Practice Free 300-410 Exam Online Questions
Refer to the exhibit.
An engineer is troubleshooting an OSPF adjacency issue between directly connected routers R1 and R2.
Which configuration resolves the issue?
A)
B)
C)
D)
- A . Option A
- B . Option B
- C . Option C
- D . Option D
Refer to the exhibit.
Spoke routers do not learn about each other’s routes in the DMVPN Phase2 network.
Which action resolves the issue?
- A . Remove default route from spoke routers to establish a spoke-to-spoke tunnel.
- B . Configure a static route in each spoke to establish a spoke-to-spoke tunnel.
- C . Rectify incorrect wildcard mask configured on the hub router network command.
- D . Disable EIGRP split horizon on the TunnelO interface of the hub router.
Refer to the exhibit.
A network administrator is troubleshooting OSPF adjacency issue by going through the console logs in the router, but due to an overwhelming log message stream it is impossible to capture the problem.
Which two commands reduce console log messages to relevant OSPF neighbor problem details so that the issue can be resolved? (Choose two)
- A . debug condition interface
- B . debug condition ip
- C . debug condition ospf neighbor
- D . debug condition session-id ADJCHG
- E . debug condition all
Refer to exhibit.
Routing protocols are mutually redistributed on R3 and R1. Users report intermittent connectivity to services hosted on the 10.1.1.0/24 prefix. Significant routing update changes are noticed on R3 when the show ip route profile command is run.
How must the services be stabilized?
- A . The issue with using BGP must be resolved by using another protocol and redistributing it into EIGRP on R3
- B . The routing loop must be fixed by reducing the admin distance of iBGP from 200 to 100 on R3
- C . The routing loop must be fixed by reducing the admin distance of OSPF from 110 to 80 on R3
- D . The issue with using iBGP must be fixed by running eBGP between R3 and R4
B
Explanation:
After redistribution, R3 learns about network 10.1.1.0/24 via two paths:
+ Internal BGP (IBGP): advertised from R4 with AD of 200 (and metric of 0)
+ OSPF: advertised from R1 with AD of 110 (O E2) (and metric of 20)
Therefore R3 will choose the path with the lower AD via OSPF But this is a looped path which is received from R3 -> R2 -> R1 -> R3. So when the advertised route from R4 is expired, the looped path is also expired soon and R3 will reinstall the main path from R4. This is the cause of intermittent connectivity. In order to solve this issue, we can lower the AD of iBGP to a value which is lower than 110 so that it is preferred over OSPF-advertised route.
DRAG DROP
Drag and drop the addresses from the left onto the correct IPv6 filter purposes on the right.
Explanation:
HTTP and HTTPs run on TCP port 80 and 443, respectively and we have to remember them.
Syslog runs on UDP port 514 while NTP runs on UDP port 123 so if we remember them we can find out the matching answers easily. But maybe there is some typos in this question as 2001:d88:800:200c::c/126 only ranges from 2001:d88:800:200c:0:0:0:c to 2001:d88:800:200c:0:0:0:f (4 hosts in total). It does not cover host 2001:0D88:0800:200c::1f. Same for 2001:D88:800:200c::e/126, which also ranges from 2001:d88:800:200c:0:0:0:c to 2001:d88:800:200c:0:0:0:f and does not cover host 2001:0D88:0800:200c::1c.
Refer to the exhibit.
The network administrator must configure Cape Town to reach Dubai via Tokyo based on the speeds provided by the service provider. It was noticed that Cape Town is reaching Dubai directly and failed to meet the requirement.
Which configuration fixes the issue?
A)
B)
C)
D)
- A . Option A
- B . Option B
- C . Option C
- D . Option D
Refer to the exhibit.
Which set of commands restore reachability to loopback0?
- A . interface loopback0
ip address 4.4.4.4 255.255.255.0
ip ospf network point-to-point - B . interface loopback0
ip address 4.4.4.4 255.255.255.0
ip ospf network broadcast - C . interface loopback0
ip address 4.4.4.4 255.255.255.0
ip ospf interface area 10 - D . interface loopback0
ip address 4.4.4.4 255.255.255.0
ip ospf interface type network
A
Explanation:
We tested this config in GNS3 (except the LAN interface) but R1 loopback0 was advertised normally on R2 and R2 could reach this loopback0.
Note: Although the configured loopback address is 4.4.4.4/24 but by default OSPF will advertise this route to loopback0 as 4.4.4.4/32 (most specific route to that loopback). In order to override this, we have to change the network type to point-to-point. After this OSPF will advertise the address to loopback as 4.4.4.0/24.
Refer to the exhibit.
The output of the trace route from R5 shows a loop in the network.
Which configuration prevents this loop?
A)
B)
C)
D)
- A . Option A
- B . Option B
- C . Option C
- D . Option D
A
Explanation:
The reason for the loop is that R2 is forwarding the packets destined to 10.1.1.1 to R4, instead of R1. This is because in the redistribute OSPF statement, BW metric has a higher value and delay has a value of 1. So, R2 chooses R4 over R1 for 10.1.1.0/24 subnet causing a loop. Now, R5 learns 10.1.1.0/24 from R3 and advertises the same route to R4, that R4 redistributes back in EIGRP. If R3 sets a tag of 1 while redistributing EIGRP in OSPF, and R4 denies all the OSPF routes with tag 1 while redistributing, it will not advertise 10.1.1.0/24 back into EIGRP. Hence, the loop will be broken.
What is the function of BFD?
- A . It provides uniform failure detection regardless of media type.
- B . It creates high CPU utilization on hardware deployments.
- C . It negotiates to the highest version if the neighbor version differs.
- D . It provides uniform failure detection on the same media type.
Refer to the exhibit.
While troubleshooting an issue on the network, an engineer notices that a TCP Connect operation failed on port 3000 between R101 and R201.
Which command must be configured on R201 to respond to the R101 IP SLA configurations with a control connection on UDP port 1967?
- A . ip sla responder udp-echo ipaddress 1.1.1.1 port 1967
- B . ip sla responder tcp-connect ipaddress 1.1.1.1 port 3000
- C . ip sla responder tcp-connect ipaddress 2.2.2.2 port 3001
- D . ip sla responder