单选题The LAN-side of the Teleworker router is assigned private IP address space (RFC1918), and the VPN topology is IPSec-only (no GRE protocol). When is it required to configure NAT/pNAT on the Teleworker router?（）A when all access to the Internet is throug

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第2题：

Easy VPN operates in two modes. Although Client Mode has advantages, there are environments where it should not be used.（）

• A、Teleworker devices must be accessed from the central site (server, printers).
• B、IP addressing is simplified.
• C、The Teleworker LAN is a transit networking for routing.
• D、An Enterprise application does not function with Network Address Translation.
• E、The Teleworker router is an MPLS PE node.

第3题：

In which of the following scenarios would the "show cdp neighbors detail"command be an appropriate troubleshooting tool?（）

• A、Two switches are connected via a trunk. Both switches have been assigned an IP address, subnet mask, and default gateway. A ping is successful between the two switches. However, VLAN information is not passed from one switch to the other switch.
• B、A router and a switch have been assigned an IP address, a subnet mask, and a default gateway. They are directly connected, but a ping between the two devices fails.
• C、A router connects to another router through a serial interface. Both routers have been assigned an IP address, subnet mask, and default gateway. The routers are running RIP and the networks directly connected to the first router do not pass to the second router. However, a ping from one router to the serial interface of the directly connected neighboring router is successful.
• D、A router connects to another router via a switch. Both routers and the switch have been assigned an IP address, subnet mask, and default gateway. Neither the routers nor the switch are able to ping one of the hosts that is directly to the switch.

第4题：

What is a method by which an IP interface can be assigned to a virtual router in a PPP over ATM environment?（）

• A、policy list
• B、RADIUS VSA
• C、classifier ACL
• D、LCP negotiation

第5题：

What will happen if a private IP address is assigned to a public interface connected to an ISP?（）

• A、Addresses in a private range will be not routed on the Internet backbone.
• B、Only the ISP router will have the capability to access the public network.
• C、The NAT process will be used to translate this address in a valid IP address.
• D、Several automated methods will be necessary on the private network.
• E、A conflict of IP addresses happens, because other public routers can use the same range.

第6题：

Which three options are supported as address allocation mechanisms for DHCP on Cisco routers?（）

• A、The IP address can be automatically assigned to a host.
• B、The IP address can be assigned as a random hash value of the burned - in - address of the lowest - numbered LAN interface on the router.
• C、The network administrator can assign a speci fic IP address to a specific host MAC address.
• D、The IP address can be assigned from configured pools in a reverse lexicographical order.
• E、The IP address can be assigned to a host for a limited time or until the host explicitly releases the address.
• F、The IP address can be assigned to a host until the host usurps the assigned value using its own dynamic override mechanism.

第7题：

Which of the following features on a wireless router maps the private IP address to a public IPaddress?（）

• A、SSID
• B、NAT
• C、MAC filtering
• D、DHCP

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A customer wants to TFTP a new image from the corporate network to Flash on the Teleworker router through the IPSec tunnel. How should you configure the Teleworker router?（）

• A、No additional steps are required. 
• B、Add the appropriate source-interface command. 
• C、The router cannot access a server in the Enterprise Campus network. 
• D、The Teleworker Router does not have any client applications; therefore this type of request is not possible.

第14题：

What does the "Inside Global" address represent in the configuration of NAT?（）

• A、the summarized address for all of the internal subnetted addresses
• B、the MAC address of the router used by inside hosts to connect to the Internet
• C、a globally unique， private IP address assigned to a host on the inside network
• D、a registered address that represents an inside host to an outside network

第15题：

In a PPP over ATM service offering, what is a valid method for assigning an address to the ERX Edge Router?（）

• A、DHCP assigned addresses
• B、RADIUS assigned addresses
• C、IP numbered with a loopback reference
• D、IP unnumbered with a loopback reference

第16题：

You have a Bridged 1483 service offering where each ATM PVC is assigned a /30 subnet. What are two characteristics of this configuration？（）

• A、It burns IP addresses.
• B、It conserves IP addresses.
• C、Both the client and the ERX Edge Router have IP addresses.
• D、The client has an IP address， but the ERX Edge Router uses an unnumbered address.

第17题：

When is it necessary to use a public IP address on a routing interface?（）

• A、Connect a router on a local network.
• B、Connect a router to another router.
• C、Allow distribution of routes between networks.
• D、Translate a private IP address.
• E、Connect a network to the Internet.

第18题：

In order for computers with private IP addresses to access the public Internet, which of thefollowing must the router perform?（）

• A、NAT
• B、BGP
• C、DHCP
• D、APIPA

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