2013 Latest Cisco DESGN (640-864) Exam 151-155


Which mechanism will be often used by service providers to define their service offerings and to differentiate their services from their competitors?
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.
Service level agreement (SLA):
Defines the availability of the network. Networked applications rely on the underlying network between the client and server to provide its functions. There are multiple levels of application availability that can be part of a negotiated SLA with a service provider. Organizations have to work with the carrier to define what level of service, such as bandwidth, allowed latency, and loss, is acceptable to the organization.
Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition
Service Assurance Agent:
The SA Agent is an both an enhancement to and a new name for the Response Time Reporter (RTR) feature that was introduced in Cisco IOS release 11.2. The feature allows you to monitor network performance between a Cisco router and a remote device (which can be another Cisco router, an IP host, or a mainframe host) by measuring key Service Level Agreement (SLA) metrics such as response time, network resources, availability, jitter, connect time, packet loss, and application performance. This feature enables you to perform troubleshooting, problem analysis, and notification based on the statistics collected by the SA Agent.

What is the virtual information store used within SNMP called?
C. Protocol data unit (PDU)
D. Abstract Syntax Notation One (ASN.1)
Correct Answer: A
Section: Management – Operations Explanation
A Management Information Base (MIB) is a collection of information that is stored on the local agent of the managed device. MIBs are organized hierarchically and are accessed by the NMS. MIBs are databases of objects organized in a tree-like structure, with each branch containing similar objects. Each object has a unique object identifier (number) that uniquely identifies the managed object of the MIB hierarchy. Read and write community strings are used to control access to MIB information.
Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 15

Which standard language will be used by SNMP to define the device information to be stored?
B. ASN.1
D. Agents
Correct Answer: B
Section: Management – Operations Explanation
Each individual manageable feature in the MIB is called a MIB variable. The MIB module is a document that describes each manageable feature that is contained in an agent. The MIB module is written in Abstract Syntax Notation 1 (ASN.1). Three ASN.1 data types are requireD. name, syntax, and encoding. The name serves as the object identifier. The syntax defines the objects data type (integer or string). The encoding data describes how information associated with a managed object is formatted as a series of data items for transmission on the network. Some examples of standard managed objects that can be obtained from the MIB tree are as follows:
Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 15

Which WAN scenario might be appropriate for queuing solutions?
A. A newly implemented WAN connection has yet to demonstrate sufficient WAN statistics for congestion-level tracking.
B. A WAN connection features consistent congestion problems, and data transfers often suffer.
C. A WAN connection is rarely congested, and data transfers never suffer.
D. A WAN connection features occasional periods of congestion, and data transfers have occasionally suffered as a result.
Correct Answer: D
Section: WAN VPN Explanation

Your boss is interested in a wireless WAN solution which provides higher bandwidth than point-to-multipoint (p2mp) wireless. Which description is correct?
A. Service providers cannot install point-to-point (p2p) links from a p2mp hub.
B. P2p wireless connections can provide up to 44 Mbps raw bandwidth.
C. P2p links tend to be slower than p2mp.
D. P2mp wireless connections can provide up to 1.544 Mbps raw bandwidth.
Correct Answer: B
Section: Wireless Explanation

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