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61.
You need to configure a router for a Frame Relay connection to a non-Cisco router. Which of the following commands will prepare the WAN interface of the router for this connection?
  • A.
    Router(config-if)#encapsulation frame-relay q933a
  • B.
    Router(config-if)#encapsulation frame-relay ansi
  • C.
    Router(config-if)#encapsulation frame-relay ietf
  • D.
    Router(config-if)#encapsulation frame-relay cisco
  • Answer & Explanation
  • Report
Answer : [C]
Explanation :
If you have a Cisco router on one side of a Frame Relay network and a non-Cisco router on the other side, you would need to use the Frame Relay encapsulation type of IETF. The default is Cisco encapsulation, which means that a Cisco router must be on both sides of the Frame Relay network.
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62.
The Acme Corporation is implementing dial-up services to enable remote-office employees to connect to the local network. The company uses multiple routed protocols, needs authentication of users connecting to the network, and since some calls will be long distance, needs callback support. Which of the following protocols is the best choice for these remote services?
  • A.
    802.1
  • C.
    HDLC
  • E.
    PAP
  • B.
    Frame Relay
  • D.
    PPP
  • Answer & Explanation
  • Report
Answer : [D]
Explanation :
PPP is your only option, as HDLC and Frame Relay do not support these types of business requirements. PPP provides dynamic addressing, authentication using PAP or CHAP, and callback services.
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63.
Which WAN encapsulations can be configured on an asynchronous serial connection? (Choose two.)
  • A.
    PPP
  • C.
    HDLC
  • E.
    Frame Relay
  • B.
    ATM
  • D.
    SDLC
  • Answer & Explanation
  • Report
Answer : [A, B]
Explanation :
Please do not freak out because ATM is an answer to this question. ATM is not covered in depth on the CCNA exam. PPP is mostly used for dial-up (async) services, but ATM could be used as well, though it typically is not used anymore since PPP is so efficient.
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64.
Which of the following uses ATM as the Data Link layer protocol that's terminated at what's known as the DSLAM?
  • A.
    DSL
  • C.
    Frame Relay
  • E.
    Wireless
  • B.
    PPPoE
  • D.
    Dedicated T1
  • F.
    POTS
  • Answer & Explanation
  • Report
Answer : [A]
Explanation :
ATM is the Data-Link layer protocol that's typically used over the DSL layer 1 connection from the CPE and terminated at what's known as the DSLAM—an ATM switch that contains DSL interface cards, or ATU-Cs.
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65.
Why won't the serial link between the Corp router and the Remote router come up?
Corp#sh int s0/0
Serial0/0 is up, line protocol is down
Hardware is PowerQUICC Serial
Internet address is 10.0.1.1/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 254/255, txload 1/255, rxload 1/255

Remote#sh int s0/0
Serial0/0 is up, line protocol is down
Hardware is PowerQUICC Serial
Internet address is 10.0.1.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 254/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
  
  • A.
    The serial cable is faulty.
  • B.
    The IP addresses are not in the same subnet.
  • C.
    The subnet masks are not correct.
  • D.
    The keepalive settings are not correct.
  • E.
    The layer 2 frame types are not compatible.
  • Answer & Explanation
  • Report
Answer : [E]
Explanation :
This is an easy question because the Remote router is using the default HDLC serial encapsulation and the Corp router is using the PPP serial encapsulation. You should go to the Remote router and set that encapsulation to PPP or change the Corp router back to the default of HDLC.
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