200-301 practice questions 741–750

1. Question 741 · 1334 in bank

   

   Refer to the exhibit. R5 is the current DR on the network, and R4 is the BDR. Their interfaces are flapping, so a network engineer wants the OSPF network to elect a different DR and BDR. Which set of configurations must the engineer implement?

   • AR4(config)#interface gi0/0 R4(config-if)#ip ospf priority 20 R5(config)#interface gi0/0 R5(config-if)#ip ospf priority 10
   • BR5(config)#interface gi0/0 R5(config-if)#ip ospf priority 120 R4(config)#interface gi0/0 R4(config-if)#ip ospf priority 110
   • CR3(config)#interface gi0/0 R3(config-if)#ip ospf priority 255 R2(config)#interface gi0/0 R2(config-if)#ip ospf priority 240
   • DR2(config)#interface gi0/0 R2(config-if)#ip ospf priority 259 R3(config)#interface gi0/0 R3(config-if)#ip ospf priority 256

   Show answer

   Answer: C

   Explanation

   because the value can go from 0 to 255 (default = 1): with 0 you avoid the election to DR / BDR, with higher values you can drive it at will. If all the routers on the LAN have priority = 0, OSPF will not work

   Source: Adapted from community discussion — MikD4016

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2. Question 742 · 1334 in bank

   

   Refer to the exhibit. Web traffic is coming in from the WAN interface. Which route takes precedence when the router is processing traffic destined for the LAN network at 10.0.10.0/24?

   • Avia next-hop 10.0.1.5
   • Bvia next-hop 10.0.1.4
   • Cvia next-hop 10.0.1.50
   • Dvia next-hop 10.0.1.100

   Show answer

   Answer: A

   Explanation

   Since everyone who replied so far doesn't seem to understand my question let me clarify. IRL you should only get one routing entry per network route from the show routing table command; unless you configured load balancing. Obliviously EIGRP has lower AD than OSPF which is why only the EIGRP route should be shown in this show command. I'm asking how on earth could there be an OSPF and EIGRP entry in this show command when there should only be 1 entry for the network route as to my knowledge and google there doesn't seem to be a way you can load balance between 2 routing protocols.

   Source: Adapted from community discussion — RougePotatoe

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3. Question 743 · 1334 in bank

   

   Refer to the exhibit. A packet sourced from 10.10.10.1 is destined for 10.10.8.14. What is the subnet mask of the destination route?

   • A255.255.254.0
   • B255.255.255.240
   • C255.255.255.248
   • D255.255.255.252

   Show answer

   Answer: B

   Explanation

   Correct Answer is B. 255.255.255.240, means /28. The IP 10.10.8.14 falls within the 10.10.8.0/28 range, which is: 10.10.8.0 network ID - 10.10.8.15 Broadcast IP.

   Source: Adapted from community discussion — sdmejia01

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4. Question 744 · 1334 in bank

   

   Refer to the exhibit. An engineer must configure router R2 so it is elected as the DR on the WAN subnet. Which command sequence must be configured?

   • Ainterface gigabitethernet0/0 ip address 10.0.0.34 255.255.255.248 ip ospf priority 0
   • Binterface gigabitethernet0/0 ip address 10.0.0.34 255.255.255.224 ip ospf priority 100
   • Cinterface gigabitethernet0/0 ip address 10.0.1.1 255.255.255.0 ip ospf priority 255
   • Dinterface gigabitethernet0/0 ip address 10.0.1.1 255.255.255.224 ip ospf priority 98

   Show answer

   Answer: B

   Explanation

   Because of the IP Address configuration, it needs to be indented from the 10.0.0.32/27 network (host 10.0.0.33 to 10.0.0.62 - Broadcast 10.0.0.63). Prefix 27 minus 32 = 5 left over used for host (1=2 - 2=4 - 3=8 - 4=16 - 5=32), i.e. we have a range of 32 hosts available in each subnet: Subnet 10.0.0.0 - 10.0.0.32 - 10.0.0.64 - 10.0.0.96 - 10.0.0.128 - 10.0.0.160 - 10.0.0.192 - 10.0.0.224.

   Source: Adapted from community discussion — dropspablo

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5. Question 745 · 1334 in bank

   An engineer is configuring router R1 with an IPv6 static route for prefix 2019:C15C:0CAF:E001::/64. The next hop must be 2019:C15C:0CAF:E002::1. The route must be reachable via the R1 Gigabit 0/0 interface. Which command configures the designated route?

   • AR1(config-if)#ip route 2019:C15C:0CAF:E001::/64 GigabitEthernet 0/0
   • BR1(config)#ip route 2019:C15C:0CAF:E001::/64 GigabitEthernet 0/0
   • CR1(config-if)#ipv6 route 2019:C15C:0CAF:E001::/64 2019:C15C:0CAF:E002::1
   • DR1(config)#ipv6 route 2019:C15C:0CAF:E001::/64 2019:C15C:0CAF:E002::1

   Show answer

   Answer: D

   Explanation

   C is incorrect because the command is entered in the interface R1(config-if). The default route must be entered in the glocal config. Making D the correct answer.

   Source: Adapted from community discussion — Swiz005

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6. Question 746 · 1334 in bank

   

   Refer to the exhibit. Which IPv6 configuration is required for R17 to successfully ping the WAN interface on R18?

   • AR17# ! no ip domain lookup ip cef ipv6 cef ! interface FastEthernet0/0 no ip address duplex auto speed auto ipv6 address 2001:DB8:2::201/64 ! Interface FastEthernet1/0 no ip address duplex auto speed auto ipv6 address 2001:DB8:3::201/64 ! no cdp log mismatch duplex ipv6 route 2001:DB8:4::/64 2001:DB8:4::302
   • BR17# ! no ip domain lookup ip cef ipv6 unicast-routing ! interface FastEthernet0/0 no ip address duplex auto speed auto ipv6 address 2001:DB8:2::201/64 ! Interface FastEthernet1/0 no ip address duplex auto speed auto ipv6 address 2001:DB8:3::201/64 ! no cdp log mismatch duplex ipv6 route 2001:DB8:4::/64 2001:DB8:3::301
   • CR17# ! no ip domain lookup ip cef ! interface FastEthernet0/0 no ip address duplex auto speed auto ipv6 address 2001:DB8:3::201/64 ! Interface FastEthernet1/0 no ip address duplex auto speed auto ipv6 address 2001:DB8:2::201/64 ! no cdp log mismatch duplex ipv6 route 2001:DB8:4::/64 2001:DB8:5::101
   • DR17# ! no ip domain lookup ip cef ipv6 unicast-routing ! interface FastEthernet0/0 no ip address duplex auto speed auto ipv6 address 2001:DB8:2::201/64 ! Interface FastEthernet1/0 no ip address duplex auto speed auto ipv6 address 2001:DB8:3::201/64 ! no cdp log mismatch duplex ipv6 route 2001:DB8:4::/64 2001:DB8:2::201

   Show answer

   Answer: B

   Explanation

   Necessary command "ipv6 unicast-routing" for IPv6 routing, with that we have already eliminated from the beginning the letter "A" and "C" that do not have. Without this command, the IPv6 Routing Table is not created.

   Source: Adapted from community discussion — dropspablo

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7. Question 747 · 1334 in bank

   Select 2

   For what two purposes does the Ethernet protocol use physical addresses?

   • Ato uniquely identify devices at Layer 2
   • Bto allow communication with devices on a different network
   • Cto differentiate a Layer 2 frame from a Layer 3 packet
   • Dto establish a priority system to determine which device gets to transmit first
   • Eto allow communication between different devices on the same network
   • Fto allow detection of a remote device when its physical address is unknown

   Show answer

   Answer: AE

   Explanation

   Ref: Ethernet Address - an overview | ScienceDirect Topics “… Transmission Control Protocol/Internet Protocol Packet Analysis … In a LAN, each node is assigned a physical address, also known as a MAC/Ethernet address. This address is unique to each of the nodes on the LAN and is 6 bytes (48 bits) long, which is burned on the Ethernet card (also known as the network interface card). Ethernet is a byte-count protocol. A node on a LAN broadcasts a frame that is heard by all other nodes; only the node whose Ethernet address matches with the DA in the Ethernet frame copies the frame into its buffer. …”

   Source: Adapted from community discussion — [Removed]

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8. Question 748 · 1334 in bank

   

   Refer to the exhibit. A company is configuring a failover plan and must implement the default routes in such a way that a floating static route will assume traffic forwarding when the primary link goes down. Which primary route configuration must be used?

   • Aip route 0.0.0.0 0.0.0.0 192.168.0.2
   • Bip route 0.0.0.0 0.0.0.0 192.168.0.2 GigabitEthernet1/0
   • Cip route 0.0.0.0 0.0.0.0 192.168.0.2 floating
   • Dip route 0.0.0.0 0.0.0.0 192.168.0.2 tracked

   Show answer

   Answer: A

   Explanation

   (answer B is wrong) Unlike IPv6, in IPv4 static routing configuration, for the next hop you either enter an IP Address of the neighboring interface or your local interface, BUT NEVER BOTH. Example: R1(config)# ip route 192.168.20.0 255.255.255.0 10.12.0.2 Or R1(config)# ip route 192.168.20.0 255.255.255.0 g0/0

   Source: Adapted from community discussion — dropspablo

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9. Question 749 · 1334 in bank

   OSPF must be configured between routers R1 and R2. Which OSPF configuration must be applied to router R1 to avoid a DR'BDR election?

   • Arouter ospf 1 network 192.168.1.1 0.0.0.0 area 0 interface e1/1 ip address 192.168.1.1 255.255.255.252 ip ospf cost 0
   • Brouter ospf 1 network 192.168.1.1 0.0.0.0 area 0 hello interval 15 interface e1/1 ip address 192.168.1.1 255.255.255.252
   • Crouter ospf 1 network 192.168.1.1 0.0.0.0 area 0 interface e1/1 ip address 192.168.1.1 255.255.255.252 ip ospf network broadcast
   • Drouter ospf 1 network 192.168.1.1 0.0.0.0 area 0 interface e1/1 ip address 192.168.1.1 255.255.255.252 ip ospf network point-to-point

   Show answer

   Answer: D

   Explanation

   It was close between A & D. A could have been the answer but cost doesn't affect DR/BDR. If it were "ip ospf priority 0" then yes it would not join DR/BDR election.

   Source: Adapted from community discussion — SVN05

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10. Question 750 · 1334 in bank

    

    Refer to the exhibit. An engineer is updating the R1 configuration to connect a new server to the management network. The PCs on the management network must be blocked from pinging the default gateway of the new server. Which command must be configured on R1 to complete the task?

    • AR1(config)#ip route 172.16.2.0.255.255.255.0 192.168.1.15
    • BR1(config)#ip route 172.16.2.2 255.255.255.248 gi0/1
    • CR1(config)#ip route 172.16.2.2 255.255.255.255 gi0/0
    • DR1(config)#ip route 172.16.2.0 255.255.255.0 192.168.1.5

    Show answer

    Answer: C

    Explanation

    The fact that you specify a host route is the reason you cannot ping any other host than the server in that subnet. Not that you specified the egress interface instead of the next hop address. I tried both scenarios in PT with a host route and they give exactly the same result, as to be expected.

    Source: Adapted from community discussion — splashy

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200-301 practice, question 741. 1334 questions available.