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Total 152 questions
An Alcatel-Lucent 7750 SR receives a route from an iBGP peer with a MED value of 500.
What -
MED value is sent to eBGP peers?
- A. 100
- B. The IGP cost
- C. 500
- D. None
Answer : D
Which of the following is considered a best practice for BGP address planning?
- A. Advertising external networks into IGP.
- B. Using system addresses for setting up iBGP sessions.
- C. Exporting the networks associated with the external links of eBGP peers into BGP.
- D. Optimizing BGP route table by exporting IGP routes into BGP.
Answer : B
Click the exhibit.
AS 65540 routers are iBGP fully-meshed. Assume routers R4, R5 and R6 are configured with addpathsipv4 send 2 receive". Which routes to 192.168.0.1/27 is router R6 expected to have in itsBGP routing table?
- A. Two routes from router R4.
- B. Two routes from router R5.
- C. Two routes; one from router R4 and one from router R5.
- D. Four routes; two from router R4 and two from router R5.
Answer : D
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
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 istheexpected output of "show router bgp routes" on router R5?
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Answer : C
What is the result of configuring the following policy statement as a BGP import policy on theAlcatel-Lucent 7750 SR?
- A. All BGP routes are rejected.
- B. All BGP routes are accepted.
- C. All routes matching prefix list "List-1" are rejected.
- D. All BGP routes matching prefix list "List-1" are rejected.
Answer : D
Click the exhibit.
Router R3 is configured with an import policy to reject updates with an AS Path matching theregular expression ".+ 65540". Which of the following regarding updates originating in
AS 65540 isTRUE?
- A. Router R3 rejects all updates originating in AS 65540.
- B. Router R3 accepts updates received from router R1 and rejects updates transited throughrouter R2.
- C. Router R3 accepts updates transited through router R2 and rejects updates received fromrouter R1.
- D. Router R3 accepts updates from both routers R1 and R2.
Answer : B
Which of the following is TRUE if the state of one BGP neighbor shows Active?
- A. The neighbor will send a Keepalive message.
- B. The router is trying to initiate a TCP connection to that neighbor.
- C. The router received an Open message with the correct parameters.
- D. The router is actively exchanging updates with that neighbor.
Answer : B
Which of the following regarding the atomic aggregate attribute is TRUE?
- A. It is an optional transitive attribute.
- B. It is an optional non-transitive attribute.
- C. The atomic aggregate flag is always set if the aggregator attribute is set.
- D. The atomic aggregate flag is always set if the AS Path information is lost due to aggregation.
Answer : D
A BGP router has loopback interfaces 192.168.1.1/27 and 192.168.2.1/27 advertised into
BGPusing the following export policy. The "aggregate 192.168.0.0/16" command is executed. Whatisthe effect of this configuration?
- A. A single route for 192.168.0.0/16 is advertised.
- B. BGP routes 192.168.1.0/27, 192.168.2.0/27, and 192.168.0.0/16 are advertised.
- C. BGP routes 192.168.1.0/27 and 192.168.2.0/27 are advertised, and 192.168.0.0/16 appears asa "Blackhole" route in the route table only.
- D. The given export policy is invalid.
Answer : C
Click on the exhibit.
AS 65540 is using MPLS to provide BGP shortcuts for its iBGP routing. AS 65541 is advertisingprefix 192.168.1.0/27 into BGP. Which routers have the BGP update for the advertised prefix intheir BGP table?
- A. Routers R1, R2, R3, R4 and R5.
- B. Routers R1and R4 only.
- C. Routers R1, R2, R3 and R4 only.
- D. Routers R1, R4 and R5 only.
Answer : D
What are the well-known mandatory BGP attributes?
- A. Origin, Next Hop and Local Preference.
- B. Local preference, AS Path and Next Hop.
- C. Aggregator, Next Hop and AS Path.
- D. AS Path, Next Hop and Origin.
Answer : D
Which of the following regarding "well-known discretionary'' BGP attributes is TRUE?
- A. They must be recognized by all peers and included in all BGP updates.
- B. They are discarded if not recognized by the recipient.
- C. They must be recognized by all peers and optionally included in BGP updates.
- D. The receiving router sends a notification if a well-known discretionary attribute is not present inan update.
Answer : C
Which of the following statements regarding Internet Exchange Points is FALSE?
- A. They provide both peering and transit services.
- B. They provide services only to Tier 1 service providers.
- C. They can be either public or private.
- D. They provide services at the local, regional and continental levels.
Answer : B
Click the exhibit.
When router A receives the BGP update for the 192.168.0.1/27 prefix, it propagates it to routers Band C. What action is taken by router B when it receives the update?
- A. Router B propagates the BGP update to routers D and C.
- B. Router B propagates the BGP update to router D.
- C. Router B detects duplicates in its BGP database and discards the update.
- D. Router B propagates the update to routers A, C and D.
Answer : B
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