Building Scalable Cisco Internetworks(BSCI)

1.The Dev-1 and Dev-3 routers are OSPF neighbors over the Ethernet 0/0 connection. Based on the show ip ospf neighbor output from the Dev-1 and Dev-3 routers, which statement is true?

A.Dev-1 is the DR because it has a higher OSPF router priority.
B.Dev-1 is the DR because it has a lower OSPF router ID.
C.Dev-3 is the DR because it has a higher OSPF router priority.
D.Dev-3 is the DR because it has a lower OSPF router ID.
E.Both Dev-1 and Dev-3 are using the default OSPF router priority.
Correct:A
2.Refer to the exhibit. Router RA is not able to ping the loopback Lo0 on router RB. What could the problem be?

A.The loopback addresses have different subnet masks.
B.Router RA is using RIP version 1 while Router RB is using RIP version 2.
C.Router RA is using plain text authentication while Router RB is using encrypted authentication.
D.MD5 authentication is not possible with RIP.
E.The key strings do not match.
F.The key chains do not match.
Correct:C
3.When the BGP path selection process is being performed on a Cisco router, which BGP attribute is used first when determining the best path?
A.local preference
B.MED
C.weight
D.origin
E.next-hop
F.AS-path
Correct:C
4.Which two are characteristics of the IS-IS protocol but not OSPF? (Choose two.)
A.provides for network scalability by allowing the network to be separated into areas
B.provides routing support for multiple network layer protocols
C.three layers of hierarchical routing
D.utilizes SPF algorithm
E.forms adjacencies with all neighbors
F.supports demand circuit routing
Correct:B E
5.Which three characteristics apply to IS-IS but not to OSPF? (Choose three.)
A.encapsulates PDUs directly into a data-link frame
B.uses a DIS and a backup DIS to present the psuedo-node on the LAN
C.uses stubby areas to improve network scalability
D.uses a default IOS metric of 10 on each interface
E.runs PRC (Partial Route Calculations) to calculate IP reachability information
F.uses an on-demand circuit to reduce the hello and LSA flooding across switched WAN links, such as ISDN
Correct:A D E
6.What are two routing protocols defined by the OSI protocol suite at the network layer? (Choose two.)
A.End System-to-End System
B.Routing Information Protocol
C.Interior Gateway Routing Protocol
D.End System-to-Intermediate System
E.Intermediate System-to-Intermediate System
Correct:D E
7.Refer to exhibit. BGP is configured on all routers, synchronization is turned off, and none of the default attributes have been changed except the local preference attribute on R4. Which path will be preferred by R2 to reach the network 100.100.100.0/24?

A.R2 - R3 - R4 - R5 because it has a lower admin distance
B.R2 - R3 - R4 - R5 because it has a higher local preference
C.R2 - R1 because it has the shortest AS-path
D.R2 - R1 because it has a lower local preference
Correct:B
8.Router E is configured with the EIGRP variance 2 command. What path will Router E take to reach Router A?

A.only E-D-A
B.only E-B-A
C.only E-C-A
D.both E-B-A and E-C-A
E.both E-B-A and E-D-A
F.all available paths.
Correct:D
9.LAB

Correct:
10.Drag Drop question

Correct:
Green choice1---->Yellow Choice1
Green choice5---->Yellow Choice2
Green choice2---->Yellow Choice3
Green choice4---->Yellow Choice4
11.Router RTA is configured as follows:RTA (config)#router ripRTA(config-router)#network 10.0.0.0RTA(config-router)#distribute-list 44 in interface BRI0 RTA(config-router)#exitRTA(config)#access-list 44 deny 172.16.1.0 0.0.0.255RTA(config)#access-list 44 permit anyWhat are the effects of this RIP configuration on router RTA? (Choose two.)

A.no routing updates will be sent from router RTA on interface BRI0 to router RTX
B.router RTA will not advertise the 10.0.0.0 network to router RTX
C.the route to network 172.16.1.0 will not be entered into the routing table on router RTA
D.user traffic from the 172.16.1.0 network is denied by access-list 44
E.the routing table on router RTA will be updated with the route to router RTW
Correct:C E
12.Which three statements about IS-IS are true? (Choose three.)
A.L1 routers have no knowledge about routes outside their area.
B.L1/L2 routers maintain a separate Level 1 link-state database and a Level 2 link-state database; they do not advertise L2 routes to L1 routers.
C.To route packets to another area, L1 routers must forward the packets to the L2 router of the destination area.
D.To route packets to another area, L1 routers must forward the packets to an L1/L2 router within their area.
E.L2 routers form adjacencies with L1 and L1/L2 neighbors.
Correct:A B D
13.Which three types of OSPF route entries can be found in the routing table of an internal OSPF router within an OSPF stubby area? (Choose three.)
A.O
B.O IA
C.O* IA
D.O E1
E.O E2
F.O N1
Correct:A B C
14.You have an address range of 172.16.20.192 to 172.16.20.223. Which two configuration commands are used in configuring the area 3 border router for network summarization? (Choose two.)
A.network 172.16.20.192 0.0.0.31 area 3
B.area 3 range 172.16.20.192 172.16.20.223
C.area 3 range 172.16.20.192 255.255.255.224
D.network 172.16.20.192 255.255.255.224 area 3
Correct:A C
15.Refer to the exhibit. What is the correct configuration to enable router P4 to exchange RIP routing updates with router P1 but not with router P3?

A.P4(config)# interface fa0/0P4(config-if)# neighbor 192.168.10.3P4(config-if)# passive-interface fa0/0
B.P4(config)# router ripP4(config-router)# neighbor 192.168.10.3P4(config-router)# passive-interface fa0/0
C.P4(config)# interface fa0/0P4(config-if)# neighbor 192.168.10.3P4(config-if)# passive-interface 192.168.10.34
D.P4(config)# router ripP4(config-router)# neighbor 192.168.10.34 no broadcastP4(config-router)# passive-interface fa0/0
Correct:B
16.Which three are characteristics of IPv6? (Choose three.)
A.An IPv6 address is 128 bits long.
B.An IPv6 header is 20 bits long.
C.An IPv6 header contains the next header field.
D.An IPv6 header contains the protocol field.
E.IPv6 routers send RA messages.
F.An IPv6 header contains the header checksum field.
Correct:A C E
17.Which address type does the IPv6 address FF05:0:0:0:0:0:0:2 specify?
A.unspecified
B.aggregable global unicast
C.link local
D.site local unicast
E.multicast
Correct:E
18.LAB

Correct:
19.Which IS-IS NET represents a locally administered private address?
A.39.0040.0010.0c99.1112.00
B.45.0004.0000.0d35.4554.00
C.47.0010.0000.0a11.3564.00
D.49.0001.0000.0c12.3456.00
Correct:D
20.Which two statements are true concerning IPv6? (Choose two.)
A.Mobile IP is built into IPv6 by default.
B.The leading zeros in an address format are mandatory.
C.Like IPv4, IPv6 broadcasts are sent to all nodes on a LAN segment.
D.IPSec is mandatory and built into IPv6.
Correct:A D
21.Which three types of OSPF route entries can be found in the routing table of an internal OSPF router within an OSPF NSSA area? (Choose three.)
A.O
B.O N2
C.O* N2
D.O E1
E.O E2
Correct:A B C
22.Which BGP attribute is used by BGP to prevent routing loops?
A.AS-path
B.next-hop
C.MED
D.weight
E.local preference
F.origin
Correct:A
23.Based on the topology shown in the network diagram, what optional EIGRP configurations will be required in order to achieve full connectivity within AS 100?

A.Use the EIGRP no auto-summary command on R1 and R2.
B.Use the EIGRP no auto-summary command on R3 and R4.
C.Use the passive interface on the R1 and R2 interface that connects to the 10.1.1.0/24 and 10.1.2.0/24 subnet respectively.
D.Use the passive interface command between the R3 and R1 connection and between the R3 and R2 connection.
E.Use the variance command on R3.
Correct:A
24.Refer to the exhibit. Routers R2, R3, R4, and R5 have OSPF enabled. What should be configured on the routers in area 1 to ensure that all default summary routes and redistributed EIGRP routes will be forwarded from R6 to area 1, and only a default route for all other OSPF routes will be forwarded from R5 to area 1.

A.R5(config-router)# area 1 stubR6(config-router)# area 1 stub
B.R5(config-router)# area 1 stub no-summaryR6(config-router)# area 1 stub
C.R5(config-router)# area 1 nssa R6(config-router)# area 1 nssa
D.R5(config-router)# area 1 nssa no-summaryR6(config-router)# area 1 nssa
Correct:D
25.Which two types of routes will be advertised with the EIGRP configuration as shown? (Choose two.)router eigrp 100network 10.0.0.0eigrp stub
A.static
B.receive-only
C.summary
D.stub
E.connected
F.dynamic
Correct:C E
26.Which three statements are true regarding EIGRP? (Choose three.)
A.By default, EIGRP performs auto-summarization across classful network boundaries.
B.EIGRP uses an area hierarchy to increase network scalability.
C.To speed convergence, EIGRP attempts to maintain a successor and feasible successor path for each destination.
D.EIGRP uses hellos to establish neighbor relationships.
E.By default, EIGRP uses the Dijkstra algorithm to determine the best path to a destination network based on bandwidth and delay.
Correct:A C D
27.Which three statements are true concerning redistributed routes when a default metric is not configured? (Choose three)
A.RIP, IGRP, and EIGRP assign a default metric of 0 (infinity) to redistributed routes and will advertise these routes accordingly.
B.RIP, IGRP, and EIGRP assign a default metric of 0 (infinity) to redistributed routes and will only advertise these routes if a valid seed metric is configured.
C.IS-IS assigns a default metric of 0 to redistributed routes.
D.IS-IS assigns a default metric of 10 to redistributed routes.
E.OSPF assigns a default metric of 1 for routes from all protocols except BGP, which gets a metric of 20.
F.OSPF assigns a default metric of 20 for routes from all protocols except BGP, which gets a metric of 1.
Correct:B C F
28.Given the following configuration:router bgp 6500redistribute staticip route 164.20.0.0 255.255.0.0 null 0Which statement is true?
A.It allows BGP to advertise the 164.20.0.0 /16 network.
B.It results in all traffic for all subnets of 172.16.0.0 being dropped at this router.
C.Cisco prefers that you use the aggregate-address command to distribute IGP routes into BGP.
D.Cisco prefers this method of distributing IGP routes into BGP over using the network command.
Correct:A
29.Refer to the exhibit. BGP sessions are established between all autonomous systems. AS 100 receives updates about network 200.200.200.0/24 from routers R2, R3, R4, and R5 with different MED values. Which router will be chosen as a next hop to reach the network 200.200.200.0/24 if all other attributes are the same?

A.R2
B.R3
C.R4
D.R5
Correct:A
30.Based on the show ip route isis output on R1, which statement is true?

A.The I su 10.1.0.0/23 route is an IS-IS external route.
B.The R1 IS-IS router is an ASBR.
C.The I su 10.1.0.0/23 route is a suppressed route.
D.The I su 10.1.0.0/23 route is a summary route.
E.The R1 IS-IS router is an ABR that belongs to multiple IS-IS areas.
F.The R1 IS-IS router is performing route aggregation and is suppressing the more specific 10.1.0.0/23 prefix.
Correct:D