300-410 IP SLA Practice Test 2 — 15 Questions

Question 1

A network engineer runs the following command on Router R1:

R1# show ip sla statistics 5

Round Trip Time (RTT) for Index 5
   Latest RTT: 50 ms
   Latest RTT (milliseconds): 50
   Latest RTT (microseconds): 50000
   Number of successes: 100
   Number of failures: 0
   Operation time to live: Forever
   Output: OK

R1# show track 3
Track 3
  IP SLA 5 reachability
  Reachability is Up
    1 change, last change 00:10:00
  Latest operation return code: OK
  Latest RTT (milliseconds): 50
  Tracked by:
    ip route 0.0.0.0 0.0.0.0 192.168.3.1 track 3

R1# show ip route 0.0.0.0 0.0.0.0
Routing entry for 0.0.0.0/0, supernet
  Known via "static", distance 1, metric 0, candidate default path
  Last update from 192.168.3.1 on GigabitEthernet0/0
  Routing Descriptor Blocks:
  * 192.168.3.1, via GigabitEthernet0/0
      Route metric is 0, traffic share count is 1

Based on this output, which statement is correct?

Accepted Answer

The static route is active and reachable via 192.168.3.1.. The track is up, and the static route is present in the routing table. The IP SLA has 100% success. This indicates everything is working correctly.

Answer

The static route is not installed because the track is up.

Answer

The IP SLA operation is failing, causing the track to go down.

Answer

The IP SLA operation has a threshold violation.

Question 2

A network engineer runs the following command on Router R1:

R1# show ip sla statistics 6

Round Trip Time (RTT) for Index 6
   Latest RTT: 0 ms
   Latest RTT (milliseconds): 0
   Latest RTT (microseconds): 0
   Number of successes: 0
   Number of failures: 100
   Operation time to live: Forever
   Output: No connection

R1# show track 4
Track 4
  IP SLA 6 reachability
  Reachability is Down
    3 changes, last change 00:05:00
  Latest operation return code: No connection
  Latest RTT (milliseconds): 0
  Tracked by:
    ip route 0.0.0.0 0.0.0.0 192.168.4.1 track 4

R1# show ip route 0.0.0.0 0.0.0.0
% Network not in table

Based on this output, which statement is correct?

Accepted Answer

The target 192.168.4.1 is unreachable, causing the IP SLA to fail and the static route to be removed.. The track is down due to 'No connection', and the static route is not in the routing table. This indicates that the IP SLA probe cannot reach the target, and the tracked route has been removed.

Answer

The static route is still present because the track is down.

Answer

The IP SLA operation is successful, but the track is misconfigured.

Answer

The IP SLA operation has a threshold violation, but the route is still active.

Question 3

A network engineer runs the following command on Router R1:

R1# show ip sla statistics 7

Round Trip Time (RTT) for Index 7
   Latest RTT: 500 ms
   Latest RTT (milliseconds): 500
   Latest RTT (microseconds): 500000
   Number of successes: 30
   Number of failures: 70
   Operation time to live: Forever
   Output: Over threshold

R1# show track 5
Track 5
  IP SLA 7 reachability
  Reachability is Up
    1 change, last change 00:20:00
  Latest operation return code: Over threshold
  Latest RTT (milliseconds): 500
  Tracked by:
    ip route 0.0.0.0 0.0.0.0 192.168.5.1 track 5

Based on this output, which statement is correct?

Accepted Answer

The IP SLA operation has a high failure rate, but the track remains up due to the configured threshold parameters.. The track is up despite the 'Over threshold' return code. This can happen if the track is configured to use a different threshold for reachability (e.g., based on number of consecutive successes or a different percentage). The IP SLA has 30 successes and 70 failures, but the track still considers it up, likely because the threshold for down is higher (e.g., 100% failures).

Answer

The track is down because the IP SLA return code is 'Over threshold'.

Answer

The static route is removed because of the threshold violation.

Answer

The IP SLA operation is not responding because of a network issue.

Question 4

Given the following partial configuration on router R1:

ip sla 10
 icmp-echo 192.168.1.1 source-ip 10.0.0.1
 frequency 10
ip sla schedule 10 life forever start-time now

Which statement best describes the effect of this configuration?

Accepted Answer

It sends ICMP echo requests from 10.0.0.1 to 192.168.1.1 every 10 seconds.. The configuration creates an IP SLA operation that sends ICMP echo probes to 192.168.1.1 every 10 seconds, using source IP 10.0.0.1. The schedule starts immediately and runs indefinitely.

Answer

It sends ICMP echo requests from 192.168.1.1 to 10.0.0.1 every 10 seconds.

Answer

It sends ICMP echo requests every 10 seconds but only after the first successful reply.

Answer

It sends ICMP echo requests only once and then stops.

Question 5

Examine this IP SLA configuration on router R2:

ip sla 20
 udp-jitter 203.0.113.10 16384 source-ip 198.51.100.1 source-port 16384
 frequency 30
ip sla schedule 20 life forever start-time now

Which statement is true?

Accepted Answer

It measures one-way delay and jitter using UDP packets.. The configuration measures UDP jitter by sending UDP packets to destination 203.0.113.10 on port 16384, sourced from 198.51.100.1 with source port 16384, every 30 seconds.

Answer

It measures only packet loss, not delay or jitter.

Answer

It uses TCP to measure round-trip time.

Answer

It sends ICMP echo requests to test connectivity.

Question 6

Consider this IP SLA configuration on router R3:

ip sla 30
 icmp-echo 192.168.2.1
 frequency 5
ip sla schedule 30 life forever start-time now

What is missing from this configuration?

Accepted Answer

A source IP address is missing; the router will use the outgoing interface IP.. The configuration lacks a source IP address. While optional, without a source-ip, the router uses the outgoing interface IP, which may not be desired for tracking specific paths.

Answer

The frequency is too low; it should be at least 60 seconds.

Answer

The destination IP is invalid; it must be a multicast address.

Answer

The operation type is wrong; it should be udp-echo.

Question 7

Given this IP SLA configuration on router R4:

ip sla 40
 icmp-echo 10.10.10.1 source-ip 172.16.1.1
 frequency 15
ip sla schedule 40 life forever start-time now

Which statement is true?

Accepted Answer

The source IP 172.16.1.1 must be configured on an interface of R4.. The configuration sends ICMP echo probes from 172.16.1.1 to 10.10.10.1 every 15 seconds. The source IP is explicitly set.

Answer

The source IP 172.16.1.1 can be any IP address, even if not local.

Answer

The operation will fail because frequency 15 is too high.

Answer

The operation will use TCP instead of ICMP.

Question 8

Examine this IP SLA configuration on router R5:

ip sla 50
 icmp-echo 10.20.20.1 source-ip 192.168.10.1
 frequency 10
ip sla schedule 50 life forever start-time now

What is the effect of this configuration?

Accepted Answer

It will continuously monitor reachability to 10.20.20.1 from source 192.168.10.1.. The configuration creates an IP SLA operation that sends ICMP echo probes to 10.20.20.1 every 10 seconds, using source IP 192.168.10.1. It starts immediately and runs forever.

Answer

It will stop after 10 successful replies.

Answer

It will measure jitter between the two IPs.

Answer

It will only work if 10.20.20.1 is directly connected.

Question 9

Consider this IP SLA configuration on router R6:

ip sla 60
 udp-echo 203.0.113.1 2000 source-ip 198.51.100.1
 frequency 20
ip sla schedule 60 life forever start-time now

What is the purpose of this configuration?

Accepted Answer

It tests UDP connectivity by sending a UDP packet and expecting a response.. The configuration sends UDP packets to destination 203.0.113.1 on port 2000, sourced from 198.51.100.1, every 20 seconds. It tests UDP connectivity and response time.

Answer

It tests ICMP echo instead of UDP.

Answer

It measures jitter and packet loss.

Answer

It will only work if the destination is a Cisco router.

Question 10

What is the default frequency (in seconds) for an IP SLA operation if not explicitly configured?

Accepted Answer

60 seconds. The default frequency for IP SLA operations is 60 seconds. This means probes are sent every 60 seconds unless overridden with the frequency command.

Answer

10 seconds

Answer

30 seconds

Answer

120 seconds

Question 11

Which IP SLA operation type is used to measure one-way delay, jitter, and packet loss?

Accepted Answer

udp-jitter. The udp-jitter operation type measures one-way delay, jitter, and packet loss by sending a stream of UDP packets and analyzing the responses.

Answer

icmp-echo

Answer

udp-echo

Answer

tcp-connect

Question 12

What is the default timeout value (in milliseconds) for an IP SLA operation?

Accepted Answer

5000 ms. The default timeout for IP SLA operations is 5000 milliseconds (5 seconds). If no response is received within this time, the probe is considered failed.

Answer

1000 ms

Answer

10000 ms

Answer

60000 ms

Question 13

Which TWO commands can be used to verify IP SLA operations on a Cisco IOS device? (Choose TWO.)

Accepted Answer

show ip sla statistics. The 'show ip sla statistics' command displays the latest statistics for each IP SLA operation, and 'show ip sla reaction-configuration' shows the threshold and reaction settings. 'show ip sla configuration' shows the configuration but not live statistics. 'show ip sla monitor' is a legacy command not used in modern IOS. 'show ip sla summary' is not a valid command.

Answer

show ip sla configuration

Answer

show ip sla monitor

Answer

show ip sla summary

Question 14

Which TWO statements about IP SLA ICMP echo operations are true? (Choose TWO.)

Accepted Answer

It measures round-trip time (RTT) between the source and destination.. IP SLA ICMP echo measures round-trip time (RTT) by sending ICMP echo requests and waiting for replies. It does not measure jitter (that requires UDP jitter operations). It can be configured with a frequency and a timeout, and the operation must be started with the 'ip sla schedule' command. The source IP can be specified, but the destination must be an IP address, not a hostname unless DNS resolution is configured.

Answer

It measures jitter in the network path.

Answer

The destination can be specified as a hostname without any additional configuration.

Answer

The operation runs continuously by default after configuration.

Question 15

Which TWO configuration steps are required to use IP SLA for tracking an object in a routing protocol like EIGRP? (Choose TWO.)

Accepted Answer

Configure an IP SLA operation (e.g., icmp-echo).. To use IP SLA for routing protocol tracking, you must first configure an IP SLA operation (e.g., ICMP echo) and then create a tracking object that references the IP SLA operation. The tracking object is then used in the routing protocol configuration (e.g., 'track 1 ip sla 1 reachability'). Configuring a static route or a prefix-list is not required for tracking itself. The 'ip sla schedule' is needed to start the operation, but the question asks for steps to use it for tracking, so the tracking object and its reference are key.

Answer

Configure a static route pointing to the tracked interface.

Answer

Apply a prefix-list to filter routes based on the tracking object.

Answer

Schedule the IP SLA operation with the 'ip sla schedule' command.