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350-501 Real Exam Questions

Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR)

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Question 1 Multiple choice

A regional operation center deployed SQL servers that were synchronized with the company's backend storage servers by using a 768 Kbps link. Although network congestion is not a frequent issue, the VoIP service suffers a serious degradation.

Which two technologies can be implemented to improve the quality of the customer's VoIP traffic? (Choose two)

  1. A

    A decrease in the wan interface buffer size

  2. B

    LLQ for management traffic

  3. C

    cRTP

  4. D

    TCP/UDP filtering based on NBAR

  5. E

    TCP traffic prioritization

  6. F

    LFI

  7. G

    TCP starvation

Show answer and explanation

Correct answers: C, F

Question 2 Single choice

Which Cisco software OS uses monolithic architecture?

  1. A

    NX-OS

  2. B

    IOS XE

  3. C

    IOS XR

  4. D

    IOS

Show answer and explanation

Correct answer: D

Explanation

Cisco Internetwork Operating System (IOS) is the software used on most Cisco Systems routers and current Cisco network switches. IOS is a package of routing, switching, internetworking and telecommunications functions integrated into a multitasking operating system. IOS uses a monolithic architecture, meaning that all processes run in a single address space, making it a single-image system.

Question 3 Single choice

Refer to the exhibit.

A network engineer with an employee ID: 5086:72:817 is configuring a connection to manage CE1 from the OAM server on VLAN 100. PE1 must push S-VLAN tag 10 toward PE2 while forwarding traffic from CE1 to the OAM server. PE1 must push S-VLAN tag 20 toward PE2 while forwarding traffic from CE2 to the data traffic gateway.

Which configuration must the engineer implement on PE2?

  1. A

    interface GigE0/1
    encapsulation dot1q 100
    rewrite ingress tag pop 10
    rewrite ingress tag push 20

  2. B

    interface Ge0/0
    encapsulation dot1q 100
    rewrite ingress tag push dot1q 10 symmetric
    interface Ge0/1
    encapsulation dot1q 200
    rewrite ingress tag push dot1q 20 symmetric

  3. C

    interface GigE0/1
    encapsulation dot1q 10
    rewrite ingress tag push dot1q 10 symmetric
    Interface Ge0/0
    encapsulation dot1q 20
    rewrite ingress tag push dot1q 20 symmetric

  4. D

    Interface Ge0/1
    encapsulation dot1q 100

Show answer and explanation

Correct answer: C

Question 4 Multiple choice

A NOC engineer is troubleshooting an issue on a customer's server that is connected to a switch port in the data center. The engineer has a packet analyzer that is connected to a test port in the NOC.

A core network exists between the NOC and the data center Which two configuration steps should the NOC engineer apply for the port in the NOC and the customer's switch port in the data center? (Choose Two)

  1. A

    Configure ERSPAN between the NOC test port and customer's switch port

  2. B

    Enable an MPLS pseusdowire that is destined to the NOC and used by the mirrored customer traffic to cross network

  3. C

    Enable GRE encapsulation that is destined to the NOC and supply by the mirrored customer traffic to cross the network

  4. D

    Enable an MPLS TE tunnel that is destined to the NOC and used by the mirrored customer traffic to cross the core network

  5. E

    Configure RSPAN between the NOC test port and customer's switch port

Show answer and explanation

Correct answers: A, C

Question 5 Single choice

How does TI-LFA reduce packet loss in Segment routing?

  1. A

    It determines which link to use when load balancing to prevent packet fragmentation loss.

  2. B

    It establishes multiple labels per path using more than one IGP.

  3. C

    It calculates loop-free backup paths that are rapidly implemented in case of a link failure.

  4. D

    It enables path selection in SR-TE to support MPLS label allocation.

Show answer and explanation

Correct answer: C

Question 6 Single choice

While implementing TTL security, you issue the PE(config-router-af)#neighbor 2.2.2.2 ttl-security hops 2

command.

After you issue this command, which BGP packets does the PE accept?

  1. A

    to 2.2.2.2, with a TTL of 2 or more

  2. B

    from 2.2.2.2, with a TTL of less than 2

  3. C

    to 2.2.2.2, with a TTL of less than 253

  4. D

    from 2.2.2.2, with a TTL of 253 or more

Show answer and explanation

Correct answer: D

Explanation

References:
https://www.cisco.com/c/en/us/td/docs/ios/12_2sx/feature/guide/fsxebtsh.html#wp1059215

Question 7 Multiple choice

What are two features of stateful NAT64? (Choose two.)

  1. A

    It uses address overloading.

  2. B

    It provides 1:N translations, so it supports an unlimited number of endpoints.

  3. C

    It requires IPv4-translatable IPv6 address assignments.

  4. D

    It requires the IPv6 hosts to use either DHCPv6-based address assignments or manual address assignments.

  5. E

    It provides 1:1 translation, so it supports a limited number of endpoints.

Show answer and explanation

Correct answers: A, B

Explanation

References:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_nat/configuration/xe-16/nat-xe-16-book/iadnat-stateful-nat64.html

Question 8 Single choice

How does Inter-AS Option-A function when two PE routers in different autonomous systems are directly connected?

  1. A

    The two routers share all Inter-AS VPNv4 routes and redistribute routes within an IBGP session to provide end-to-end reach.

  2. B

    The two routers establish an MP-EBGP session to share their customers' respective VPNv4 routes.

  3. C

    The two routers treat one another as CE routers and advertise unlabeled IPv4 routes through an EBGP session.

  4. D

    The two routers share VPNv4 routes over a multihop EBGP session and set up an Inter-AS tunnel
    using one another's label.

Show answer and explanation

Correct answer: C

Question 9 Multiple choice

Which two features will be used when defining SR-TE explicit path hops if the devices are using IP unnumbered interfaces? (Choose two.)

  1. A

    router ID

  2. B

    labels

  3. C

    node address

  4. D

    next hop address

  5. E

    output interface

Show answer and explanation

Correct answers: B, C

Question 10 Single choice

Refer to the exhibit. An engineer started to configure a router for BGP. Which configuration must the network engineer apply to router CE1.NYC1 so that it establishes an eBGP multihop session with PE1.
NYC1?

  1. A

    Option A

  2. B

    Option B

  3. C

    Option C

  4. D

    Option D

Show answer and explanation

Correct answer: A