The Candid Test On CCIE-r&s-bgp Quiz
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CCIE routing and switching is a certification that every expert engineer needs to undertake in order to plan, operate and troubleshoot converged network infrastructure. Take up the candid test on CCIE- r&s- bgp quiz below and get ready for the upcoming test next week. All the best and keep revising!
- 1.By default, what BGP uses to choose the best route?
- A.
Lowest Weight
- B.
Lowest Local Preference
- C.
Shortest AS Path
- D.
Highest Origin
- E.
Highest Multi-Exit Discriminator
- F.
Lowest Metric
- 2.What is the first attribute BGP verifiy in its decision process to find the best route, defined by RFC 1771, for each NLRI?
- A.
NEXT_HOP is reachable (the router has a route in its routing table.
- B.
The route is synchronized by IGP
- C.
The NLRI is an ATOMIC AGGREGATOR
- D.
The router has an interface connected to the ORIGIN Path Attribute
- E.
The AS_PATH contains the NEXT_HOP
- 3.An NLRI is simply an IP prefix and a prefix length?
- A.
True
- B.
False
- 4.How BGP communicates with its neighbors?
- A.
Using multicast address 224.0.0.2 (all routers)
- B.
Using unicast neighbor address to TCP port 179
- C.
Using unicast neighbor address to UDP port 520
- D.
Using reliable layer 3 protocol (IP/112)
- E.
Using multicast address 224.0.0.2 to UDP port 1985
- F.
Using multicast address 224.0.0.2 to UDP port 3222
- 5.By default, after how many times a neighbor is considered to have failed (ie.: What is the keepalive timer default value)?
- A.
5 seconds
- B.
15 seconds
- C.
30 seconds
- D.
60 seconds
- E.
120 seconds
- F.
180 seconds
- G.
240 seconds
- H.
300 seconds
- 6.By default, keepalive are sent at which interval?
- A.
5 seconds
- B.
15 seconds
- C.
30 seconds
- D.
60 seconds
- E.
120 seconds
- F.
180 seconds
- G.
240 seconds
- H.
300 seconds
- 7.What makes a neighbor internal BGP (iBGP)?
- A.
When the neighbor is in the same confederation
- B.
R1(config)# router bgp 3 internal
- C.
The command: neighbor 1.1.1.1 peer-internal
- D.
When the neighbor is in the same AS
- 8.What the command "neighbor update-source" do?
- A.
Modify the NEXT_HOP attribute advertised to a neighbor
- B.
Strip Private AS from the AS_PATH attribute advertised to a neighbor
- C.
Determine the NLRI used to reach a neighbor
- D.
Determine the source IP address used to reach a neighbor
- 9.How is the destination IP address used to discover and reach a neighbor determined?
- A.
By the NEXT_HOP attribute advertised by a neighbor
- B.
Manually configured using the neighbor command
- C.
Send in the HELLO messages by neighbor
- D.
Define within the peer-group of the confederation
- 10.With Cisco IOS 12.3 and later, BGP perform Auto-Summary by default?
- A.
True
- B.
False
- 11.What authentication method is supported by BGP?
- A.
Plain Text
- B.
MD5
- C.
None. BGP does not support authentication
- D.
RADIUS
- E.
EAP
- 12.
Which config should be used in order to take advantage of the redundant links between R3 and R4 (assuming the matching config is done on the other side)?- A.
Configure two static route to the other loopback address (on for 10.1.34.0/24 and 10.1.134.0/24). Configure neighbor 3.3.3.3 update-source looback0 and neighbor 3.3.3.3 ebgp-multihop 2(on R4).
- B.
EBGP neighbor command should use aggregator option
- C.
Nothing, eBGP will load balance automatically
- D.
EBGP neighbor command should use peer-group option
- 13.
What config should be used if R3 and R4 are using their loopback as source IP?
- A.
EBGP neighbor command should use update-source with loopback IP address
- B.
EBGP neighbor command should use ebgp-peer option
- C.
Nothing, eBGP will advertise connected loopback automatically
- D.
EBGP neighbor command should use ebgp-multihop option
- 14.Select all the properties that define a neighbor in the state "Active"
- A.
Listen on port TCP 179
- B.
The router initiate TCP connection with that neighbor
- C.
The router formed TCP connection with that neighbor
- D.
The router sent OPEN message to that neighbor
- E.
The router received OPEN message from that neighbor
- F.
The router has Established a BGP connection with that neighbor
- G.
None of the above
- 15.Select all the properties that define a neighbor in the state "Open Sent"
- A.
Listen on port TCP 179
- B.
The router initiate TCP connection with that neighbor
- C.
The router formed TCP connection with that neighbor
- D.
The router sent OPEN message to that neighbor
- E.
The router received OPEN message from that neighbor
- F.
The router has Established a BGP connection with that neighbor
- G.
None of the above
- 16.Select all the properties that define a neighbor in the state "Idle"
- A.
Listen on port TCP 179
- B.
The router initiate TCP connection with that neighbor
- C.
The router formed TCP connection with that neighbor
- D.
The router sent OPEN message to that neighbor
- E.
The router received OPEN message from that neighbor
- F.
The router has Established a BGP connection with that neighbor
- G.
None of the above
- 17.What happen when the keepalive timer within the OPEN message of each BGP neighbor mismatch?
- A.
They stay in "Open Sent" state
- B.
They use the lower keepalive timer value
- C.
They use the higher keepalive timer value
- D.
They stay in "Connect" state
- 18.What BGP message type are used to establish a neighbor relationship and exchange basic parameters?
- A.
Hello
- B.
Advertisement
- C.
Update
- D.
Notification
- E.
Reset
- F.
Open
- G.
KeepAlive
- 19.What BGP message type are used to maintain a neighbor relationship?
- A.
Hello
- B.
Advertisement
- C.
Update
- D.
Notification
- E.
Reset
- F.
Open
- G.
KeepAlive
- 20.What BGP message type are used to exchange NLRI?
- A.
Hello
- B.
Advertisement
- C.
Update
- D.
Notification
- E.
Reset
- F.
Open
- G.
KeepAlive
- 21.What BGP message type are used when BGP errors occur; causing a reset to the neighbor relationship when sent?
- A.
Hello
- B.
Advertisement
- C.
Update
- D.
Notification
- E.
Reset
- F.
Open
- G.
KeepAlive
- 22.What command(s) allow to reset BGP neighbor connections?
- A.
R1 (router-config)# reset neighbor 172.16.8.8
- B.
R1# reset bgp all
- C.
R1# clear ip bgp *
- D.
R1 (router-config)# neighbor 172.16.8.8 shutdown
- E.
R1 (router-config)# clear connections
- F.
R1 (router-config)# reset connections
- G.
R1 (router-config)# clear neighbor *
- H.
R1 (router-config)# reset neighbor *
- 23.Which command enables logging of BGP neighbor status changes (up or down) and resets for troubleshooting network connectivity problems and measuring network stability?
- A.
Debug bgp neighbor
- B.
Neighbor 10.1.1.1 log
- C.
Bgp log-neighbor-changes
- D.
Ip bgp logging
- 24.What is the BGP Routing Information Base (RIB)?
- A.
BGP routing policies for all the Network Layer Reachability Information (NLRI) learn by BGP
- B.
BGP topology table, that holds the Network Layer Reachability Information (NLRI) learn by BGP
- C.
BGP neighbors table
- D.
BGP forwarding logic base on Path Attributes learned
- 25.Which command allows a Soft Reconfiguration of BGP? That is, allows a BGP peer to reapply its routing policies without closing its neighbor connections?
- A.
R1 (router-config)# neighbor 172.16.8.8 soft-reset
- B.
R1# reset bgp soft
- C.
R1# clear ip bgp * soft
- D.
R1 (router-config)# neighbor 172.16.8.8 shutdown soft
- E.
R1 (router-config)# clear connections
- F.
R1 (router-config)# reset connections
- G.
R1 (router-config)# clear neighbor * soft
- H.
R1 (router-config)# reset neighbor *
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