Practice Free 300-410 Exam Online Questions
What are two MPLS label characteristics? (Choose two.)
- A . The label edge router swaps labels on the received packets.
- B . Labels are imposed in packets after the Layer 3 header.
- C . LDP uses TCP for reliable delivery of information.
- D . An MPLS label is a short identifier that identifies a forwarding equivalence class.
- E . A maximum of two labels can be imposed on an MPLS packet.
C,D
Explanation:
Reference: https://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switching-mpls/mpls/4649-mpls-faq-4649.html
What must be configured by the network engineer to circumvent AS_PATH prevention mechanism in IP/VPN Hub and Spoke deployment scenarios?
- A . Use allows in and as-override at all Pes.
- B . Use allowas in and as-override at the PE-Hub.
- C . Use Allowas-in the PE_Hub
- D . Use as-override at the PE_Hub
Refer to the exhibit.
An engineer configured BGP and wants to select the path from 10.77.255.57 as the best path instead of current best path.
Which action resolves the issue?
- A . Configure AS_PATH prepend for the current best path
- B . Configure higher MED to select as the best path
- C . Configure AS_PATH prepend for the desired best path
- D . Configure lower LOCAL_PREF to select as the best path
D
Explanation:
From the output, we learn that the current best path is from 10.57.255.11 (which includes “…valid, confed-external, best“) and this path is 2 ASes away (64955 65003). Although there are some paths with only 1 AS away (path from 172.16.254.234 for example) but they were not chosen the best path so AS_PATH was not used to determine the best path -> Answers A and answer C are not correct. All the paths in the output have metric of 0 and this is the lowest (best) value for this attribute. If we configure higher MED then it is less preferred over other paths -> Answer B is not correct.
Only answer D is left but LOCAL_PREF attribute should be configured with higher value to be preferred so we hope “lower LOCAL_PREF” here means higher value. But this is the best answer.
Refer to the exhibit.
A router receiving BGP routing updates from multiple neighbors for routers in AS 690.
What is the reason that the router still sends traffic that is destined to AS 690 to a neighbor other than 10.222.1.1?
- A . The local preference value in another neighbor statement is higher than 250.
- B . The local preference value should be set to the same value as the weight in the route map.
- C . The route map is applied in the wrong direction.
- D . The weight value in another neighbor statement is higher than 200.
Refer to the exhibit.
A router receiving BGP routing updates from multiple neighbors for routers in AS 690.
What is the reason that the router still sends traffic that is destined to AS 690 to a neighbor other than 10.222.1.1?
- A . The local preference value in another neighbor statement is higher than 250.
- B . The local preference value should be set to the same value as the weight in the route map.
- C . The route map is applied in the wrong direction.
- D . The weight value in another neighbor statement is higher than 200.
An engineer is implementing a coordinated change with a server team. As part of the change, the engineer must configure interlace GigabitEthernet2 in an existing VRF "RED" then move the interface to an existing VRF "BLUE" when the server team is ready.
The engineer configured interface GigabitEthemet2 in VRF "RED"
Which configuration completes the change?
- A . interface GigabitEthernet2
no ip address
vrf forwarding BLUE - B . interface GigabitEthernet2
no vrf forwarding RED
vrf forwarding BLUE
ip address 10.0.0.0 255.255.255.254 - C . interface GigabitEthernet2
no vrf forwarding RED
vrf forwarding BLUE - D . interface GigabitEthernet2
no ip address
ip address 10.0.0.0 255.255.255.254
vrf forwarding BLUE
B
Explanation:
When assigning an interface to a VRF, the IP address will be removed so we have to reassign the IP address to that interface.
Refer to the exhibit.
R1 and R2 have been configured where the neighbor relationship must be authenticated usmg MD5:
The neighbor relationship is not coming up.
Which configuration resolves the issue?
- A . Option A
- B . Option B
- C . Option C
- D . Option D
Refer to the exhibit.
Routers R1 and R2 have established a network adjacency using EIGRP, and both routers are advertising subnets to its neighbor. After issuing the show ip EIGRP topology all-links command in R1, some prefixes are no showing R2 as a successor.
Which action resolves the issue?
- A . Rectify the incorrect router ID in R2.
- B . Enable split-horizon.
- C . Configure the network statement on the neighbor.
- D . Resolve the incorrect metric on the link.
What are the two prerequisites to enable BFD on Cisco routers? (Choose two)
- A . A supported IP routing protocol must be configured on the participating routers.
- B . OSPF Demand Circuit must run BFD on all participating routers.
- C . ICMP must be allowed on all participating routers.
- D . UDP port 1985 must be allowed on all participating routers.
- E . Cisco Express Forwarding and IP Routing must be enabled on all participating routers.
Refer to the exhibit.
An engineer must configure PBR on R1 to reach to 10.2.2.0/24 via R3 AS64513 as the primary path and a backup route through default route via R2 AS64513. All BGP routes are in the routing table of R1. but a static default route overrides BGP routes.
Which PBR configuration achieves the objective?
- A . Option A
- B . Option B
- C . Option C
- D . Option D