When using IP 

第1题：

What is the purpose using the traceroute command?（）

• A、to map all the devices on a network.
• B、to display the current TCP/IP configuration values.
• C、to see how a device MAC address is mapped to its IP address.
• D、to see the path a packet will take when traveling to a specified destination.
• E、to display the MTU values for each router in a specified network path from source to a destination.

第2题：

When building an IP multicast domain using PIM which mode assumes  that other routers do not want to forward multicast packets for the group?（）

• A、PIM - DM
• B、PIM - SM
• C、PIM - RP
• D、CGMP
• E、IGMP snooping

第3题：

第4题：

A small office in which all workstations are using an ISP provided IP range has noticed a consistent decrease in network traffic speed. The decrease does not occur when the gateway to the ISP is disconnected. Which of the following should the administrator implement?（）

• A、Multicast addressing
• B、Load balancing
• C、Address translation
• D、DHCP

第5题：

When configuring a wlan controller for a voice application using cisco 7920 wireless ip phones. which two general control settings should you select？（）

• A、multicast on
• B、aggressive load balancing off
• C、multicast off
• D、ap fallback on
• E、aggressive load balancing on
• F、ap fallback off

第6题：

When you enter the interface command auto qos voip cisco-phone on a port at the edge of a network,how does the Cisco Catalyst switch detect if a Cisco IP Phone is connected to the port?（）

• A、by snooping the CoS marking on the incoming frames
• B、by using RTP hello messages between the switch port and the Cisco IP Phone
• C、by using CDP
• D、by using DHCP snooping
• E、by snooping the incoming 802.1Q VLAN tag

第7题：

You need to configure a GRE tunnel on a IPSec router. When you are using the SDM to configurea GRE tunnel over IPsec， which two parameters are required when defining the tunnel interfaceinformation？（）

• A、The crypto ACL number
• B、The IPSEC mode （tunnel or transport）
• C、The GRE tunnel interface IP address
• D、The GRE tunnel source interface or IP address， and tunnel destination IP address
• E、The MTU size of the GRE tunnel interface

第8题：

The Cisco Smart Business Communications System offers support of third-party applications. When using TimeCard View， what device is used by employees to clock in and clock out？（）  

• A、 IP phone
• B、 wireless access point
• C、 secure router
• D、 time clock

第9题：

In a Teleworker deployment with a single IP phone connected to a Cisco 831 router, select the true statement regarding Call Admission Control.（）

• A、RSVP is a required configuration to support conference calls without voice packet loss. 
• B、The QoS configuration on the 831 router must always provision sufficient bandwidth for two RTP streams. 
• C、Call admission control is an issue only when using hardware DSP resources. 
• D、When using the conference call features on a 7960 IP phone, only one RTP stream is present regardless of how many extensions are on the conference.

第10题：

A cluster using IPAT via IP aliasing has four adapters. Normally there are several resource  groups that have a total of four service IP labels. When two of the adapters fail， what happens？（）  

• A、 The resource group containing the IP labels changes to an "offline" state.
• B、 The IP service labels of the failed adapters relocate the surviving adapters.
• C、 Nothing because the resource groups wait for the adapters to become active again.
• D、 The resource groups containing the IP labels of the failed adapters migrate to a backup node.