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Cisco 642-655 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Optimization Technologies and Configuration | 25% | - Application-specific acceleration: HTTP, CIFS, SSL, Video - Policy creation and classification rules - TCP optimization and flow control - DRE (Data Redundancy Elimination) and LZ compression |
| Installation and Initial Configuration | 20% | - Central Manager setup and device registration - Redirection methods configuration - Hardware and software installation - Basic network and interface configuration |
| Cisco WAAS Architecture and Components | 20% | - WAAS solution overview and benefits - Licensing and feature sets - Deployment models: In-path, WCCP, PBR, One-Arm, Two-Arm - WAE, Central Manager, and WAAS Express components |
| Monitoring, Reporting and Maintenance | 20% | - Central Manager monitoring dashboards - Software upgrades and backups - CLI commands for status and statistics - Logging, alerts and reporting |
| Troubleshooting WAAS Deployments | 15% | - Optimization failures and performance problems - Connectivity and authentication issues - Redirection issues and verification - System errors and fault isolation |
Cisco WAASFE-Wide Area Application Services for Field Engineers Sample Questions:
Your customer plans to implement Cisco WAAS using four WAE appliances in a load-balanced configuration. Which feature must be supported on the switches to which the WAE appliances are attached?
- A. Layer 2 Redirection
- B. WCCPv2
- C. Redirect exclusion
- D. WCCPv2 or PBR
Correct Answer: B 🗳️
With Cisco WAAS, which two WCCPv2 service groups are used to make up the TCP Promiscuous service group? (Choose two.)
- A. 61
- B. 89
- C. 60
- D. 62
Correct Answer: A,D 🗳️
Exhibit:
Your customer plans to deploy the edge WAE appliances in an off-path, two-arm configuration. The WAE appliances are connected to Cisco Catalyst 6500 Series Switches and use WCCPv2 for traffic interception. The customer wants to minimize the latency added by interception. The customer also wants to know if Layer 2 redirection, rather than GRE tunnels, will improve performance.
What should you tell your customer?
- A. GRE tunnels provide better performance than Layer 2 redirection
- B. Layer 2 redirection can be used only in in-path configurations
- C. Layer 2 redirection can be used in the customer configurations
- D. Layer 2 redirection can be used only in one-arm configurations
Correct Answer: C 🗳️
What is the function of Application Traffic Policies in a Cisco WAAS environment?
- A. To associate a flow with a WAE and associate the optimized flow with a device group
- B. To associate a flow with a WAN connection and associate the WAN connection with an application accelerator
- C. To associate a flow with an optimization and associate the optimized flow with an application definition
- D. To associate a flow with a Central Manager and associate the optimized flow with an application definition
Correct Answer: C 🗳️
Exhibit: The exhibit shows an entry from a TFO transaction log on the WAE. What conclusion can you draw from this result?
- A. The connection is not being optimized because the configured optimizations are not supported on the peer WAE
- B. The connection is not being optimized because the remote WAE had different TFO optimizations configured than the local WAE
- C. The connection is being optimized correctly, but no traffic has been optimized yet
- D. The connection is not being optimized because autodiscovery failed with the remote WAE
Correct Answer: D 🗳️
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