350-501 practice questions 221–230

1. Question 221 · 377 in bank

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

   • AIPoDWDM
   • BCWDM
   • CDWDM
   • DROADM

   Show answer

   Answer: D

   Explanation

   C is correct The technology that enables the addition of new wavelengths in a fiber-optic network is called Dense Wavelength Division Multiplexing (DWDM). DWDM allows multiple optical signals, each operating at a different wavelength, to be combined and transmitted over a single optical fiber. Reconfigurable Optical Add-Drop Multiplexer (ROADM) is indeed a technology used in conjunction with Dense Wavelength Division Multiplexing (DWDM) to manage and optimize wavelengths in a fiber-optic network. A ROADM allows for the flexible addition and dropping of specific wavelengths at different points in the network without disturbing the rest of the traffic. So, while DWDM is the primary technology for adding new wavelengths, a ROADM is a key component that provides flexibility in routing and managing those wavelengths

   Source: Adapted from community discussion — Allani

   References

   • Cisco documentation

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2. Question 222 · 377 in bank

   

   Refer to the exhibit. While troubleshooting the network, a network operator with an employee id: 1234:55:678 is trying to ping XR1. Which result should the operator expect when trying to ping to an XR1 local address?

   • AAII ICMP traffic is dropped
   • BAII ICMP traffic responds successfully
   • CICMP traffic works at a policed rate of 19 bytes per second every 100 ms
   • DICMP traffic works at a policed rate of 19 packets every 100 ms

   Show answer

   Answer: A

   Explanation

   Answer should be A, "Ar" is Average rate limit and it's being set 0pps, so all icmp packet destined to the router will be dropped. I verified with my lab XRv9000 with setting. RP/0/RP0/CPU0:PE1#sh running-config lpts Fri Jun 11 23:53:01.911 UTC lpts pifib hardware police flow icmp local rate 0 ! RP/0/RP0/CPU0:PE1# RP/0/RP0/CPU0:PE1#show lpts pifib hardware entry location 0/0/Cpu0 | begin ICMP Fri Jun 11 23:53:41.135 UTC L4 Protocol : ICMP VRF ID : any Destination IP : any Source IP/BFD Disc: any Port/Type : Port:8 Source Port : any Is Fragment : 0 Is SYN : any Is Bundle : na Is Virtual : na Interface : any Slice : 0 V/L/T/F : 0/IPv4_STACK/0/ICMP-local DestNode : Local DestAddr : Punt Accepted/Dropped : 5/10 Po/Ar/Bu : 12/0pps/750ms State : pl_pifib_state_complete

   Source: Adapted from community discussion — Golden_Yen

   References

   • Cisco documentation
   • Cisco documentation
   • Cisco documentation

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3. Question 223 · 377 in bank

   

   Refer to the exhibit. A network engineer must configure an LDP neighborship between two newly installed routers that are located in two different offices. Router 1 is the core router in the network and it has already established OSPF adjacency with router 2. On router 1 and router 2. interface fa0/0 is configured for BFD. Which additional configuration must the engineer apply to the two devices to meet the requirement?

   • ARouter1(config)#int fa0/0 - Router1(config-if)#mpls ldp autoconfig Router2(config)#router ospf 1 - Router2(config-router)#mpls ip
   • BRouter1(config)#int fa0/0 - Router1(config-if)#mpls ip - Router1(config-if)#mpls ldp discovery transport-address interface Router2(config)#int fa0/0 - Router2(config-if)#mpls ip - Router2(config-if)#mpls ldp discovery transport-address interface
   • CRoute1(config)#int fa0/0 - Router1(config-if)#mpls ldp autoconfig Router1(config-if)#mpls ldp discovery interface Router2(config)#router ospf 1 - Router2(config-router)#mpls ldp autoconfig Router2(config-if)#mpls ldp discovery interface
   • DRouter1(config)#int fa0/0 - Router1(config-if)#mpls ip - Router2(config)#router ospf 1 - Router2(config-router)#mpls ldp autoconfig

   Show answer

   Answer: D

   Explanation

   I think that is B, I just want to make a quick note that on older IOS versions you will need to run the mpls ip command globally, this configures hop-by-hop globally but does not enable MPLS on the interface. In newer IOS versions it is enabled by default. you can configure LDP to use a physical interface as the transport address. Remember this is not the same as the router ID. This is the address used to create the TCP session. mpls ldp discovery transport-address interface

   Source: Adapted from community discussion — kelso1603

   References

   • Cisco documentation

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4. Question 224 · 377 in bank

   SIMULATION -

   

   Guidelines - This is a lab item in which tasks will be performed on virtual devices. • Refer to the Tasks tab to view the tasks for this lab item. • Refer to the Topology tab to access the device console(s) and perform the tasks. • Console access is available for all required devices by clicking the device icon or using the tab(s) above the console window. • All necessary preconfigurations have been applied. • Do not change the enable password or hostname for any device. • Save your configurations to NVRAM before moving to the next item. • Click Next at the bottom of the screen to submit this lab and move to the next question. • When Next is clicked, the lab closes and cannot be reopened. Topology -

   

   Tasks - Configure the BGP routing protocol for R1 and R2 according to the topology to achieve these goals: 1. Configure EBGP neighbor adjacency for the IPv4 and IPv6 address family between R1 and R2 using Loopback0 IPv4 and IPv6 addresses. All BGP updates must come from the Loopback0 interface as the source. Do not use IGP routing protocols to complete this task. 2. Configure MD5 Authentication for the EBGP adjacency between R1 and R2. The password is clear text C1sc0!.

   This is an interactive task on the real exam — a drag-and-drop, hotspot or ordering question. There is nothing to select here, so the answer is shown below for reference.

   Show the answer figure

   Answer: See figure below

   Explanation

   -Don't forget "ipv6 unicast-routing" to enable ipv6 routing. - other labo For IS-IS, 3 routers enabling ipv4 and ipv6, area and domain password, R1 only support level2 and the other two enable lavel-2 to R1 and Level-1 between them. - (not lab question) a hint for another question to match on icmp traffic look for ip protocol 1.

   Source: Adapted from community discussion — Mo_El

   References

   • Cisco documentation

   

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5. Question 225 · 377 in bank

   What is a characteristic of the YANG model?

   • AAssociate types are optional for each leaf.
   • BIt uses containers to categorize related nodes.
   • CIt is a distributed model of nodes.
   • DSpines are used to represent individual attributes of nodes.

   Show answer

   Answer: B

   References

   • cisco.com documentation

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6. Question 226 · 377 in bank

   

   Refer to the exhibit. The network engineer is performing end-to-end MPLS path testing with these conditions: • Users must perform MPLS OAM for all available same-cost paths from R1 to R4. • Traceroute operations must return all of the next-hop IP details. Which configuration meets these requirements?

   • Atraceroute mpls ipv4 10.10.10.4 255.255.255.255 verbose
   • Btraceroute mpls multipath ipv4 10.10.10.4 255.255.255.255
   • Ctraceroute mpls multipath ipv4 10.10.10.4 255.255.255.255 verbose
   • Dtraceroute mpls ipv4 10.10.10.4 255.255.255.255 source 10.10.10.1

   Show answer

   Answer: C

   References

   • Cisco documentation

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7. Question 227 · 377 in bank

   

   Refer to the exhibit. A network engineer must implement SNMPv3 on a Cisco IOS XR router running BGP. The engineer configures SNMPv3 to use SHA for authentication and AES for privacy on the routers, which are in a different data center in the same exchange as other routers. The engineer must also verify the associated MIB view family name, storage type, and status. Which set of actions meets these requirements?

   • AAdd configuration snmp-server user UserJustMe GrpMonitoring v3 auth sha AuthPass1 priv 3des 128 PrivPass2 and use show snmp interface to verify the configuration.
   • BAdd configuration snmp-server user AuthUser group2 remote 10.1.1.1 v3 auth sha and use show snmp mib to verify the configuration.
   • CAdd configuration snmp-server user AuthUser group2 remote 10.1.1.1 v3 auth sha and use show snmp engineid to verify the configuration.
   • DAdd configuration snmp-server user UserJustMe GrpMonitoring v3 auth sha AuthPass1 priv aes 128 PrivPass2 and use show snmp view to verify the configuration.

   Show answer

   Answer: D

   Explanation

   D is correct show snmp view To display the configured views and the associated MIB view family name, storage type, and status, use the show snmp view command in EXEC mode.

   Source: Adapted from community discussion — thejag

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8. Question 228 · 377 in bank

   SIMULATION -

   

   Guidelines - This is a lab item in which tasks will be performed on virtual devices. • Refer to the Tasks tab to view the tasks for this lab item. • Refer to the Topology tab to access the device console(s) and perform the tasks. • Console access is available for all required devices by clicking the device icon or using the tab(s) above the console window. • All necessary preconfigurations have been applied. • Do not change the enable password or hostname for any device. • Save your configurations to NVRAM before moving to the next item. • Click Next at the bottom of the screen to submit this lab and move to the next question. • 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!.

   This is an interactive task on the real exam — a drag-and-drop, hotspot or ordering question. There is nothing to select here, so the answer is shown below for reference.

   Show the answer figure

   Answer: See figure below

   Explanation

   The loopback interfaces need to be in OSPF and will be /32 but it asks "OSPF must not generate the host entries /32 for the ADJACENT interfaces" which is the E0/0. If the network is point-to-multipoint it generates a /32 so changing to point-to-point will resolve that. https://community.cisco.com/t5/routing/the-32-entry-in-rib-when-running-ospf-on-point-to-multipoint/td-p/4301264

   Source: Adapted from community discussion — thejag

   References

   • cisco.com documentation
   • cisco.com documentation

   

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9. Question 229 · 377 in bank

   

   Refer to the exhibit. Which show command should be implemented to display per-interface statistics about uRPF drops and suppressed drops?

   • Ashow cef interface
   • Bshow ip traffic
   • Cshow ip interface
   • Dshow ip interface brief

   Show answer

   Answer: C

   Explanation

   Before configuring R2(config-if)#do sh ip int g1 | sec verify After configuring R2(config-if)#int g1 R2(config-if)#ip verify unicast reverse-path R2(config-if)#do sh ip int g1 | sec verify IP verify source reachable-via RX, allow default 0 verification drops 0 suppressed verification drops 0 verification drop-rate

   Source: Adapted from community discussion — NetworkYoda72

   References

   • Cisco documentation

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10. Question 230 · 377 in bank

    

    Refer to the exhibit. An engineer at a new ISP must configure many Cisco devices in the data center. To make the process more efficient, the engineer decides to automate the task with a REST API. Which action does this JSON script automate?

    • AConfigure the IP address for the existing loopback interface.
    • BConfigure a physical interface on the router with an IP address and then create a loopback interface.
    • CConfigure a physical interface on the router with an IP address.
    • DDelete the existing loopback Interface and replace it with a new loopback interface.

    Show answer

    Answer: A

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350-501 practice, question 221. 377 questions available.