding Stateful Switchover and Cisco Nonstop Forwarding?

Utilizing Cisco NSF in Layer 2 environments can reduce outages to one to three seconds Utilizing SSO in Layer 3 environments can reduce outages to one to three seconds Distribution switches are single points of failure causing outages for the end devices Utilizing Cisco NSF and SSO in a Layer 2 environment can reduce outages to less than one second NSF and SSO with redundant supervisors have the most impact on outages at the access layer.

8.

What QoS technology allows traffic to pass even though it has exceeded the bandwidth limit but will be queued later?

Shaping Policing Weighted Fair Queuing Low Latency Queuing

9.

Which of the following facts must be considered when designing for IP telephony within an Enterprise Campus network?

Because the IP phone is a three-port switch, IP telephony extends the network edge, impacting the Distribution layer. Video and voice are alike in being bursty and bandwidth intensive, and thus impose requirements to be lossless, and have minimized delay and jitter IP phones have no voice and data VLAN separation, so security policies must be based on upper layer traffic characteristics. Though multi-VLAN access ports are set to dot1q and carry more than two VLANs they are not trunk ports.

10.

A company uses site-to-site IPsec VPN tunnels established over the public internet as a backup to its private WAN. The interoffice IP telephony service quality is degraded when a failover event occurs. What known design limitation can cause this issue?

maximum headend router throughput circuit bandwidth transport reliability number of remote sites

Cisco Designing Cisco Network Service Architectures v3.0

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