642-902 Sample Question

QUESTION NO : 14

What technique should be used on BGP edge routers to prevent a multi-homed autonomous
system from becoming a transit system?

A. Advertise with a high MED value all networks that are discovered via external BGP.
B. Set the no-export community attribute on all networks that are advertised externally.
C. Remove the AS-Path information on all routes in the BGP table prior to advertising externally.
D. Set the origin code to incomplete for all networks that are discovered via external BGP.
E. Only advertise networks externally if they have been discovered via internal BGP.
F. Use an outgoing distribution list to filter all networks not originating from inside the autonomous system.

Answer: F

Explanation:

The minimum configuration that guarantees you won't become a transit AS is shown in the following example:
router bgp 65000neighbor 10.1.1.1 filter-list 1 out!ip as-path access-list 1 permit
In this example, the outgoing filter list says that all traffic not sourced from the local AS, should not
be advertised. This will prevent the announcement of routes that originated from other
Autonomous Systems, and prevent traffic destined for networks in another AS from going through
your AS. This is useful real-world information to know and if you configure your network with BGP
in a multi-homed environmet, odds are good that you will want to implement this kind of filter.

Cisco’s John Chambers: Digital Disruption Is An Opportunity For CIOs

Cisco Systems, John Chambers, CEO Inc.CSCO -1.59% said society from the digital disruption is so intense that one third of the management teams of the companies will not make the transition over the next three Chief years.For Information Officer, however, is an opportunity to increase their role in society as technology becomes increasingly important for business. "It's an opportunity to be back in vogue," Chambers said, speaking Tuesday at the conference CIO WSJ network here.

Cisco has experienced interruptions as its core networking business has faced increasing competition from new network schemes using low-cost hardware controlled by independent providers software.Technology sell hardware such as servers, routers and switches are all in risk of digital disruption, said Mr. Chambers. If I do not move from selling boxes to the sales results, would stay again, he said.

Mr. Chambers said that Disco has changed more in the last 12 months in the 30 year history of the company. The company was reorganized and moved from the product silos to integrate horizontally. Cisco has removed 62 business units. The company also replaced 41% of its customer sales executives who moved to the store based on the results.

Reinvention is hard for both the CEO and CIO, Chambers said. However, he acknowledged that information technology has become once again a boardroom level discussion because technology is so deeply rooted in business strategy. Cisco CIO Rebecca Jacoby is an important part of the capacity Mr. Chambers' to make this transformation.

642-902 Sample Question

QUESTION NO : 13

Which BGP command provides the router ID, local preference, next hop, and BGP path in its output? Select the best response.

A. show ip route bgp
B. show ip bgp
C. show ip bgp neighbors
D. show ip bgp summary

Answer: B