300-410 practice questions 441–450

1. Question 441 · 578 in bank

   

   Refer to the exhibit. The router is redistributing a prefix 172.16.10.0/24 that should have been filtered. Which action resolves the issue?

   • AAdd the route in access-list 10.
   • BMatch the tag 666 for the route in the route map.
   • CRemove route-map sequence 20.
   • DPermit the route in route-map sequence 20.

   Show answer

   Answer: C

   Explanation

   A question with a bad screenshot, anyway, the point is that a route map has an implicit deny. So if you are removing the route-map sequence 20, then all remaining routes are blocked. Anyway, i understand the frustration, but try and think on "the best way to solve the problem". And i understand that both questions and answers are of bad quality, that does not mean you cannot answer them. sidenote: for non-english speakers having low quality questions and answers is adding even more complexity to the exams...

   Source: Adapted from community discussion — Pietjeplukgeluk

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2. Question 442 · 578 in bank

   

   Refer to the exhibit. SW101 could not transfer its startup configuration to a TFTP server. No ACL is configured on the switch, and it can successfully ping the host. Which action resolves the issue?

   • AOpen UDP port 69 on the TFTP server.
   • BOpen UDP port 179 on the TFTP server.
   • CConfigure a FW in the middle to allow bidirectional communication for TFTP.
   • DStart the TFTP server on the host.

   Show answer

   Answer: D

   Explanation

   When I test Cisco Router and TFTPd64 by changing security as High and Read only settings in server, the error show as (Permission denied) %Error opening tftp://10.1.1.1/test-router14-confg (Permission denied) When I test be changing default port 69 to another, the error show as (Timed out) %Error opening tftp://10.1.1.1/test-router14-confg (Timed out)

   Source: Adapted from community discussion — KZM

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3. Question 443 · 578 in bank

   What is an advantage of MPLS Layer 3 VPN deployment?

   • APlanning and modifications are required for the customer intranet before migrating to Layer 3 VPN.
   • BScalable VPNs are created using connection-oriented, point-to-point, or multipoint overlay connections.
   • CQoS provides performance with policy and support for a best-effort service level in an MPLS VPN.
   • DSecurity is provided at the edge of the provider network through encryption.

   Show answer

   Answer: C

   Explanation

   In my opinion C sounds correct , with MPLS TE you can specify bandwidth of the links and have QOS B sounds more like DMVPN...

   Source: Adapted from community discussion — DavideDL

   References

   • cisco.com documentation

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4. Question 444 · 578 in bank

   

   Refer to the exhibit. Traffic from R3 to the central site does not use alternate paths when R3 cannot reach 10.10.10.2. Traffic on R3 destined to R4 takes an alternate route via 10.10.10.6 when 10.10.10.4 is not accessible from R3. Which configuration switches traffic destined to 10.10.10.2 from R3 on the alternate path?

   • AR3(config)#ip route 192.168.10.1 255.255.255.255 10.10.10.2 track 20
   • BR6(config)#ip route 10.10.10.3 255.255.255.255 10.0.0.30
   • CR3(config)#track 20 ip sla 20 reachability
   • DR2(config)#ip route 10.10.10.3 255.255.255.255 10.0.0.6

   Show answer

   Answer: A

   Explanation

   Just to add, the IPs in the image are not correct, so that makes the question harder. Just note that R5 (loopback) IP ends with .5 and R6 (loopback) IP ends with .6 hand that helps reading the question better.

   Source: Adapted from community discussion — Pietjeplukgeluk

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5. Question 445 · 578 in bank

   A newly installed router starts establishing an LDP session from another MPLS router to which it is not directly connected. Which LDP message type responds by target router to the initiating router using UDP protocol?

   • Anotification message
   • Bsession message
   • Cadvertisement message
   • Dextended discovery message

   Show answer

   Answer: D

   Explanation

   Correct anwer is D. https://www.cisco.com/c/en/us/td/docs/ios/mpls/configuration/guide/convert/mp_ldp_book/mp_ldp_overview.html Nondirectly Connected MPLS LDP Sessions If the LSR is more than one hop from its neighbor, it is nondirectly connected to its neighbor. For these nondirectly connected neighbors, the LSR sends out a targeted Hello message as a UDP packet, but as a unicast message specifically addressed to that LSR. The nondirectly connected LSR responds to the Hello message and the two routers begin to establish an LDP session. This is called extended discovery.

   Source: Adapted from community discussion — Tedmus

   References

   • Cisco documentation
   • juniper.net documentation

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6. Question 446 · 578 in bank

   

   Refer to the exhibit. Router R2 VLAN 10 users cannot get dynamic IP addresses from R1. Which action resolves the issue?

   • AEliminate the port security feature on the ports of switch SW2.
   • BIdentify the host with the duplicate IP address.
   • CConfigure the IP helper feature on the Interface GigabitEthernet 0/2 of router R2.
   • DExpand the address scope of VLAN 10.

   Show answer

   Answer: D

   Explanation

   The question states " Which Action Resolves The Issue" B - is only identyficaton, we do not do any acton. D - we actally do something here "expanding address scope" - Which for me is correct D is the correct answer

   Source: Adapted from community discussion — cloud29

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7. Question 447 · 578 in bank

   

   Refer to the exhibit. A PC is configured to obtain an IP address automatically, but it receives an IP address only from the 169.254.0.0 subnet. The DHCP server logs contained no DHCPDISCOVER message from the MAC address of the PC. Which action resolves the issue?

   • AConfigure a DHCP reservation on the server for the PC.
   • BConfigure an ip helper-address on the router to forward DHCP messages to the server.
   • CConfigure DHCP Snooping on the switch to forward DHCP messages to the server.
   • DConfigure a static IP address on the PC and exclude it from the DHCP pool.

   Show answer

   Answer: B

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8. Question 448 · 578 in bank

   How are CE advertised routes segmented from other CE routers on an MPLS PE router?

   • Awith a combination of VRF-Lite and MP-BGP
   • Bby pushing MPLS labels advertised by LDP on customer routes
   • Cby enabling multiple instances of BGP, one for each CE router
   • Dby assigning CE-facing interfaces to different VRFs

   Show answer

   Answer: D

   Explanation

   D. by assigning CE-facing interfaces to different VRFs In an MPLS (Multiprotocol Label Switching) network, Customer Edge (CE) routers are typically connected to Provider Edge (PE) routers. To keep the routes from different CE routers segregated on the PE router, Virtual Routing and Forwarding (VRF) is commonly used. Each VRF acts as a separate routing table, effectively isolating routes from one CE router from routes of another CE router. So, the correct answer is D.

   Source: Adapted from community discussion — Bombbear_W

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9. Question 449 · 578 in bank

   

   Refer to the exhibits. All the serial links between R1, R2, and R3 have the same bandwidth. Users on the 192.168.1.0/24 network report slow response times while they access resources on network 192.168.3.0/24. When a traceroute is run on the path, it shows that the packet is getting forwarded via R2 to R3 although the link between R1 and R3 is still up.

   

   What must the network administrator do to fix the slowness?

   • AAdd a static route on R1 using the next hop of R3.
   • BRemove the static route on R1.
   • CChange the Administrative Distance of EIGRP to 5.
   • DRedistribute the R1 static route to EIGRP.

   Show answer

   Answer: B

   Explanation

   You are right. If as most people say the correct answer is b - and the static route to 192.168.3 is removed on R1 - then R1 has no route to that network - from the output its not learned from eigrp. However we have to assume the route to network 192.168.3/24 will show up in the routing table via eigrp when the static route is removed. Also no other answer fully satisfies the solution. If answer A read - add a floating static route to r3 i would be inclined to go for that - but it doesn't !

   Source: Adapted from community discussion — Surfside92

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10. Question 450 · 578 in bank

    Which Layer 3 VPN attribute installs customer routes in the VRF?

    • ARD
    • BRT
    • Cextended-community
    • DMPLS label

    Show answer

    Answer: B

    Explanation

    "You can use a route map to filter routes that are eligible for import or export in a VRF, based on the route target extended community attributes of the route." https://www.cisco.com/c/en/us/td/docs/dcn/nx-os/nexus9000/103x/configuration/label-switching/cisco-nexus-9000-series-nx-os-label-switching-configuration-guide-103x/m-configuring-mpls-layer-3-vpns.pdf RT is more specific than extended-community.

    Source: Adapted from community discussion — Horsefeathers

    References

    • Cisco documentation

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300-410 practice, question 441. 578 questions available.