d1
Examine the following protocols, which two are used for IP Security?
A. Generic Routing Encapsulation (GRE) and Internetwork Packet Exchange (IPX)(EIGRP)
B. Border Gateway Protocol (BGP) and Enhanced Interior Gateway Routing Protocol
C. Authentication Header (AH) and Encapsulating Security Payload (ESP)
D. Virtual Private Dial-Up Network (VPDN) and GRE
Correct Answer: C
Section: WAN VPN Explanation
Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 12

QUESTION 157
What is SNMP?
A. Simple Network Management Protocol
B. Simple Network Monitoring Protocol
C. Sampling Network Management Process
D. Simple Network Maintenance Procedure
Correct Answer: A
Section: Management – Operations Explanation

Simple Network Management Protocol

Simple Network Management Protocol (SNMP) is an IP application layer protocol that has become the standard for the exchange of management information between network devices. SNMP was initially described in RFC 1157. It is a simple solution that requires little code to implement, which allows vendors to build SNMP agents on their products. SNMP runs over User Datagram Protocol (UDP) and therefore does not inherently provide for sequencing and acknowledgment of packets, but it still reduces the amount of overhead used for management information.
Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 15

QUESTION 158
When building Global network businesses , which three principles should be used?
A. Customer focus, continuous standardization, and core versus context
B. Customer focus, centralization, and core versus context
C. Customer focus, decentralization, and core versus edge
D. Customer focus, decentralization, and core versus context
Correct Answer: A
Section: PPDIOO Explanation
From JollyFrog P4S Core versus Context:
My analysis in a nutshell is that core activities are those that increase the sustainable competitive advantage of a company. Core activities create value for customers in a way that is hard for competitors to replicate, and by doing so increase the market power of the company. Investors notice this, and reward the company with a higher stock price.
Of course in today’s market, core doesn’t stay core for very long as competitors copy successful companies. At one point a web site to distribute marketing information was a core activity. Now it is a context activity, something that is required by the market that does not differentiate. Political factors also drive context to encroach on core. Everyone wants to feel important, meaning to feel like core, even though their activities might more reasonably be considered context. In most organizations, context activities compete for resources with core, and when they win, the company loses.
My recommendation is that companies never lose site of the distinction between core and context as they do business. Invest as much as possible in core activities. Seek to reduce costs and outsource context activities. If you have to cut spending in downturn, don’t do it across the board, cutting core and context by equal measures. Instead, seek to actually increase your investment in core while making even more drastic cuts in context to achieve the total cost-reduction goal.
Reference: http://rolandtanglao.com/archives/2004/04/06/
core_versus_context_core_creates_value_that_competitors_cant_replicate
PodCast about Core versus Context by Geoffrey Moore (recommended viewing) : http://ecorner.stanford.
edu/authorMaterialInfo.html?mid=1327

QUESTION 159
For the following items, which component of the CiscoWorks product allows a network administrator to define and manage service levels?
A. Service assurance agent (SAA)
B. Service level manager (SLM)
C. Collection Manager (CM)
D. Service level agreement (SLA)
Correct Answer: B
Section: Management – Operations Explanation
Service Level Manager:
The SLM Collection Manager 2.0 bundled product is part of the CiscoWorks2000 Service Management Solution (SMS). The CiscoWorks2000 SMS enables IT managers to establish and validate Service Level Agreements (SLAs) for their Cisco-based networks. The SLM Collection Manager (also referred to as the remote CM), is a distributable software agent designed to perform job management, data collection, and aggregation of performance data needed for network management applications. This in turn enables the Service Assurance Agent (SA Agent) testing in the Cisco IOS software to validate that SLAs are being met. Customers can scale their SMS by deploying additional remote CMs as required.

http://www.cisco.com/en/US/products/sw/cscowork/ps2428/products_quick_start09186a0080108a46.html

QUESTION 160
NAT-PT is an IPv6-IPv4 translation mechanism. What is NAT-PT?
A. Network address translation – translates RFC 1918 addresses to public IPv4 addresses
B. Network address translation-protocol translation; translates between IPv4 and IPv6 addresses
C. Next address translation? Next port translation
D. Network addressable transparent- translates network addresses to ports
Correct Answer: B
Section: IP addressing Explanation
RFC 2766 describes NAT-PT, which provides translation between IPv6 and IPv4 hosts. NAT-PT operates similarly to the NAT mechanisms to translate IPv4 private addresses to public address space. NAT-PT binds addresses in the IPv6 network to addresses in the IPv4 network and vice versa. Figure 9-12 shows a network using NAT-PT. RFC 4699 is a recent Informational RFC that recommends that NAT-PT be placed into historical status and recommends against its use (although the protocol is still supported in IOS).
Cisco also introduces the Cisco 6PE for Multiprotocol Label Switching (MPLS) service providers. Cisco 6PE allows IPv6 islands to communicate over an MPLS/IPv4 core network using MPLS label-switched paths (LSP). The Cisco 6PE routers are dual stack. The method relies on BGP extensions in the IPv4 6PE routers to exchange IPv6 reachability information, along with an MPLS label for each IPv6 address prefix announced.
Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 9

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