CCNP 642-821 BCMSN（建立Cisco多层交换网络）

考试时间：75分钟

及格分数：706分

CCNP 642-821 BCMSN 考点

Cisco Remote Access Networks Introduction
Specify and /or identify the Cisco products that best meet the WAN connection requirements for permanent or dialup access connections

Selecting CISCO Products for Remote Connections
Explain and/or identify the advantages and disadvantages of WAN connection types
Select the appropriate WAN connection types that address specific site connection considerations.
Select Cisco equipment that will suit the specific needs of a WAN topology

Assembling and Cabling the WAN Components
Identify the components and connections necessary to allow WAN connections like Frame Relay, and ISDN PRI from the central site to a branch office.
Identify the components and connections necessary to allow WAN connections like Frame Relay, and ISDN BRI from a branch office to the central site
Identify the components and connections necessary to allow a WAN connections like ISDN BRI from a telecommuter site to the central site

Configuring Asynchronous Connections to a Central Site with Modems
Specify the commands and procedures necessary to configure an access server for modem connectivity so telecommuters can access the central site.
Specify the commands and procedures to configure the central site for dial out connections.
Specify the commands used to reverse Telnet to the modem and configure the modem for basic asynchronous operations.
Specify the commands and procedures used to set up the modem autoconfiguration feature.

Configuring PPP and Controlling Network Access with PAP and CHAP
Specify the commands and syntax used to configure a PPP connection between the central site and a branch office
Specify the commands and syntax to configure PAP or CHAP authentication to allow access to a secure site.
Configure Multilink PPP to increase the data throughput.
Specify the commands used to verify proper PPP configuration and troubleshoot an incorrect PPP configuration.
Accessing the Central Site with Windows 95
Specify the commands and procedures to configure a PC to complete a dialup call to the central site router through the traditional telephone network.

Using ISDN and DDR Technologies to Enhance Remote Connectivity
Identify when to use ISDN BRI and PRI services and select the service that best suits a set of given requirements.
Identify the Q.921 and Q.931 signaling and call setup sequences.
Specify the commands used to configure ISDN BRI and PRI
Specify the commands used to configure DDR

Optimizing the use of DDR Interfaces
Specify or select appropriate dialup capabilities to place a call.
Specify the commands and procedures to configure rotary groups and dialer profiles
Specify the commands used to verify proper dialer profile or rotary group configuration and troubleshoot an incorrect configuration.

Using X.25 for Remote Access
Specify the commands and procedures to configure an X.25 WAN connection between the central office and branch office
Specify proper X.121 addresses and the commands used to assign them to router interfaces
Specify the commands and procedures used to verify proper X.25 configuration and troubleshoot incorrect X.25 configuration

Establishing a Dedicated Frame Relay Connection and Control Traffic Flow
Specify the commands and procedures used to configure a Frame Relay WAN connection between the central office and branch office
Specify the commands to configure subinterfaces on virtual interfaces to solve split horizon problems.
Specify the commands used to configure Frame Relay traffic shaping.
Specify the commands and procedures used to verify proper Frame Relay configuration and troubleshoot an incorrect configuration

Enabling a Backup to the Permanent Connection
Specify the procedure and commands used to configure a backup connection that activates upon primary line failure.
Specify the procedure and commands used to configure a backup connection to activate when the primary line reaches a specified threshold.
Specify the procedure and commands used to configure a dialer to function as backup to the primary interface.

Managing Network Performance with Queuing and Compression
Determine why queuing is enabled, identify alternative queuing protocols that Cisco products support, and determine the best queuing method to implement.
Specify the commands to configure weighted-fair, priority and custom queuing
Specify the commands and procedures used to verify proper queuing configuration and troubleshoot incorrect configuration
Specify the commands and procedures used to effectively select and implement compression

Scaling IP Addresses with Network Address Translation
Describe how NAT and PAT operate.
Specify the commands and procedures to configure NAT and PAT to allow reuse of registered IP addresses in a private network.
Verify proper configuration of NAT and PAT with available Cisco verification commands.

Using AAA to Scale Access Control in an Expanding Network
Specify, recognize or describe the security features of CiscoSecure and the operation of a CiscoSecure server.
Specify the commands and procedures used to configure a router to access a CiscoSecure server and to use AAA.
Specify the commands used to configure AAA on a router to control access from remote access clients.