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Certifications›300-410›Objectives›Administrative Distance
Objective 108.0

Administrative Distance

300-410 Practice Questions

Full Practice Test →All Objectives

300-410 Administrative Distance — Practice Questions

30 questions from this objective

Question 2mediummultiple choice
Review the full OSPF breakdown →

A network engineer is troubleshooting a BGP route reachability issue. R1 learns the prefix 10.1.1.0/24 via eBGP from R2 with an AD of 20, and via OSPF from R3 with an AD of 110. The engineer notices that R1 installs the OSPF route in the routing table instead of the eBGP route, even though the eBGP route is preferred by default. What is the most likely cause of this behavior?

Question 3hardmultiple choice
Review the full OSPF breakdown →

An engineer is troubleshooting a network where R1 and R2 are running EIGRP, and R2 redistributes a static route for 192.168.1.0/24 into EIGRP. R1 also learns the same prefix via OSPF from R3 with an AD of 110. The engineer observes that R1 prefers the EIGRP external route (AD 170) over the OSPF route. What configuration change would cause this behavior?

Question 4easymultiple choice
Review the full routing breakdown →

A network engineer is troubleshooting a connectivity issue between two sites. R1 learns the prefix 10.0.0.0/8 via RIP (AD 120) from R2, and also via a directly connected interface on R3. The engineer notices that R1 uses the RIP route instead of the connected route. What is the most likely cause?

Question 5mediummultiple choice
Review the full OSPF breakdown →

An engineer is troubleshooting a routing loop between two routers. R1 and R2 are running both OSPF and EIGRP. R1 learns the prefix 172.16.1.0/24 via OSPF with AD 110 and via EIGRP internal with AD 90. The engineer notices that R1 installs the EIGRP route, but traffic to 172.16.1.0/24 is being dropped. What is the most likely issue?

Question 6hardmultiple choice
Open the full BGP breakdown →

A network engineer is troubleshooting a multi-homed BGP setup. R1 receives the prefix 10.1.1.0/24 from two eBGP peers: R2 (AS 100) and R3 (AS 200). The engineer configures the distance bgp 20 20 20 command on R1 to make all BGP routes have the same AD. However, R1 still prefers the route from R2 over R3. What is the most likely reason?

Question 7mediummultiple choice
Review the full OSPF breakdown →

An engineer is troubleshooting a route redistribution issue between OSPF and EIGRP. R1 runs both protocols and redistributes OSPF into EIGRP. The engineer notices that OSPF routes redistributed into EIGRP have an AD of 170, but some routes from OSPF are not being redistributed. What is the most likely cause?

Question 8hardmultiple choice
Review the full OSPF breakdown →

A network engineer is troubleshooting a situation where R1 has two routes to 10.0.0.0/8: one via OSPF (AD 110) and one via RIP (AD 120). The engineer wants R1 to prefer the RIP route. After configuring the distance 80 0.0.0.0 255.255.255.255 under the RIP process, the RIP route is still not preferred. What is the most likely reason?

Question 9mediummultiple choice
Review the full OSPF breakdown →

An engineer is troubleshooting a network where R1 and R2 are running iBGP, and R1 learns the prefix 192.168.1.0/24 from R2 with an AD of 200. R1 also learns the same prefix via OSPF from R3 with AD 110. The engineer notices that R1 uses the iBGP route. What configuration change would cause this?

Question 10hardmultiple choice
Review the full OSPF breakdown →

A network engineer is troubleshooting a route selection issue between two routing protocols. R1 learns the prefix 10.0.0.0/8 via both IS-IS (AD 115) and OSPF (AD 110). The engineer wants R1 to prefer the IS-IS route. After configuring the distance 105 ip 10.0.0.0 0.255.255.255 under the IS-IS process, the IS-IS route is still not preferred. What is the most likely cause?

Question 11mediummultiple choice
Study the full EIGRP explanation →

A network engineer runs the following command on Router R1:

R1# show ip route 10.1.1.0

Routing entry for 10.1.1.0/24 Known via "eigrp 100", distance 170, metric 30720 Redistributing via eigrp 100 Last update from 192.168.1.2 on GigabitEthernet0/0, 00:00:05 ago Routing Descriptor Blocks:

* 192.168.1.2, from 192.168.1.2, 00:00:05 ago, via GigabitEthernet0/0

Route metric is 30720, traffic share count is 1

Based on this output, which statement is correct?

Question 12mediummultiple choice
Review the full OSPF breakdown →

A network engineer runs the following command on Router R2:

R2# show ip route 192.168.10.0

Routing entry for 192.168.10.0/24 Known via "ospf 1", distance 110, metric 20 Redistributing via ospf 1 Last update from 10.0.0.1 on GigabitEthernet0/1, 00:00:10 ago Routing Descriptor Blocks:

* 10.0.0.1, from 10.0.0.1, 00:00:10 ago, via GigabitEthernet0/1

Route metric is 20, traffic share count is 1

Based on this output, what is the most likely origin of this route?

Question 13mediummultiple choice
Open the full BGP breakdown →

A network engineer runs the following command on Router R3:

R3# show ip route 172.16.1.0

Routing entry for 172.16.1.0/24 Known via "bgp 65000", distance 20, metric 0 Redistributing via bgp 65000 Last update from 192.168.1.1 00:00:15 ago Routing Descriptor Blocks:

* 192.168.1.1, from 192.168.1.1, 00:00:15 ago

Route metric is 0, traffic share count is 1

Based on this output, what can be concluded about the administrative distance?

Question 14easymultiple choice
Study the full EIGRP explanation →

A network engineer runs the following command on Router R4:

R4# show ip route 10.10.10.0

Routing entry for 10.10.10.0/24 Known via "connected", distance 0, metric 0 (connected) Redistributing via eigrp 100 Last update from 10.10.10.1 on GigabitEthernet0/0, 00:00:00 ago Routing Descriptor Blocks:

* 10.10.10.1, via GigabitEthernet0/0

Route metric is 0, traffic share count is 1

Based on this output, which statement is true?

Question 15mediummultiple choice
Review the full OSPF breakdown →

A network engineer runs the following command on Router R5:

R5# show ip route 192.168.100.0

Routing entry for 192.168.100.0/24 Known via "static", distance 1, metric 0 Redistributing via ospf 1 Last update from 10.0.0.2 on GigabitEthernet0/1, 00:00:05 ago Routing Descriptor Blocks:

* 10.0.0.2, via GigabitEthernet0/1

Route metric is 0, traffic share count is 1

Based on this output, what is the likely issue if this route is not being preferred over an EIGRP route with distance 90?

Question 16easymultiple choice
Review the full OSPF breakdown →

A network engineer runs the following command on Router R6:

R6# show ip route 10.0.0.0

Routing entry for 10.0.0.0/8 Known via "eigrp 100", distance 90, metric 28160 Redistributing via eigrp 100 Last update from 192.168.1.1 on GigabitEthernet0/0, 00:00:10 ago Routing Descriptor Blocks:

* 192.168.1.1, from 192.168.1.1, 00:00:10 ago, via GigabitEthernet0/0

Route metric is 28160, traffic share count is 1

Additionally, an OSPF route for the same prefix is learned with distance 110. Which route will be installed in the routing table?

Question 17mediummultiple choice
Open the full BGP breakdown →

A network engineer runs the following command on Router R7:

R7# show ip route 172.16.0.0

Routing entry for 172.16.0.0/16 Known via "bgp 65000", distance 200, metric 0 Redistributing via bgp 65000 Last update from 10.0.0.1 00:00:20 ago Routing Descriptor Blocks:

* 10.0.0.1, from 10.0.0.1, 00:00:20 ago

Route metric is 0, traffic share count is 1

Based on this output, what type of BGP route is this?

Question 18hardmultiple choice
Study the full EIGRP explanation →

A network engineer runs the following command on Router R8:

R8# show ip route 10.2.2.0

Routing entry for 10.2.2.0/24 Known via "eigrp 100", distance 90, metric 28160 Redistributing via eigrp 100 Last update from 192.168.2.1 on GigabitEthernet0/0, 00:00:05 ago Routing Descriptor Blocks:

* 192.168.2.1, from 192.168.2.1, 00:00:05 ago, via GigabitEthernet0/0

Route metric is 28160, traffic share count is 1

R8 also has a static route to 10.2.2.0/24 with next-hop 192.168.3.1 configured with distance 95. Which route will be used?

Question 19easymultiple choice
Review the full OSPF breakdown →

A network engineer runs the following command on Router R9:

R9# show ip route 192.168.50.0

Routing entry for 192.168.50.0/24 Known via "ospf 1", distance 110, metric 20 Redistributing via ospf 1 Last update from 10.0.0.1 on GigabitEthernet0/0, 00:00:10 ago Routing Descriptor Blocks:

* 10.0.0.1, from 10.0.0.1, 00:00:10 ago, via GigabitEthernet0/0

Route metric is 20, traffic share count is 1

R9 also has an EIGRP route for the same prefix with distance 90 and metric 28160. Which route will be installed?

Question 20mediummultiple choice
Study the full EIGRP explanation →

Consider the following partial configuration on a Cisco IOS-XE router: ```

router eigrp 100
 network 10.0.0.0

distance eigrp 90 170 ``` What is the effect of the `distance eigrp 90 170` command?

Question 21mediummultiple choice
Review the full OSPF breakdown →

Given the following configuration on a router: ```

router ospf 1

distance 150 ``` What is the effect of this configuration?

Question 22mediummultiple choice
Review the full routing breakdown →

Examine this configuration snippet: ```

router rip

distance 120 ``` Which statement is true about the effect of this command?

Question 23mediummultiple choice
Review the full OSPF breakdown →

Consider the following configuration on a router running BGP and OSPF: ```

router bgp 65000

distance bgp 20 200 200 ``` What is the effect of this command?

Question 24mediummultiple choice
Study the full EIGRP explanation →

A network engineer configures the following on a router: ```

router eigrp 100

distance 150 10.0.0.0 0.255.255.255 ``` What is the intended effect?

Question 25mediummultiple choice
Review the full OSPF breakdown →

Examine this configuration: ```

router ospf 1

distance ospf intra-area 150 inter-area 160 external 170 ``` What is the effect of this command?

Question 26easymultiple choice
Review the full OSPF breakdown →

What is the default administrative distance for OSPF routes on a Cisco IOS-XE router?

Question 27mediummultiple choice
Review the full routing breakdown →

Which of the following protocols has the lowest default administrative distance on a Cisco router?

Question 28easymultiple choice
Review the full OSPF breakdown →

According to Cisco IOS default behavior, if a router learns the same route via both RIP and OSPF, which route will be installed in the routing table?

Question 29mediummulti select
Review the full routing breakdown →

Which TWO commands can be used to verify the administrative distance of a route in a Cisco IOS router? (Choose TWO.)

Question 30mediummulti select
Review the full routing breakdown →

Which TWO statements about administrative distance are true? (Choose TWO.)

Question 31hardmulti select
Study the full EIGRP explanation →

Which TWO configuration steps are required to change the administrative distance for routes learned from a specific neighbor in EIGRP? (Choose TWO.)

More Administrative Distance questions available in the full practice test.

Continue Practising →
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Route Maps and Route Filtering

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Route Summarization

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All 300-410 Objectives

  • 100.Layer 3 Technologies35%
  • 101.EIGRP Troubleshooting
  • 102.OSPF Troubleshooting (v2/v3)
  • 103.BGP Troubleshooting
  • 104.Route Redistribution
  • 105.Policy-Based Routing (PBR)
  • 106.VRF-Lite
  • 107.Route Maps and Route Filtering
  • 108.Administrative Distance
  • 109.Route Summarization
  • 110.Bidirectional Forwarding Detection (BFD)
  • 200.VPN Technologies20%
  • 201.MPLS Operations
  • 202.MPLS L3VPN
  • 203.DMVPN
  • 204.IPsec Site-to-Site VPN
  • 205.IPv6 Tunneling Techniques
  • 300.Infrastructure Security20%
  • 301.Device Access Control
  • 302.IPv4 Access Control Lists
  • 303.IPv6 Traffic Filtering and uRPF
  • 304.Control Plane Policing (CoPP)
  • 305.IPv6 First Hop Security
  • 400.Infrastructure Services25%
  • 401.Device Management
  • 402.SNMP Troubleshooting
  • 403.Network Logging and Syslog
  • 404.Embedded Event Manager (EEM)
  • 405.IP SLA
  • 406.NetFlow and Flexible NetFlow
  • 407.SPAN, RSPAN, and ERSPAN
  • 408.DHCP (IPv4 and IPv6)
  • 409.NAT and PAT