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2021 Dec 4A0-102 rapidshare

Q11. How is the aggregator attribute handled with 32-bit AS numbers? 

A. With the same method and attribute as 16-bit AS numbers. 

B. With the same method as 16-bit AS numbers, but using the AS4_Aggregator attribute. 

C. Aggregation is not yet supported with 32-bit AS numbers. 

D. By using a dummy value of 23456 in the 16-bit AS aggregator field. This value lets the routerknow it needs to read the 32-bit AS number that is contained in the nextTLV. 

Answer: B 


Q12. Consider two Alcatel-Lucent 7750 SRs in AS 65540. Router R1 has system address 10.10.10.1,and router R2 has system address 10.10.10.2. Which of the following configurations on router R2can establish a BGP session with router R1? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: B 


Q13. Which of the following is NOT considered an option of export policies? 

A. Advertising customer networks into BGP. 

B. Sending aggregates that summarize the AS s address space. 

C. Sending MEDs to influence ingress traffic from peers. 

D. Preventing unwanted NLRI from entering the AS. 

Answer: D 


Q14. Assuming that "client1" and "client2" are directly-connected networks, what is the result ofexecuting the following BGP policy? 

A. "client2" routes will be tagged with communities "West" and "North". 

B. "client2" routes will be tagged with communities "West", "North" and "South". 

C. "client2" routes will be tagged with community "West". 

D. "client2" routes will be tagged with community "South". 

Answer: C 

66. Which of the following regarding the TTL of a BGP message is TRUE? 

A. TTL is a well-known mandatory BGP attribute. 

B. The default TTL value of an eBGP message is 1, and 64 for an iBGP message. 

C. The default TTL value of an iBGP message can be modified using the multihop command. 

D. The default TTL value of an eBGP message can be modified using the "ttl-security"command. 

Answer: B 


Q15. Click the exhibit. 

Routers RR1 and RR2are route reflectors with clients R1x and R2x, respectively. Routers RR1 

and RR2 are non-clients of each other, and router R1 is a non-client of both. Which of thefollowing regarding BGP sessions in AS 65540 is TRUE? 

A. Router R1must have at least one BGP session to each of routers R1x and R2x. 

B. Routers R1, RR1 and RR2 must be fully meshed. 

C. Routers R1x and R2x must have at least one BGP session between them. 

D. Routers R1x as well as routers R2x must be fully meshed. 

Answer: B 


Down to date 4A0-102 exam cram:

Q16. Which of the following is FALSE regarding the 16-bit public autonomous system numbers? 

A. They are allocated to the RIRs by ICANN/IANA. 

B. They are used when connecting ASs on the Internet. 

C. They range from 1 to 56319. 

D. They are assigned by the ISPs for enterprise networks. 

Answer: D 


Q17. What will happen if an update is received with an unrecognized optional non-transitive attribute? 

A. The router will accept the update and send a notification. 

B. The router will not accept the update and send a notification. 

C. The router will accept the update and ignore the attribute. 

D. The router will accept the update and propagate the attribute. 

Answer: C 


Q18. Click the exhibit. 

Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have alocal preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6. 

Assuming that none of the routers in AS 65540 is configured with "advertise-external", what is theexpected output of "show router bgp routes" on router R2? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: A 


Q19. Which of the following statements regarding BGP FRR is FALSE? 

A. The router must receive several BGP routes to compute a backup path. 

B. BGP FRR can be triggered by BFD. 

C. The backup path can use the same next hop as the primary path. 

D. BGP peer-tracking can be used to improve BGP FRR failure detection times. 

Answer: C 


Q20. Click the exhibit. 

Which of the following is a valid BGP configuration for router R2? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: A