4A0-102 Exam Questions

Upon the successful establishment of a TCP session between peers, what type of BGP message is exchanged?

Click the exhibit. An update travels from AS 135000 to AS 137000, traversing both 32-bit and 16-bit AS paths. What will the AS Path be when the update reaches AS 137000?

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

Click the exhibit. Given that ISP 1 and ISP 2 are Tier 2 providers, and that ISP 3 and ISP 4 are Tier 1 providers, what is the most likely relationship between the ISPs?

Click the exhibit. If router A originates an update for prefix 192.168.0.1/27, what will the update contain when it reaches router B?

BGP is configured on two peers, routers A and B. Router A is configured with a Hold Time timer of 60 seconds and a Keepalive timer of 25 seconds. Router B is configured with a Hold...

Which of the following statements regarding the Internet is FALSE?

What are the well-known mandatory BGP attributes?

What kind of BGP attribute is the Local Preference?

Click the exhibit. Assuming a full iBGP mesh in ISP 1, how does router R1 in ISP 1 handle a BGP update received from ISP 2?

Click the exhibit. AS 65540 is using MPLS to provide BGP shortcuts for its iBGP routing. Which routers must be configured with the "configure router bgp igp-shortcuts rsvp-te" comm...

Which of the following is TRUE if the state of one BGP neighbor shows Active?

Which of the following about default BGP behavior is FALSE?

Why is a full mesh of iBGP peers required?

Click the exhibit. Assume all router-IDs are properly configured. Which of the following configurations is required on the Alcatel-Lucent 7750 SR router A to establish an IPv6 BGP...

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 rou...

A router in AS 65100 receives three routes for 138.120.0/16. The first route has an AS Path of 65200 65400 65300 and a local preference of 150. The second route has an AS Path of 6...

The user of an Alcatel-Lucent 7750 SR wants to see the effect of changing an import policy immediately. What is the best command to force re-evaluation of the import policy with mi...

Click the exhibit. Assume all router-IDs are properly configured, and link-local IPv6 addresses are used to establish the eBGP-sessions. Which of the following is the MINIMAL confi...

A BGP router has loopback interfaces 192.168.1.1/27 and 192.168.2.1/27 advertised into BGP using the following export policy. The "aggregate 192.168.0.0/16" command is executed. Wh...

When an Alcatel-Lucent 7750 SR receives a BGP route with an AS Path loop, what action is taken by default?

What happens to a route that is rejected by an import policy on an Alcatel-Lucent 7750 SR?

A router receives two routes from its neighbors: a route from OSPF for 10.0.0.0/24, and a route from BGP for 10.0.0.0/8. Both routes have reachable next hops. Which of the followin...

Click the exhibit. AS 65550 owns CIDR block 10.64.0.0/12. Router R3 is advertising Client1 and Client2 networks into BGP. Router R6 advertises the aggregate 10.64.0.0/12 to AS 6554...

Which of the following prefix-lists is the most specific match for prefixes 192.168.64.1/20 and 192.168.32.5/19?

AS 65550 owns the CIDR block 10.64.0.0/12. Router R4 advertises the aggregate 10.64.0.0/12 to AS65540. Which of the following is TRUE regarding the aggregate route advertisement?

Router R1 is advertising prefix 192.168.1.0/27 with community "no-export. Which routers will receive an update for that prefix?

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?

Router R2 receives a route to 192.168.4.0/29 from router R4 and sets the local preference to 110. Router R1 receives the route to 192.168.4.0/29 from router R3 and sets the local p...

Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP export policy? entry 10 from protocol direct exit action ac...

What is the result of configuring the following policy statement as a BGP import policy on the Alcatel-Lucent 7750 SR? policy-statement "Policy-1" entry 10 from protocol bgp prefix...

An Alcatel-Lucent 7750 SR is configured with a local preference of 250. If it receives a BGP update with a local preference of 500, what local preference is sent to its eBGP peers?

Which of the following is NOT considered an option of import policies?

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

Routers C and E are route reflectors. When the update for prefix 192.168.2.0/24 is received at router F, what will be the Originator_ID attribute?

Click the exhibit. Routers RR1 and RR2 are route reflectors with the same Cluster_ID. When the update for prefix 192.168.1.0/27 is received at router RA2, what are the Originator_I...

Click the exhibit. Router R6 is a route reflector with clients R1, R2 and R5 with local preferences 100, 200 and 500 respectively. Router R3 advertises prefix 192.168.1.0/27 and R2...

Which of the following best describes the purpose of advertise-external?

Click the exhibit. Router R6 is a route reflector with clients R1, R2, R4 and R5. R4 receives three routes from router R6 and is configured with ECMP 3. Given the following BGP con...

Click the exhibit. Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local preference of 200. Router R3 advertises the prefix 192.1...

Which of the following statements regarding BGP Add-Paths is FALSE?

Click the exhibit. Router R6 is a route reflector for clients R1, R2 and R5. Router R5 is configured with a local preference of 200. On which routers is "advertise-external" needed...

Click the exhibit. Router R1 is a route reflector with clients R2, R5 and R6. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6. Assuming that routers R1, R2 and...

Which of the following statements regarding BGP control plane convergence is FALSE?

Click the exhibit. Assuming router A is configured with "next-hop-self", what does the BGP update for prefix 192.168.0.1/27 contain when it arrives at router B?

What kind of BGP attribute is the Multi_Exit_Disc?

Which of the following organizations would an ISP based in Europe approach for an IP prefix assignment?

Which of the following is TRUE if a BGP session state is Connect?

Which of the following regarding the connections between eBGP peers is TRUE?

Click on the exhibit. AS 65540 is using MPLS to provide BGP shortcuts for its iBGP routing. AS 65541 is advertising prefix 192.168.1.0/27 into BGP. Which routers have the BGP updat...