BGP Quiz (ENCOR, CCNP) - Networkwalks Academy

1. Which BGP Attribute is checked first on Cisco Routers?

WEIGHT

AS_PATH

AGGREGATE

LOCAL_PREF

2. Will the iBGP neighborship be formed between R1 and R2 in this kind of network?

YES

3. Which of these is a valid eBGP configuration?

router bgp 200
neighbor 12.12.12.2 remote-as 200

router bgp 100
neighbor 12.12.12.2 remote-as 100

router bgp 100
neighbor 12.12.12.2 local-as 200

router bgp 200
neighbor 12.12.12.2 remote-as 100

4. Which type of attribute may or may not be recognized by the BGP implementations?

WELL KNOWN

UNKNOWN

TRANSITIVE

OPTIONAL

5. What is ISP Provider Router called in terms of MPLS?

LSR

LSS

LER

ABR

6. Which type of attribute must be recognized by all the BGP implementations?

WELL KNOWN

UNKNOWN

TRANSITIVE

OPTIONAL

7. Which one of these AS numbers can only be used in lab practice (not on public Internet)?

55000

499

65000

100

8. Which route has been selected as best valid by BGP out of these two?

R2#show ip bgp
..
Network Next Hop Metric LocPrf Weight Path
* 7.7.7.7/32 24.24.24.4 0 400 700 i
*> 23.23.23.3 0 300 700 i

BGP Path via AS 300

BGP Path via AS 23

BGP Path via AS 400

BGP Path via AS 1

9. If all BGP metrics are equal for a route then what is the final Tie breaker?

WEIGHT

AS_PATH

LOCAL_PREF

NEIGHBOR IP

10. Does eBGP require Full Mesh Topology?

YES

It depends on topology type

11. Which ones are valid BGP Packet Types?

Open, Update, Notification

Open, Update, Keepalive, Ack

Open, Update, Keepalive, Notification

Shutdown, Update, Keepalive, Notification

12. What is the range of 2-Byte AS Numbers?

1-65535

1-4.2Billion

1-99

1-100

13. Which Port is used by BGP for its communication?

TCP Port 179

TCP Port 99

TCP Port 79

UDP Port 179

14. If same destination route is learned from iBGP & eBGP then which Route will be preferred?

Both will be installed in Routing table

eBGP

iBGP

None

15. Peering with CE (Customer Edge) Routers is done on which type of MPLS ISP Routers?

PE (Provider Edge Router)

IP (Provider Router)

Special Router

LSR (Label Switch Router)

16. What are the two popular methods to fulfil iBGP Full Mesh Requirement?

BGP Next-hop-self
BGP Confederations

BGP Route Reflectors
BGP Next-hop-self

OSPF Route Reflectors
OSPF Backbone Areas

BGP Route Reflectors
BGP Confederations

17. MP-iBGP is run on which type of MPLS based ISP Routers?

LSR (Label Switch Router)

P (Provider Router)

PE (Provider Edge Router)

CE (Customer Edge Router)

18. Which of these protocols can NOT be used within one AS?

IS-IS

OSPF

iBGP

eBGP

19. LOCAL-PREF is used to choose the exit path for an AS:

FALSE

TRUE

20. What is the default value of BGP Local Preference?

100