350-401 practice questions 111–120

1. Question 111 · 1003 in bank

   Refer to the exhibit.

   

   An engineer reconfigures the port-channel between SW1 and SW2 from an access port to a trunk and immediately notices this error in SW1's log: *Mar 1 09:47:22.245: %PM-4-ERR_DISABLE: bpduguard error detected on Gi0/0, putting Gi0/0 in err-disable state Which command set resolves this error?

   • ASW1(config-if)#interface Gi0/0 SW1(config-if)#no spanning-tree bpdufilter SW1(config-if)#shut SW1(config-if)#no shut
   • BSW1(config-if)#interface Gi0/0 SW1(config-if)#no spanning-tree bpduguard enable SW1(config-if)#shut SW1(config-if)#no shut
   • CSW1(config-if)#interface Gi0/0 SW1(config-if)#spanning-tree bpduguard enable SW1(config-if)#shut SW1(config-if)#no shut
   • DSW1(config-if)#interface Gi0/1 SW1(config-if)#spanning-tree bpduguard enable SW1(config-if)#shut SW1(config-if)#no shut

   Show answer

   Answer: B

   Explanation

   A. SW1(config-if)#interface Gi0/0 SW1(config-if)#no spanning-tree bpdufilter SW1(config-if)#shut SW1(config-if)#no shut B. SW1(config-if)#interface Gi0/0 SW1(config-if)#no spanning-tree bpduguard enable SW1(config-if)#shut SW1(config-if)#no shut C. SW1(config-if)#interface Gi0/0 SW1(config-if)#spanning-tree bpduguard enable SW1(config-if)#shut SW1(config-if)#no shut D. SW1(config-if)#interface Gi0/1 SW1(config-if)#spanning-tree bpduguard enable SW1(config-if)#shut SW1(config-if)#no shut The correct answer is: B

   Source: Adapted from community discussion — xziomal9

   References

   • Cisco documentation

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2. Question 112 · 1003 in bank

   When a wireless client roams between two different wireless controllers, a network connectivity outage is experienced for a period of time. Which configuration issue would cause this problem?

   • ANot all of the controllers in the mobility group are using the same mobility group name.
   • BNot all of the controllers within the mobility group are using the same virtual interface IP address.
   • CAll of the controllers within the mobility group are using the same virtual interface IP address.
   • DAll of the controllers in the mobility group are using the same mobility group name.

   Show answer

   Answer: B

   Explanation

   B is the correct answer. If all the controllers within a mobility group are not using the same virtual interface, inter-controller roaming may appear to work, but the handoff does not complete, and the client loses connectivity for a period of time.

   Source: Adapted from community discussion — aki290

   References

   • Cisco documentation
   • Cisco documentation
   • Cisco documentation
   • Cisco documentation

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3. Question 113 · 1003 in bank

   What is the role of the RP in PIM sparse mode?

   • AThe RP maintains default aging timeouts for all multicast streams requested by the receivers.
   • BThe RP acts as a control-plane node only and does not receive or forward multicast packets.
   • CThe RP is the multicast router that is the root of the PIM-SM shared multicast distribution tree.
   • DThe RP responds to the PIM join messages with the source of a requested multicast group.

   Show answer

   Answer: C

   Explanation

   Exam guide: "In essence, two trees are created: an SPT from the FHR to the RP (S,G) and a shared tree from the RP to the LHR (*,G)". The RP is the root of the shared tree in PIM sparse mode, C is correct.

   Source: Adapted from community discussion — TheNetworkStudent

   References

   • Cisco documentation
   • juniper.net documentation
   • Cisco documentation

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4. Question 114 · 1003 in bank

   Why is an AP joining a different WLC than the one specified through option 43?

   • AThe AP is joining a primed WLC
   • BThe APs broadcast traffic is unable to reach the WLC through Layer 2
   • CThe AP multicast traffic is unable to reach the WLC through Layer 3
   • DThe WLC is running a different software version

   Show answer

   Answer: A

   Explanation

   I think it's A - Primed WLC Locally stored controller IPv4 or IPv6 address discovery—If the access point was previously associated to a controller, the IPv4 or IPv6 addresses of the primary, secondary, and tertiary controllers are stored in the access point’s nonvolatile memory. This process of storing controller IPv4 or IPv6 addresses on an access point for later deployment is called priming the access point. https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-6/config-guide/b_cg86/ap_connectivity_to_cisco_wlc.html

   Source: Adapted from community discussion — Skliffi

   References

   • Cisco documentation
   • Cisco documentation

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5. Question 115 · 1003 in bank

   

   Company policy restricts VLAN 10 to be allowed only on SW1 and SW2. All other VLANs can be on all three switches. An administrator has noticed that VLAN 10 has propagated to SW3. Which configuration corrects the issue?

   • ASW1(config)#int gi1/1 SW1(config)#switchport trunk allowed vlan 1-9,11-4094
   • BSW2(config)#int gi1/2 SW2(config)#switchport trunk allowed vlan 10
   • CSW2(config)#int gi1/2 SW2(config)#switchport trunk allowed vlan 1-9,11-4094
   • DSW1(config)#int gi1/1 SW1(config)#switchport trunk allowed vlan 10

   Show answer

   Answer: C

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6. Question 116 · 1003 in bank

   Which First Hop Redundancy Protocol should be used to meet a design requirement for more efficient default gateway bandwidth usage across multiple devices?

   • AGLBP
   • BLACP
   • CHSRP
   • DVRRP

   Show answer

   Answer: A

   Explanation

   glbp: cisco prop, load balancing per request/per host lacp: not a fhrp hsrp: cisco prop, no load balancing, active/passive, useful in DC with VPC vrrp: ietf, for saving an ip address

   Source: Adapted from community discussion — [Removed]

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7. Question 117 · 1003 in bank

   A client device roams between access points located on different floors in an atrium. The access points are joined to the same controller and configured in local mode. The access points are in different AP groups and have different IP addresses, but the client VLAN in the groups is the same. Which type of roam occurs?

   • Ainter-controller
   • Binter-subnet
   • Cintra-VLAN
   • Dintra-controller

   Show answer

   Answer: D

   Explanation

   Reference: https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-3/config-guide/b_cg83/b_cg83_chapter_010011.html

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8. Question 118 · 1003 in bank

   Which DHCP option helps lightweight APs find the IP address of a wireless LAN controller?

   • AOption 43
   • BOption 60
   • COption 67
   • DOption 150

   Show answer

   Answer: A

   Explanation

   A is correct When an AP boots up and receives an IP address from a DHCP server, it looks for option 43 in the DHCP response to determine the IP address of the controller/s to join.

   Source: Adapted from community discussion — [Removed]

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9. Question 119 · 1003 in bank

   Where is radio resource management performed in a Cisco SD-Access wireless solution?

   • ADNA Center
   • Bcontrol plane node
   • Cwireless controller
   • DCisco CMX

   Show answer

   Answer: C

   Explanation

   C is the correct answer. Fabric wireless controllers manage and control the fabric-mode APs using the same general model as the traditional local-mode controllers which offers the same operational advantages such as mobility control and radio resource management. A significant difference is that client traffic from wireless endpoints is not tunneled from the APs to the wireless controller. Instead, communication from wireless clients is encapsulated in VXLAN by the fabric APs which build a tunnel to their first-hop fabric edge node. Wireless traffic it tunneled to the edge nodes as the edge nodes provide fabric services such as the Layer 3 Anycast Gateway, policy, and traffic enforcement. https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html

   Source: Adapted from community discussion — jmaroto

   References

   • Cisco documentation
   • Cisco documentation
   • Cisco documentation
   • Cisco documentation

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10. Question 120 · 1003 in bank

    Refer to the exhibit.

    

    A network engineer is configuring OSPF between router R1 and router R2. The engineer must ensure that a DR/BDR election does not occur on the Gigabit Ethernet interfaces in area 0. Which configuration set accomplishes this goal?

    • AR1(config-if)interface Gi0/0 R1(config-if)ip ospf network point-to-point R2(config-if)interface Gi0/0 R2(config-if)ip ospf network point-to-point
    • BR1(config-if)interface Gi0/0 R1(config-if)ip ospf network broadcast R2(config-if)interface Gi0/0 R2(config-if)ip ospf network broadcast
    • CR1(config-if)interface Gi0/0 R1(config-if)ip ospf database-filter all out R2(config-if)interface Gi0/0 R2(config-if)ip ospf database-filter all out
    • DR1(config-if)interface Gi0/0 R1(config-if)ip ospf priority 1 R2(config-if)interface Gi0/0 R2(config-if)ip ospf priority 1

    Show answer

    Answer: A

    Explanation

    A. R1(config-if)interface Gi0/0 R1(config-if)ip ospf network point-to-point R2(config-if)interface Gi0/0 R2(config-if)ip ospf network point-to-point B. R1(config-if)interface Gi0/0 R1(config-if)ip ospf network broadcast R2(config-if)interface Gi0/0 R2(config-if)ip ospf network broadcast C. R1(config-if)interface Gi0/0 R1(config-if)ip ospf database-filter all out R2(config-if)interface Gi0/0 R2(config-if)ip ospf database-filter all out D. R1(config-if)interface Gi0/0 R1(config-if)ip ospf priority 1 R2(config-if)interface Gi0/0 R2(config-if)ip ospf priority 1 The correct answer is: A

    Source: Adapted from community discussion — xziomal9

    References

    • cisco.com documentation

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350-401 practice, question 111. 1003 questions available.