Cisco 350-501 Online Practice Questions and Exam Preparation

Cisco 350-501 Online Questions & Answers

• Question 331:

  Which technology enables the addition of new wavelengths in a fiber-optic network?

  A. IPoDWDM
  B. CWDM
  C. DWDM
  D. ROADM
  C. DWDM

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  Explanation

  Wavelength-division multiplexing (WDM) is a technology which multiplexes a number of optical carrier signals onto a single fiber [1], using different wavelengths of light to carry different signals. This allows for a greater capacity for data transfer and enables the addition of new wavelengths in a fiber-optic network

• Question 332:

  Refer to the exhibit.

  

  OSPF: Send DBD to 192.168.1.2 on GigabitEthernet0/0 seq 0x728 opt 0x52 (flag 0x7) len 44 OSPF: Build DD packet to X.X.X.X DBD Seq#: 0x728 Options: 0x52 Type: 2 ID: 10.1.1.1 Adv: 10.1.1.2

  Interface MTU: 1500 Options: 0x0 (no checksum requested) DD packet size 44 bytes.

  GigabitEthernet0/0: Dropping DBD: Mismatch in option bits GigabitEthernet0/0: Neighbor 192.168.1.2 in non-Exstart or non-Exchange state: I Exchange Done

  A network engineer just upgraded the Cisco IOS XE Software to the newest version on OSPF routers R1 and R2, added the point-to-point network type under Gi0/0 on R2, and configured ip route 192.168.10.0 255.255.255.0 192.168.1.2 on R1. After the engineer restarted the routers, R1 entered the Exstart state with its neighbor, but the adjacency has not been established.

  Which action must the engineer take to resolve the issue?

  A. Set the network type of the R2 OSPF interface to broadcast.
  B. Add a static route toward 192.168.20.0 on R2.
  C. Change the R2 OSPF router ID to 10.1.1.1.
  D. Decrease the OSPF cost of the network on R2 to 10.
  A. Set the network type of the R2 OSPF interface to broadcast.

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  Explanation

• Question 333:

  Refer to the exhibit

  

  BGPsec is implemented on R1, R2, R3, and R4. BGP peering is established between neighboring autonomous systems.

  Which statement about implementation is true?

  A. BGP updates from the iBGP peers are appended with a community of local-as.
  B. BGP updates from the all BGP peers are appended with a community of no-export.
  C. BGP updates from the eBGP peers are appended with an additional AS path value that is statically set by the domain administrator.
  D. BGP updates from the eBGP peers are appended with a BGPsec attribute sequence that includes a public key hash and digital signature.
  D. BGP updates from the eBGP peers are appended with a BGPsec attribute sequence that includes a public key hash and digital signature.

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  Explanation

  BGPsec enhances BGP by adding a layer of security for the AS path attribute. When BGPsec is implemented, updates from eBGP peers include a BGPsec attribute sequence with a public key hash and digital signature. This ensures the authenticity and integrity of the AS path, preventing unauthorized AS numbers from being inserted. References: Implementing and Operating Cisco Service Provider Network Core Technologies course materials.

• Question 334:

  Refer to the exhibit:

  

  A network engineer is implementing QoS services. Which two statements about the QoS- group keyword on Cisco IOS XR 3re true? (Choose two )

  A. The QoS group numbering corresponds to priority level
  B. QoS group marking occurs on the ingress
  C. It marks packets for end to end QoS pokey enforcement across the network
  D. QoS group can be used in fabric QoS policy as a match criteria
  E. It cannot be used with priority traffic class
  B. QoS group marking occurs on the ingress
  D. QoS group can be used in fabric QoS policy as a match criteria

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  Explanation

  Fabric QoS policy class maps are restricted to matching a subset of these classification options:

  1. precedence 2. dscp 3. qos-group 4. discard-class 5. mpls experimental topmost

  https://www.cisco.com/c/en/us/td/docs/routers/ncs6000/software/ncs6k_r6-1/qos/configuration/guide/b-qos-cg-ncs6k-61x/b-qos-cg-ncs6k-61x_chapter_0110.html

• Question 335:

  Which protocol is used for communication between the PCE and PCC?

  A. POP
  B. CEF
  C. PCEP
  D. ICMP
  C. PCEP

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  Explanation

  The PCE (Path Computation Element) communicates with the PCC (Path Computation Client) using the PCEP. PCEP is responsible for path computation and signaling in MPLS networks.

  Implementing and Operating Cisco Service Provider Network Core Technologies course materials.

• Question 336:

  A network engineer must implement an ACL-based solution to mitigate availability issues on a web service that is hosted on a server at IP address 172.16.15.18/23. Access to the web server should be allowed over HTTP from RFC 1918 addresses only. The network architect has already enabled PMTUD in the network.

  Which ACL configuration must the engineer implement to complete the task?

  A. access-list 199 deny ip any host 172.16.15.18 tcp-fragmentsaccess-list 199 permit tcp 10.0.0.0 255.255.255.255 172.16.15.18 0.254.0.255 eq 80access-list 199 permit tcp 172.16.0.0 0.0.255.255 172.16.15.18 0.0.254.255 eq 80access-list 199 permit tcp 192.168.0.0 0.0.0.255 172.16.15.18 0.0.254.255 eq 80access-list 199 deny ip any any
  B. access-list 199 deny tcp any host 172.16.15.18 http-fragmentsaccess-list 199 permit 16 10.10.0.0 0.255.255.255 172.16.15.18 0.0.2.253 eq 80access-list 199 permit 16 172.16.0.0 0.0.255.255 172.16.15.18 0.0.2.253 eq 80access-list 199 permit 16 192.168.0.0 0.0.0.255 172.16.15.18 0.0.2.253 eq 80access-list 199 deny tcp any any
  C. access-list 198 deny ip any host 172.16.15.18 ip-fragmentsaccess-list 198 permit 18 10.10.0.0 255.255.255.0 172.16.15.18 255.255.254.0access-list 198 permit 18 172.16.0.0 255.255.0.0 172.16.15.18 255.255.254.0access-list 198 permit 18 192.168.0.0 255.255.255.0 172.16.15.18 255.255.254.0access-list 198 deny tcp any any
  D. access-list 198 deny ip any host 172.16.15.18 fragmentsaccess-list 198 permit 6 10.0.0.0 0.255.255.255 172.16.15.18 0.0.1.255 eq 80access-list 198 permit 6 172.16.0.0 0.0.255.255 172.16.15.18 0.0.1.255 eq 80access-list 198 permit 6 192.168.0.0 0.0.0.255 172.16.15.18 0.0.1.255 eq 80access-list 198 deny ip any any
  D. access-list 198 deny ip any host 172.16.15.18 fragmentsaccess-list 198 permit 6 10.0.0.0 0.255.255.255 172.16.15.18 0.0.1.255 eq 80access-list 198 permit 6 172.16.0.0 0.0.255.255 172.16.15.18 0.0.1.255 eq 80access-list 198 permit 6 192.168.0.0 0.0.0.255 172.16.15.18 0.0.1.255 eq 80access-list 198 deny ip any any

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  Explanation

• Question 337:

  Which QoS model allows hosts to report their QoS needs to the network?

  A. IntServ
  B. CB-WFQ
  C. DiffServ
  D. MQC
  A. IntServ

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  Explanation

  IntServ follows the signaled-QoS model, where the end-hosts signal their QoS needs to the network.

  https://www.cisco.com/en/US/technologies/tk543/tk766/technologies_white_paper09186a00800a3e2f.html

• Question 338:

  Refer to the exhibit.

  

  R2#

  router bgp 65101 no synchronization bgp log-neighbor-changes neighbor 10.0.0.6 remote-as 65201 neighbor 10.0.0.6 update-source Loopback0 neighbor 10.10.10.1 remote-as 65101 neighbor 10.10.10.1 update-source Loopback0 neighbor 10.10.10.1 next-hop-self !

  R3#

  router bgp 65201 no synchronization bgp log-neighbor-changes neighbor 10.0.0.5 remote-as 65101 neighbor 10.0.0.5 update-source Loopback0 neighbor 10.10.10.4 remote-as 65201 neighbor 10.10.10.4 update-source Loopback0 neighbor 10.10.10.4 next-hop-self !

  A network operations team is implementing eBGP on the service provider network. Data traffic between routers R1 and R4 must use the R2-R3 link, which connects AS 65101 and AS65201. iBGP sessions with adjacent routers are up on 10.10.10.1 and 10.10.10.4. The team is now updating the configuration for eBGP peers on routers R2 and R3.

  Which action must be taken to meet the requirements?

  A. Add the soft-reconfiguration command.
  B. Add the ebgp-multihop command.
  C. Remove the update-source command.
  D. Remove the next-hop-self command.
  B. Add the ebgp-multihop command.

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  Explanation

• Question 339:

  A new PE router is configured to run OSPF as an IGP with LDP on all interfaces. The engineer is trying to prevent black holes after convergence when the PERSON device loses an LDP session with other PE routers. Which action must the engineer take to implement LDP session protection on a new PE router?

  A. Configure the mpls ldp session protection and mpls label protocol ldp commands on the interfaces on the new PE router that connect to the CENTER routers.
  B. Configure the mpls ldp discovery targeted-hello accept and mpls ldp session protection commands on the interfaces on the new PE router that connect to the CE routers.
  C. Configure the new PE router with the mpls ldp session protection command and on neighboring routers that connect to this new PE router.
  D. Configure the new PE router with the mpls ldp session protection command on interfaces with directly connected neighbors.
  C. Configure the new PE router with the mpls ldp session protection command and on neighboring routers that connect to this new PE router.

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  Explanation

• Question 340:

  SIMULATION

  

  Guidelines

  This is a lab item in which tasks will be performed on virtual devices.

  1. Refer to the Tasks tab to view the tasks for this lab item.

  2. Refer to the Topology tab to access the device console(s) and perform the tasks.

  3. Console access is available for all required devices by clicking the device icon or using the tab(s) above the console window.

  4. All necessary preconfigurations have been applied.

  5. Do not change the enable password or hostname for any device.

  6. Save your configurations to NVRAM before moving to the next item.

  7. Click Next at the bottom of the screen to submit this lab and move to the next question.

  8. When Next is clicked, the lab closes and cannot be reopened.

  Topology

  

  Tasks

  Configure and verify the OSPF neighbor adjacency between R1 and R2 in OSPF area 0 according to the topology to achieve these goals:

  1. Establish R1 and R2 OSPF adjacency. All interfaces must be advertised in OSPF by using the OSPF interface command method. Use Loopback0 as the OSPF ID.

  2. There must be no DR/BDR elections in OSPF Area 0 when establishing the neighbor relationship between R1 and R2. OSPF must not generate the host entries /32 for the adjacent interfaces.

  3. Enable OSPF MD5 Authentication between both routers at the interface level with password C1sc0!.

  A. See explanation below.
  B. PlaceHolder
  C. PlaceHolder
  D. PlaceHolder
  A. See explanation below.

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  Explanation

  R1:

  Conf t

  Router ospf 10

  Router-id 10.1.1.1

  interface e0/0 ip ospf 10 area 0 ip ospf network point-to-point ip ospf message-digest-key 1 md5 C1sc0!.

  int lo0 ip ospf 10 area 0

  R2:

  Conf t

  Router ospf 10

  Router-id 10.2.2.2

  interface e0/0 ip ospf 10 area 0 ip ospf network point-to-point ip ospf message-digest-key 1 md5 C1sc0!.

  int lo0 ip ospf 10 area 0