QUESTION NO: 6
Refer to the partial topology diagram shown.Service Provider 1 (SP1) assigned the customer an AS number of 65275. Service Provider 2 (SP2) assigned an AS number of 65745 to the customer. The customer decides to use AS 65275 internally.Which of the following is the correct partial router configuration to cause updates from CR1 to SP1 to report a source AS of 65275, while updates from CR2 to SP2 report the source AS of 65745 in addition to AS 65275?
A. ! CR1router bgp 65275 neighbor 1.1.1.1 remote-as 65274 neighbor 10.1.1.2 remote-as 65275 ! CR2router bgp 65745 neighbor 2.2.2.2 remote-as 65732 neighbor 2.2.2.2 local-as 65275 neighbor 10.1.1.1 remote-as 65275
B. ! CR1router bgp 65275 neighbor 1.1.1.1 remote-as 65274 neighbor 10.1.1.2 remote-as 65275 ! CR2router bgp 65275 neighbor 2.2.2.2 remote-as 65732 neighbor 2.2.2.2 local-as 65745 neighbor 10.1.1.1 remote-as 65275
C. ! CR1router bgp 65275 neighbor 1.1.1.1 remote-as 65274 neighbor 1.1.1.1 local-as 65745 neighbor 10.1.1.2 remote-as 65275 ! CR2router bgp 65275 neighbor 2.2.2.2 remote-as 65732 neighbor 2.2.2.2 local-as 65745 neighbor 10.1.1.1 remote-as 65275
D. ! CR1router bgp 65275 neighbor 1.1.1.1 remote-as 65274 neighbor 10.1.1.2 remote-as 65275 ! CR2router bgp 65745 neighbor 2.2.2.2 remote-as 65732 neighbor 2.2.2.2 local-as 65745 neighbor 10.1.1.1 remote-as 65275
Answer: B
QUESTION NO: 7
Which two statements about a transit AS are correct? (Choose two.)
A. A transit AS uses an IGP like OSPF or ISIS to propagate the external networks within the transit AS.
B. Routes between ASs are always exchanged via eBGP.
C. iBGP sessions can be established between non directly connected routers.
D. A transit AS has eBGP connection(s) to only one external AS.
E. Core routers within a transit AS normally use default routing to reach the external networks.
Answer: B,C
QUESTION NO: 8
Which one of these statements regarding intraconfederation EBGP sessions is correct?
A. Member-AS numbers are removed when a router sends a BGP update over an intraconfederation EBGP session.
B. An intraconfederation EBGP session behaves like an IBGP session when propagating routing updates.
C. Updates from an intraconfederation EBGP neighbor are subject to the BGP split horizon rule.
D. Intraconfederation EBGP sessions must be established over loopback interfaces.
E. Intraconfederation EBGP neighbors must be directly connected.
Answer: B
QUESTION NO: 9
When verifying the BGP neighbor relationships on your router, you issue the show ip bgp summary command and there were no results. Which of the following could be the problem?
A. The neighbor link is down.
B. All BGP updates from the BGP neighbor were filtered out.
C. The TCP session to the BGP neighbor can’t be established.
D. There are no BGP neighbors configured.
Answer: D
QUESTION NO: 10
Refer to the diagram. What should be changed within AS 50001 to improve the route reflector design?
A. Remove the IBGP session between the two redundant RRs (R1 and R2).
B. Add an IBGP session between each pair of clients (between R3 and R4, R4 and R5).
C. Make R4 the RR and R1 and R2 its clients. R3 and R5 should be a non-RR/non-client.
D. Add a physical link between R1 and R2.
E. Add a physical link between the clients (R3 and R4, and between R4 and R5).
Answer: D