cisco 300-510 practice test
implementing cisco service provider advanced routing solutions (spri)
Question 1
An engineer wants to map a multicast IP address to a multicast MAC. How many bits are used to make the conversion?
- A. low-order 23 bits
- B. higher-order 23 bits
- C. lower-order 24 bits
- D. high-order 24 bits
Answer:
a
Question 2
Refer to the exhibit. This network is deployed with all connected links configured to run IS-IS. The routing protocol is enabled globally on each router, and the network engineer expects full routing information to be shared among all routers. R5 is receiving routes from R4 but is missing routes from R1. Which action corrects the issue so that all routes are shared among the routers?
- A. Configure R5 in the same area as R1.
- B. Configure all routers to reside in the same area.
- C. Configure R1 and R5 as Level 1/Level 2 routers.
- D. Configure R3 as a Level 1 /Level 2 router.
Answer:
b
Question 3
For which reason can two BGP peers fail to establish a neighbor relationship?
- A. Their BGP send-community strings are misconfigured
- B. Their BGP timers are mismatched
- C. Their remote-as numbers are misconfigured
- D. They are both activated under an IPv4 address family
Answer:
c
Question 4
Refer to the exhibit. An engineer working for a private telecommunication company with an employee id: 1234:56:789 notices that the customer network going through AS30-AS65001-AS65000 is experiencing packet drops when it accesses an application at 172.16.20.1/32 in the DC cloud. The BGP link between AS20 and AS30 is inaccessible because of a fiber cut. Routers RL, RN, and RZ are configured with confederation identifier 10. Which action resolves this issue?
- A. RX(config)#router bgp 65001 -RX(config-router)# bgp confederation peers 65000
- B. RB(config)#router bgp 30 -RB(config-router)# neighbor 10.10.10.3 remote-as 65001
- C. RM(config)#router bgp 65000 -RM(config-router)# bgp confederation peers 65001
- D. RX(config)#router bgp 65001 -RX(config-router)# no synchronizationRX(config-router)# bgp confederation identifier 10
Answer:
d
Question 5
A network operator working for a telecommunication company with an employee id: 4074:92:707 is planning to implement the Nonstop Forwarding (NSR) feature on the customers core network. After getting the configuration ready for NSR. on which router should the operator implement NSR changes?
- A. on the CE router
- B. on the ASBR router
- C. on the ABR router
- D. on the PE router
Answer:
d
Question 6
Refer to the exhibit. Which effect of this configuration is true?
- A. It sets the keepalive timer to 30 seconds and the hold timer to 240 seconds.
- B. It sets the keepalive timer to 30 milliseconds and the hold timer to 240 milliseconds
- C. It sets the hold timer to 30 milliseconds and the keepalive timer to 240 milliseconds
- D. It sets the hold timer to 30 seconds and the keepalive timer to 240 seconds
Answer:
a
Reference:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/command/irg-cr-book/bgp-s1.html#wp1552800140
Question 7
Refer to the exhibit. P1 and PE3 Cisco IOS XR routers are directly connected and have this configuration applied. The BGP session is not coming up. Assume that there is no IP reachability problem and both routers can open tcp port 179 to each other. Which two actions fix the issue? (Choose two.)
- A. Change MD5 to HMAC-SHA1-12
- B. Change MD5 to HMAC-ESP
- C. Change MD5 to SHA-1
- D. Change MD5 to HMAC-MD5
- E. Remove the send and accept lifetime under key 1
Answer:
ad
Reference:
https://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs_r4-0/security/configuration/guide/sc40crsbook_chapter5.html
Question 8
In a PIM-SM environment, which mechanism determines the traffic that a receiver receives?
- A. The receiver explicitly requests its desired traffic from the RP on the shared tree.
- B. The receiver explicitly requests traffic from a single source, which responds by forwarding all traffic.
- C. The RP on the shared tree floods traffic out of all PIM configured interfaces.
- D. The receiver explicitly requests traffic from each desired source, which responds by sending all traffic.
Answer:
d
Question 9
Refer to the exhibit. What is the relationship between Router 1 and Router 2?
- A. Router 1 centrally learns the topology of the network to aid in SR-TE path selection, and Router 2 is a node that feeds Router 1 topology information
- B. Router 1 and Router 2 are participating in SR-TE tunnels and are both head-end routers
- C. Router 1 and Router 2 centrally learn the topology of the network to aid in SR-TE path selection for peers
- D. Router 2 is the head-end router in an SR-TE tunnel, and it is learning topology of the network from the PCE enabled on Router 1
Answer:
d
Question 10
Refer to the exhibit. Traffic flow from router R1 to router R6 is delay-sensitive. It must consider potential link-failure and node-failure conditions. Which configuration must an engineer apply to router R1 to route traffic to router R6 if router R2 fails?
- D. None
Answer:
c