Juniper Networks Certified Design Specialist, Data Center (JNCDS DC)

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Juniper Networks Certified Design Specialist, Data Center (JNCDS DC)

Which encapsulation is used on the cascade ports of a Junos Fusion aggregation device?

PBB ✘ IEEE 802.1BR ✘ Broadcom HiGig2 ✘ MPLS ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

A customer has reached the limit of their IEEE Layer 2 VLAN implementation. The customer then switches to a VXLAN overlay architecture using Layer 3. In this scenario, how many unique VXLAN segments are mathematically available?

4194304 ✘ 8192 ✘ 4096 ✘ 16777216 ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

A customer is using a Clos IP fabric design in their data center. What is the advantage of using EBGP signaling between spine and leaf nodes rather than IBGP in this scenario?

An EBGP router automatically performs the next hop self-operation on advertised routes. ✘ By default, EBGP supports multihop sessions between peers. ✘ A leaf node can have multiple EBGP sessions with a spine node. ✘ EBGP does not require support for the ADD-PATH capability. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

A customer's data center is built with a QFX3000-G composed of four QFX3008-I Interconnects, four QFX5100-48S nodes in the network Node group, and 20 QFX5100-48S nodes spread in 10 redundant server Node groups. There are host systems (FCoE clients) scattered everywhere throughout the data center. In this scenario, where should the FCoE-to-FC gateway(s) be placed?

QFX3500s must be placed into the network Node group to provide a centralized FC-to-FCoE gateway. ✘ QFX3500s must be placed external to the QFX3000-G to provide an external FC-to-FCoE gateway. ✘ QFX3500s must be placed directly attached to the QFX3008-I Interconnects as a new Fibre Channel Node group to provide a centralized FC-to-FCoE gateway. ✘ Every Node which has FCoE client servers must become its own FC-to-FCoE gateway to provide a distributed FC-to-FCoE gateway. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

The QFX5100 can be configured to be a virtual tunnel endpoint (VTEP) in your Clos IP fabric. What is the importance of this capability?

It allows the QFX5100 to perform the PE role of an EVPN. ✘ It allows attached bare metal servers to communicate using an overlay VXLAN network. ✘ It prevents the QFX5100 from learning the MAC addresses of an overlay network. ✘ It allows the QFX5100 to perform the PE role of a Layer 2 pseudowire. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

A customer wants to implement redundancy in the core and at the edge with a single IP address for management in their data center. They have 200 servers dual- homed with two 10 Gbps fiber ports, and two 1 Gbps copper ports for management and testing. In addition, they have a redundant iSCSI array with two 40 Gbps ports each. In this scenario, which solution meets the customer's requirements?

a QFabric system using QFX3000-M with two QFX3600-Is, two QFX3008 Directors, along with eight EX4300-48Ts, and nine QFX5100-48Ss as node devices. ✘ a Virtual Chassis Fabric solution consisting of two QFX-5100-24Q as spine nodes and the leaf nodes consisting of eight EX4300-48Ts and nine QFX5100-48Ssoperating in mix mode VCF ✘ a dual core switch design with two EX9208s in an MC-LAG architecture with nine dual-homed QFX5100-48Ss and eight dual-homed EX4300-48Ts ✘ a Virtual Chassis solution consisting of one Virtual Chassis with nine QFX5100-48Ss and one Virtual Chassis with eight EX4300-48Ts ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

You are implementing a new financial application in your data center. You must ensure Web traffic to this server is secure. Which Junos feature would you use to accomplish this task?

graceful restart ✘ antispam ✘ AppSecure ✘ Virtual Chassis ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

A customer wants to build a new data center based on the QFX3000-M. The data center must support 30 high traffic volume host servers. Each server will be dual connected to the fabric with two 40 Gbps links. The customer requires that there be a 1:1 subscription ratio within the fabric. How should the QFX3000-M be configured to meet the customer's requirements?

Use four QFX5100-24Q Interconnect chassis to which each of 30 QFX35000 nodes will be dual connected with two 40 Gbps FTE links to each QFX5100-24Q. ✘ Use four QFX3600-I Interconnect chassis to which each of eight QFX3600 nodes will be dual connected with two 40 Gbps FTE links to each QFX3600-I. ✘ Use eight QFX3600-I Interconnect chassis to which each of 16 QFX3600 nodes will be connected with a 40 Gbps FTE link to each QFX3600-I. ✘ Use four QFX3008-I Interconnect chassis to which each of 16 QFX3600 nodes will be dual connected with two 40 Gbps FTE links to each QFX3600-I. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Clos architectures are based on which network topology?

ring ✘ VLANs ✘ hybrid ✘ spine and leaf ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

10.

You are designing your data center SRX Series devices to be highly available. You are required to have any failure on the active firewall trigger all services to be moved to the non-active firewall. What will accomplish this task?

Place both nodes in a Virtual Chassis. Place all interfaces in the SRX cluster in RG0 and use interface monitoring. Remove RG0 from the SRX cluster and place all interfaces in RG1 and use interface monitoring. Install redundant chassis cluster cards in each node and disable one.

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

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