300-410 Administrative Distance Practice Test 2 — 15 Questions

Question 1

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?

Accepted Answer

This is an iBGP route because the distance is 200.. The administrative distance of 200 is the default for iBGP routes. eBGP routes have a default distance of 20. Therefore, this is an iBGP route.

Answer

This is an eBGP route because the distance is 200.

Answer

This is a redistributed route from OSPF into BGP.

Answer

The distance of 200 is non-default and manually configured.

Question 2

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?

Accepted Answer

The EIGRP route will be used because it has a lower administrative distance.. The EIGRP route has a distance of 90, which is lower than the static route's distance of 95. Therefore, the EIGRP route will be preferred and installed in the routing table.

Answer

The static route will be used because it is manually configured.

Answer

Both routes will be used for load balancing.

Answer

Neither route will be used due to a routing loop.

Question 3

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?

Accepted Answer

The EIGRP route will be installed because it has a lower administrative distance.. EIGRP internal routes have a default administrative distance of 90, which is lower than OSPF's default distance of 110. Therefore, the EIGRP route will be preferred and installed in the routing table.

Answer

The OSPF route will be installed because it has a lower metric.

Answer

Both routes will be installed for load balancing.

Answer

Neither route will be installed due to a conflict.

Question 4

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?

Accepted Answer

It sets the administrative distance for EIGRP internal routes to 90 and external routes to 170.. This command sets the administrative distance for EIGRP internal routes to 90 and external routes to 170.

Answer

It sets the administrative distance for all EIGRP routes to 90.

Answer

It sets the administrative distance for EIGRP routes to 170 for all routes learned from neighbors with an AS of 100.

Answer

It sets the metric weights for EIGRP to 90 and 170.

Question 5

Given the following configuration on a router:
```
router ospf 1
 distance 150
```
What is the effect of this configuration?

Accepted Answer

It sets the administrative distance for OSPF routes to 150, overriding the default of 110.. This command sets the administrative distance for all OSPF routes to 150, overriding the default of 110.

Answer

It sets the administrative distance for OSPF routes to 150, but only for intra-area routes.

Answer

It sets the administrative distance for OSPF external routes to 150.

Answer

It sets the administrative distance for OSPF routes to 150, but only for routes learned from a specific neighbor.

Question 6

Examine this configuration snippet:
```
router rip
 distance 120
```
Which statement is true about the effect of this command?

Accepted Answer

It changes the administrative distance for RIP routes to 120, which is the same as the default, so no change occurs.. The `distance` command under RIP sets the administrative distance for all RIP routes to 120, overriding the default of 120? Actually default is 120, so this command would have no effect if set to the same value.

Answer

It changes the administrative distance for RIP routes to 120, which is lower than the default of 130.

Answer

It changes the administrative distance for RIP routes to 120, but only for routes learned from RIP neighbors.

Answer

It changes the administrative distance for RIP routes to 120, but only for routes with a hop count greater than 1.

Question 7

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?

Accepted Answer

It sets the administrative distance for eBGP routes to 20, iBGP routes to 200, and local BGP routes to 200.. The `distance bgp` command sets AD for BGP routes: external (eBGP) to 20, internal (iBGP) to 200, and local to 200.

Answer

It sets the administrative distance for all BGP routes to 20.

Answer

It sets the administrative distance for eBGP routes to 200 and iBGP routes to 20.

Answer

It sets the administrative distance for BGP routes to 20 for routes learned from AS 65000.

Question 8

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?

Accepted Answer

It sets the administrative distance to 150 for routes learned from any neighbor whose source IP matches the wildcard mask 0.255.255.255.. The `distance` command with an access-list qualifier sets AD for routes matching the ACL. Here, routes from the 10.0.0.0/8 range will have AD 150.

Answer

It sets the administrative distance for all EIGRP routes to 150.

Answer

It sets the administrative distance to 150 for all routes in the routing table with destination 10.0.0.0/8.

Answer

It sets the administrative distance to 150 for EIGRP external routes only.

Question 9

Examine this configuration:
```
router ospf 1
 distance ospf intra-area 150 inter-area 160 external 170
```
What is the effect of this command?

Accepted Answer

It sets the administrative distance for intra-area OSPF routes to 150, inter-area to 160, and external to 170.. This command sets different administrative distances for different OSPF route types: intra-area to 150, inter-area to 160, external to 170.

Answer

It sets the administrative distance for all OSPF routes to 150.

Answer

It sets the administrative distance for OSPF routes to 150, but only for routes learned from area 1.

Answer

It sets the administrative distance for OSPF external routes to 170 and leaves intra-area and inter-area at default.

Question 10

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

Accepted Answer

110. The default administrative distance for OSPF is 110.

Answer

90

Answer

100

Answer

120

Question 11

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

Accepted Answer

Connected. Connected routes have an AD of 0, which is the lowest. Static routes are 1, eBGP is 20, EIGRP internal is 90.

Answer

eBGP

Answer

OSPF

Answer

EIGRP internal

Question 12

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?

Accepted Answer

The OSPF route, because OSPF has a lower administrative distance.. OSPF has a default AD of 110, RIP has 120. Lower AD is preferred, so OSPF route is installed.

Answer

The RIP route, because RIP has a lower metric.

Answer

Both routes are installed, and load balancing occurs.

Answer

Neither route is installed; the router will use a default route.

Question 13

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

Accepted Answer

show ip route. The show ip route command displays the routing table including the administrative distance for each route. The show ip protocols command displays routing protocol parameters including the default and any configured administrative distances. The other options either do not show administrative distance or are incorrect commands.

Answer

show ip interface brief

Answer

show running-config | include distance

Answer

show ip ospf interface

Question 14

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

Accepted Answer

A lower administrative distance is preferred over a higher one.. Administrative distance is used to select the best route when multiple routing protocols provide routes to the same destination. A lower administrative distance is preferred. The default administrative distance for OSPF is 110, and for EIGRP it is 90 (internal) or 170 (external).

Answer

The default administrative distance for OSPF is 90.

Answer

Administrative distance is used to compare routes within the same routing protocol.

Answer

The default administrative distance for EIGRP internal routes is 170.

Question 15

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

Accepted Answer

Configure a prefix list to match the routes from the neighbor.. To change the AD for routes from a specific EIGRP neighbor, you must first configure a prefix list to match the routes, then apply it using the distance command in EIGRP router configuration mode. The distance command can specify a different AD for routes matching a prefix list from a specific neighbor.

Answer

Use the distance eigrp command in router configuration mode.

Answer

Configure an access list to permit the routes from the neighbor.

Answer

Use the redistribute command to change the administrative distance.