Cisco 642-825 Free Demo – 5
Posted on | January 29, 2010 | No Comments
Q21
Part of the configuration of a Exambible router is shown below:
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Based on the information above, what is needed to complete the PPPoA configuration on this Exambible router?
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A. The ATM PVC needs to be configured.
B. The VPDN group needs to be created.
C. PPPoE encapsulation needs to be configured on the ATM interface.
D. PAP authentication needs to be configured.
E. A static route to the ISP needs to be configured.
F. None of the above
Answer: A
Q22
A small Exambible office needs to connect their Cisco router to the DSL service provider. Which three configuration steps must be taken to connect a DSL ATM interface to a service provider? (Select three)
A. Configure the ATM PVC.
B. Assign a VPDN group name.
C. Configure PPPoE on the VPDN group.
D. Enable VPDN.
E. Configure the correct PPP encapsulation on the ATM virtual circuit.
F. Configure a dialer interface.
Answer: A, E, F
Q23
Router TK1 is configured as shown below:
interface ATM0/0 no ip address pvc 8/35 encapsulation aaa15mux ppp dialer dialer pool-member 1 !
interface dialer 0 ip address negotiated encapsulation ppp
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dialer pool 1 no cdp enable ppp chap hostname Exambible ppp chap password Exambible
Given the above configuration, which statement is true?
A. This device is configured as a PPPoE client.
B. This device is configured as a PPPoA client.
C. This device is configured as RFC 1483/2684 bridge.
D. This device is configured an an aggregation router.
Answer: B
Explanation:
This following is an example of configuring a Cisco router as a PPPoA client. The command “encapsulation aal5muxppp dialer” placed under the ATM interface is the indication that it is using PPPoA.
Cisco ADSL WIC !version 12.1service timestamps debug datetime msecservice timestamps datetime msec!hostname R1!ip subnet-zero!ip dhcp excluded-address 10.0.0.1!— the DHCP pool does not lease this address;!— it is used by interface FastEthernet0!ip dhcp pool poolnamenetwork 10.0.0.0 255.0.0.0 default-router 10.0.0.1!— default gateway is assigned to local devices!interface FastEthernet0 ip address 10.0.0.1 255.0.0.0 no ip directed-broadcast no ip mroute-cache!interface ATM0no ip addressno ip directed-broadcastno ip mroute-cacheno atm ilmi-keepalive pvc
1/150encapsulation aal5mux ppp dialerdialer pool-member 1
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! hold-queue 224 in!interface Dialer0ip address 172.18.0.1 255.255.0.0ip nat outsideno ip directed-broadcastencapsulation pppdialer pool 1dialer-group 2ppp pap sent-username username password password!ip nat inside source list 1 interface Dialer0 overloadip classlessip route 0.0.0.0 0.0.0.0 Dialer0no ip http server!access-list 1 permit 10.0.0.0 0.255.255.255dialer-list 2 protocol ip permit!end Reference:
http://www.cisco.com/en/US/tech/tk175/tk15/technologies_configuration_example09186a0080093e60.shtml
Q24
The configuration of the 827 ADSL router depends on tbe encapsulation method used for the ADSL connection. What are the three common encapsulation methods? (Choose three)
A. PPPoE
B. PPPoA
C. HDLC over ATM
D. DOCSIS
E. RFC 1483 Bridged
F. IP over ATM
Answer: A, B, E
Explanation:
Before you can successfully configure your Cisco DSL Router with Asymmetric Digital Subscriber Line (ADSL) service, you need specific information from your Internet Service Provider (ISP). If your ISP is unsure, unable, or unwilling to provide answers to the questions outlined below, you may not be able to correctly configure your Cisco DSL Router.
The most fundamental piece of information you will need is the type of DSL service. The following lists the type of DSL services that are available and can be configured on the Cisco 827 ADSL router:
1. Point-to-Point Protocol over Ethernet (PPPoE) 2. Point-to-Point Protocol over ATM (PPPoA) 3. RFC1483 Bridging 4. RFC1483 Routing
Q25
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Which two encapsulation methods require that an 827 ADSL router be configured with a PPP username and CHAP password? (Choose two)
A. PPPoE with the 827 configured as a bridge.
B. PPPoE with the 827 configured as the PPPoE client.
C. PPPoA
D. RFC 1483 Bridged with the 827 configured as the PPPoE client.
E. RFC 1482 Bridged with the 827 configured as a bridge.
Answer: B, C
Explanation:
When using the Point to Point Protocol over Ethernet (PPPoE) or the Point to Point Protocol over ATM (PPPoA), you must configure a PPP username and password to match the settings configured from the Internet Service Provider. This is required for both PPPoE and PPPoA in order to overcome some of the security concerns of these two Internet access methods.
Refecener: cisco CCNP CCNA CCIE
More Cisco Exam Links: 642-901 642-825 640-816
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