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Designing Cisco Network Service Architectures

Question No: 81

What is the purpose of an OTV edge device?

1. connect to other data centers

2. connect to the access layer

3. connect to the end users

4. connect to mobile devices

Answer: A Explanation:

https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/DCI/whitepaper/D CI3_OTV_Intro/DCI_1.html

quot;Edge Device

The edge device (Figure 1-1) performs OTV functions: it receives the Layer 2 traffic for all VLANs that need to be extended to remote locations and dynamically encapsulates the Ethernet frames into IP packets that are then sent across the transport infrastructure.

[…]

Finally, the OTV edge device can be positioned in different parts of the data center. quot;

Question No: 82

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

1. Because the IP phone is a three-port switch, IP telephony extends the network edge, impacting the

   Distribution layer.

2. Video and voice are alike in being bursty and bandwidth intensive, and thus impose requirements to be lossless, and have minimized delay and jitter.

3. IP phones have no voice and data VLAN separation, so security policies must be based on upper layer traffic characteristics.

4. Though multi-VLAN access ports are set to dot1q and carry more than two VLANs they are not trunk ports.

Answer: A Explanation:

Well, it seems there are no good answers.

-gt; Multi-VLAN can carry exactly 2 Vlans, not more.

-gt; IP Phones have Vlan separation. The answer could be true if they were talking about SOFT phones.

-gt; Voice is not bandwidth intensive.

-gt; IP phones is a 3-port switch and it extends the network edge but it impacts the access layer, not the

distribution..

Question No: 83 DRAG DROP

Answer:

Question No: 84

Explain to a customer 2 advantages of the routing summarization.(Choose two)

1. small routing table

2. small upstream impact of a flapping interface

3. fast convergence

4. security

5. enhance view of the architecture

Answer: A,B

Question No: 85

Two Cisco switches with 1 SUP and many 10G line-card ports for each switch, run in VSS mode. In which case or for what reason you don#39;t connect all VSL to SUP?

1. The need for hardware diversity

2. Bandwidth congestion at SUP

3. In case the sup fail

4. Qos must be configured on both

Answer: A

Question No: 86

Which option is correct when using VSS to combine two physical switches into one logical switch? (Choose two)

1. Both data planes forward traffic simultaneously.

2. Only one data plane forwards traffic, while the other data plane is on standby.

3. Both control planes forward traffic simultaneously.

4. Control planes are combined into one virtual control plane.

Answer: A,D

Question No: 87

Which ISP technology can be implemented as a service when designing a topology to perform extranet

connectivity via multitenant segmentation from within a corporate intranet?

1. Cisco Easy VPN

2. GRE over IPsec

3. MPLS

4. VTI

5. VPNaaS

Answer: C

Question No: 88

DCI: simple extend layer 2 data center less than 4000 VLAN ? (Choose Two)

1. OTV

2. VXLAN

3. LISP

4. MPLS

5. L2TP

Answer: A,D Explanation:

MPLS using AToM or VPLS I guess..

VXLAN could do it but I think they would have not specified quot;lt;4000 vlansquot; if they wanted us to answer that.

In fact, we could even think of L2TPv3…

Even if it#39;s really dirty, it#39;s possible (https://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/l2tpv30s.html#wp1027175 quot;For L2TPv3, an Ethernet subinterface configured to support VLAN switching may be bound to an Xconnect service so that all Ethernet traffic, tagged with a VID specified on the

subinterface, is tunneled to another PE.quot;)

Question No: 89

Which two characteristics are most typical of a SAN? (Choose two.)

1. NICs are used for network connectivity.

2. Servers request specific blocks of data.

3. Storage devices are directly connected to servers.

4. A fabric is used as the hardware for connecting servers to storage devices.

5. The TCO is higher because of the cost of director class storage switches.

Answer: B,D

Question No: 90

What are two advantages of a L2 looped data center design model? (Choose two.)

1. promotes Layer 2 high availability

2. prevents VLAN propagation

3. allows sharing of service modules

4. eliminates the use of STP

5. improves data transfer speeds

Answer: A,C

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