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BSCI - Building Scaleable Cisco Internetworks : 642-901 Exam

Exam Number/Code: 642-901
Exam Name: BSCI - Building Scaleable Cisco Internetworks

“Building Scalable Cisco Internetworks”, also known as 642-901 exam, is a Cisco certification.
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642-901 BSCI
Building Scalable Cisco Internetworks

Exam Number: 642-901
Associated Certifications: CCNP, CCIP, CCDP
Duration: 90 minutes
Available Languages: English
Click Here to Register: Pearson VUE
Exam Policies: Read current policies and requirements
Exam Tutorial: Review type of exam questions

Exam Description Exam Topics Recommended Training Additional Resources
Exam Description
The Building Scalable Cisco Internetworks (BSCI 642-901) is a qualifying exam for the Cisco Certified Network Professional CCNP®, Cisco Certified Design Professional CCDP®, and Cisco Certified Internetwork Professional CCIP™ certifications. The BSCI 642-901 exam will certify that the successful candidate has important knowledge and skills necessary to use advanced IP addressing and routing in implementing scalability for Cisco ISR routers connected to LANs and WANs. The exam covers topics on Advanced IP Addressing, Routing Principles, Multicast Routing, IPv6, Manipulating Routing Updates, Configuring basic BGP, Configuring EIGRP, OSPF, and IS-IS.

Exam Topics
The following information provides general guidelines for the content likely to be included on the exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes the guidelines below may change at any time without notice.

Implement EIGRP operations.
Explain the functions and operations of EIGRP (e.g., DUAL).
Configure EIGRP routing. (e.g., Stub Routing, authentication, etc.)
Verify or troubleshoot EIGRP routing configurations.

Implement multiarea OSPF operations.
Explain the functions and operations of multiarea OSPF.
Configure multiarea OSPF routing. (e.g., Stub, NSSA, authentication, etc.)
Verify or troubleshoot multiarea OSPF routing configurations.

Describe integrated IS-IS.
Describe the features and benefits of integrated IS-IS.
Configure and verify integrated IS-IS.

Implement Cisco IOS routing features.
Describe, configure or verify route redistribution between IP routing IGPs. (e.g., route-maps, default routes, etc.)
Describe, configure or verify route filtering (i.e., distribute-lists and passive interfaces).
Describe and configure DHCP services (e.g., Server, Client, IP helper address, etc.).

Implement BGP for enterprise ISP connectivity
Describe the functions and operations of BGP.
Configure or verify BGP operation in a non-transit AS (e.g., authentication).
Configure BGP path selection. (i.e., Local Preference, AS Path, Weight or MED attributes).

Implement multicast forwarding.
Describe IP Multicast (e.g., Layer-3 to Layer-2 mapping, IGMP, etc.).
Describe, configure, or verify IP multicast routing (i.e., PIM Sparse-Dense Mode).

Implement IPv6.
Describe IPv6 addressing operations.
Describe IPv6 interoperation with IPv4.
Describe, configure or verify OSPF routing with IPv6 addressing.

QUESTION 27:
The Certkiller network is an EIGRP network consisting of four links (Link A, Link
B, Link C, & Link D). The costs associated with each link is A=1, B=3, C=2, D=4.
According to the variables below, which link is going to be the feasible successor?
A. Link A
B. Link B
C. Link C
D. Link D
Answer: C
Explanation:
Link A is the best link and it therefore the successor. Link C is the next best link, and it is
therefore the feasible successor.
Incorrect Answers
A: Link A is the successor, not the feasible successor.
B: Both Link A and Link C are better than Link B.
D: The feasible successor must have Advertised Destination that is less than the Feasible
Distance.
Note: Feasible distance is the best metric along a path to a destination network, including
the metric to the neighbor advertising that path. Reported distance, or advertised distance,
is the total metric along a path to a destination network as advertised by an upstream
neighbor. A feasible successor is a path whose reported distance is less than the feasible
distance.
Reference: Enhanced Interior Gateway Routing Protocol
http://www.cisco.com/warp/public/103/eigrp1.html
QUESTION 28:
Part of the routing table of router CK1 is displayed below:
S 62.99.153.0/24 [1/0] via 209.177.64.130
172.209.12.0/32 is subnetted, 1 subnets
D EX 172.209.1
[170/2590720] via 209.179.2.114, 06:47:28, Serial0/0/0.1239
62.113.17.0/24 is variably subnetted, 2 subnets, 2 masks
D EX 99.3.215.0/24
[170/27316] via 209.180.96.45, 09:52:10, FastEthernet11/0/0
[170/27316] via 209.180.96.44, 09:52:10, FastEthernet11/0/0
25.248.17.0/24
[90/1512111] via 209.179.66.25, 10:33:13, Serial0/0/0.1400001
[90/1512111] via 209.179.66.41, 10:33:13, Serial0/0/0.1402001
62.113.1.0/24 is variably subnetted, 12 subnets, 2 masks
D 62.113.1.227/32
[90/2611727] via 209.180.96.45, 10:33:13, FastEthernet1/0/0
[90/2611727] via 209.180.96.44, 10:33:13, FastEthernet1/0/0
S* 0.0.0.0/0 [1/0] via 209.180.96.14
From analyzing the above command output, what is the administrative distance of
the external EIGRP routes?
A. 24
B. 32
C. 90
D. 170
E. 27316
F. None of the above
Answer: D
Explanation:
By default an external EIGRP route has a value of 170. By examining the exhibit we see
that this default value of the external EIGRP routes (see D-EX in exhibit) indeed is set to
170. The first value within the brackets display the AD, so with a value of [170/27316]
the AD is 170 and the metric of the route is 27316.
Incorrect Answers:
A, B: This is the subnet mask used for some of the routes in the table.
C: This is the AD of the internal EIGRP routes, which is the default
E: This is the EIGRP metric of the external EIGRP routes.
Reference: What Is Administrative Distance?
http://www.cisco.com/warp/public/105/admin_distance.html
QUESTION 29:
The Certkiller network is shown below, along with the relevant router
configurations:
CK1 # show run
interface Loopback0
ip address 10.10.10.1 255.255.255.0
!
interface Ethernet0
ip address 172.29.1.1 255.255.255.0
media-type 10BaseT
!!
router eigrp 100
redistribute connected
network 172.29.0.0
auto-summary
no eigrp log-neighgbor-changes
!
ip classless
no ip http server
CK2 # show run
interface Ethernet0
ip address 172.29.1.2 255.255.255.0
media-type 10BaseT
!
interface Ethernet1
ip address 172.19.2.2 255.255.255.0
media-type 10BaseT
!
router eigrp 100
network 172.19.0.0
network 172.29.0.0
!
ip classless
no ip http server
CK3 # show run
interface Ethernet1/0
ip address 172.19.2.3 255.255.255.0
!
router eigrp 100
network 172.19.0.0
auto-summary
no eigrp log-neighbor-changes
!
ip classless
ip http server
With the topology found in the graphic, what will the CK1 loopback 0 be in the CK3
routing table?
A. It will show up in the routing table as D 10.0.0/8.
B. It will show up in the routing table as D EX 10.0.0.0/8.
C. It will show up in the routing table as D 10.0.0./24.
D. It will not show up in CK3 routing table because there is no network command on
CK1 .
Answer: B

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