200-301 practice questions 1,271–1,280

1. Question 1271 · 1334 in bank

   DRAG DROP -

   

   Refer to the exhibit. The Router1 routing table has multiple methods to reach 10.10.10.0/24 as shown. The default Administrative Distance is used. Drag and drop the network conditions from the left onto the routing methods that Router1 uses on the right.

   

   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

   Very annoying question. It should be translated as "Static route will be used if: all protocols are up and/or eBGP&EIGRP&OSPF are down (but not the static route)" and the same for the routing protocols (BGP learned route will be used if: static route is down... and so on)

   Source: Adapted from community discussion — Peter_panda

   References

   • Cisco documentation

   

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2. Question 1272 · 1334 in bank

   An engineer must configure a core router with a floating static default route to the backup router at 10.200.0.2. Which command meets the requirements?

   • Aip route 0.0.0.0 0.0.0.0 10.200.0.2 1
   • Bip route 0.0.0.0 0.0.0.0 10.200.0.2 10
   • Cip route 0.0.0.0 0.0.0.0 10.200.0.2
   • Dip route 0.0.0.0 0.0.0.0 10.200.0.2 floating

   Show answer

   Answer: B

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3. Question 1273 · 1334 in bank

   Why was the RFC 1918 address space defined?

   • Aconserve public IPv4 addressing
   • Bsupport the NAT protocol
   • Cpreserve public IPv6 address space
   • Dreduce instances of overlapping IP addresses

   Show answer

   Answer: A

   Explanation

   A is correct. Private IPv4 addresses were developed to conserve IPv4 address space. NAT was developed as a way to use private addresses and allow for them to be able to communicate with other hosts outside of their LAN. C & D do not deal at all with private IP addresses

   Source: Adapted from community discussion — hp2wx

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4. Question 1274 · 1334 in bank

   

   Refer to the exhibit. After configuring a new static route on the CPE, the engineer entered this series of commands to verify that the new configuration is operating normally. When is the static default route installed into the routing table?

   • Awhen a route to 203.0.113.1 is learned via BGP
   • Bwhen 203.0.113.1 is no longer reachable as a next hop
   • Cwhen the default route learned over external BGP becomes invalid
   • Dwhen the default route learned over external BGP changes its next hop

   Show answer

   Answer: C

   Explanation

   The answer is correct. A static route with a floating static route of 21, which is a higher Administrative Distance (AD) number than Border Gateway Protocol (BGP), will be added to the routing table under the following conditions: The static route will be added to the routing table only if the routes learned via BGP (which have a lower AD) become unavailable. In other words, if the BGP route is lost for some reason (for example, the link goes down or the BGP peer goes down), then the router will start using the static route. Once the BGP route is available again, it will replace the static route in the routing table due to its lower AD. This is because in routing decisions, lower AD values are preferred over higher ones. So, a static route with an AD of 21 will only be used if there are no other routes with an AD less than 21 available.

   Source: Adapted from community discussion — picho707

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5. Question 1275 · 1334 in bank

   

   Refer to the exhibit. Packets are flowing from 192.168.10.1 to the destination at IP address 192.168.20.75. Which next hop will the router select for the packet?

   • A10.10.10.1
   • B10.10.10.11
   • C10.10.10.12
   • D10.10.10.14

   Show answer

   Answer: B

   Explanation

   The answer is B The longest prefix match is used when we have several routes leading to the destination address. The longest prefix match must include the destination IP address. Both 10.10.10.2 and 10.10.10.11 serve as a valid next hop to reach 192.168.20.75 but we will use 10.10.10.1, since the route associated with it has a longer prefix length (more specific) 10.10.10.1 for the route 192.168.20.0/26 (192.168.20.1-192.168.20.62) INCORRECT 10.10.10.11 for route 192.168.20.0/25 (192.168.20.1-192.168.20.126) CORRECT 10.10.10.12 for route 192.168.20.0/27 (192.168.20.1-192.168.20.30) INCORRECT 10.10.10.14 for route 0.0.0.0/0 INCORRECT (Default route is only used if there is no match for the destination's IP address in the routing table)

   Source: Adapted from community discussion — AbdullahMohammad251

   References

   • Cisco documentation

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6. Question 1276 · 1334 in bank

   A router received three destination prefixes: 10.0.0.0/8, 10.0.0.0/16, and 10.0.0.0/24. When the show ip route command is executed, which output does it return?

   • AGateway of last resort is 172.16.1.1 to network 0.0.0.0 o E2 10.0.0.0/8 [110/5] via 192.168.1.1, 0:01:00, Ethernet0 o E2 10.0.0.0/16[110/5] via 192.168.2.1, 0:01:00, Ethernet1 o E2 10.0.0.0/24[110/5] via 192.168.3.1, 0:01:00, Ethernet2
   • BGateway of last resort is 172.16.1.1 to network 0.0.0.0 o E2 10.0.0.0/8 [110/5] via 192.168.1.1, 0:01:00, Ethernet0
   • CGateway of last resort is 172.16.1.1 to network 0.0.0.0 o E2 10.0.0.0/24[110/5] via 192.168.3.1, 0:01:00, Ethernet2
   • DGateway of last resort is 172.16.1.1 to network 0.0.0.0 o E2 10.0.0.0/16[110/5] via 192.168.2.1, 0:01:00, Ethernet1 o E2 10.0.0.0/24[110/5] via 192.168.3.1, 0:01:00, Ethernet2

   Show answer

   Answer: A

   Explanation

   A new route will replace an old route only if it has a better AD. In our case the three routes have the same AD with different prefix lengths, this means all 3 routes will be installed in the routing table.

   Source: Adapted from community discussion — AbdullahMohammad251

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7. Question 1277 · 1334 in bank

   

   Refer to the exhibit. User traffic originating within site B is failing to reach an application hosted on IP address 192.168.0.10, which is located within site A. What is determined by the routing table?

   • AThe traffic is blocked by an implicit deny in an ACL on router2.
   • BThe lack of a default route prevents delivery of the traffic.
   • CThe traffic to 192.168.0.10 requires a static route to be configured in router1.
   • DThe default gateway for site B is configured incorrectly.

   Show answer

   Answer: B

   Explanation

   There is no route in the routing table that matches the destination and there is no default route in the routing table for packets whose destination don't match any of the routes, so the answer is B. You can't determine anything about how a default gateway has been configured by looking at a routing table, default route/gateway of last resort is a different concept than default gateway.

   Source: Adapted from community discussion — oatmealturkey

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8. Question 1278 · 1334 in bank

   Select 2

   

   Refer to the exhibit. Which two values does router R1 use to identify valid routes for the R3 loopback address 1.1.1.3/32? (Choose two.)

   • Alowest cost to reach the next hop
   • Bhighest administrative distance
   • Clowest metric
   • Dhighest metric
   • Elowest administrative distance

   Show answer

   Answer: CE

   Explanation

   1 - longer mask. 2 - lowest AD. 3 - Lowest metric. In the static route the default metric is always 0 (zero), and from what I understand it cannot be changed. That's why, in two static routes to the same subnet destination, the static route is usually chosen among the dynamic protocols, as it always has a metric of 0 (having the adjustment option available for Administrative Distance only, but predominant). Letter A is wrong because the final route decision would be based on the metric that calculates the value up to the network destination (lowest), and not just the cost of the next hop. Also, the expression Cost usually refers to OSPF metric, but even in OSPF the decision of the predominant route is made by the sum of all costs to the final destination, resulting in the value of its metric, the decision is never taken based on the cost of the next hop only. Please correct me if I'm wrong!

   Source: Adapted from community discussion — dropspablo

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9. Question 1279 · 1334 in bank

   What is the role of community strings in SNMP operations?

   • AIt translates alphanumeric MIB output values to numeric values.
   • BIt passes the Active Directory username and password that are required for device access.
   • CIt serves as a sequence tag on SNMP traffic messages.
   • DIt serves as a password to protect access to MIB objects.

   Show answer

   Answer: D

   Explanation

   answer is correct The “SNMP community string” is like a user ID or password that allows access to a router's or other device's statistics (MIB objects)

   Source: Adapted from community discussion — UAE7

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10. Question 1280 · 1334 in bank

    Which syslog severity level is considered the most severe and results in the system being considered unusable?

    • AError
    • BEmergency
    • CAlert
    • DCritical

    Show answer

    Answer: B

    Explanation

    Syslog is a standard for logging messages and events on network devices. It uses severity levels to indicate the severity of the message or event being logged. The syslog severity levels range from 0 (Emergency) to 7 (Debug). Among these severity levels, Emergency (severity level 0) is considered the most severe. Messages logged at this level indicate a catastrophic system failure or complete system shutdown, and the system is considered unusable. This severity level should be reserved for only the most severe and critical events that require immediate attention. Therefore, the syslog severity level that is considered the most severe and results in the system being considered unusable is Emergency (severity level 0).

    Source: Adapted from community discussion — Ciscoman021

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200-301 practice, question 1271. 1334 questions available.