module2 (1130938)
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http://ccna-4.blogspot.comhttp://360.yahoo.com/quocvuong_itTake Assessment - EWAN Chapter 2 - CCNA Exploration: Accessing the WAN(Version 4.0) -75.6%1Which authentication protocol can be spoofed to allow playback attacks?MD5CHAPPAPNCP2Refer to the exhibit. Which two statements are true about this configuration? (Choose two.)Authentication will fail between these routers.Each router authenticates its neighbor against the username and password that are configured inthe local database.The default encapsulation type is configured on these routers.NCP negotiates for IP to use predictor compression.If there is more than a 20% error rate on the line, then LCP will take the line down.3Which two options can LCP negotiate? (Choose two.)link qualityauthenticationdynamic flow controlcompression and network layer address for IPhttp://ccna-4.blogspot.comhttp://360.yahoo.com/quocvuong_itconnection-oriented or connectionless communication methods4Which statement describes parallel data communications?Digital data is broken into 8-bit chunks (bytes) and transmitted from one entity to another bit by bit.Digital data that is transmitted over a parallel connection is not affected by clock skew or crosstalk.Digital data is transmitted from one entity to another via the use of a bus that consists of multipwires, each carrying one bit of the data sample.Digital data is transmitted via the use of two loops of wire, one in each direction.5Refer to the exhibit.
On the basis of the show interface Serial0/0/0 output, how many NCP sessions haveestablished?onetwothreefour6Which serial communications DTE/DCE interface standard is used to provide high-speed connectivity of52 Mbps between LANs and is found on many high-end Cisco routers?EIA/TIA 232 (RS-232)ITU V.35HSSIEIA/TIA 422 (RS-422)EIA/TIA 423 (RS-423)http://ccna-4.blogspot.comhttp://360.yahoo.com/quocvuong_it7Which three statements are correct about HDLC encapsulation? (Choose three.)HDLC supports PAP and CHAP authentication.-pppHDLC implementation in Cisco routers is proprietary.HDLC specifies a data encapsulation method on synchronous serial links using frame charactechecksumsHDLC is the default serial interface encapsulation on Cisco routers.HDLC and PPP are compatible.HDLC does not support CDP.8Which three statements correctly describe PPP authentication? (Choose three.)PAP sends passwords in clear text.PAP uses a 3-way handshake to establish a link.PAP provides protection from repeated trial-and-error attacks.CHAP uses a 2-way handshake to establish a link.CHAP uses a challenge/response that is based on the MD5 hash algorithm.CHAP uses repeated challenges for verification.9Refer to the exhibit.
Which two items were negotiated during the PPP session shown in the debugoutput? (Choose two.)Challenge Handshake Authentication ProtocolPassword Authentication Protocolcompressionlink qualityerror detection10 Which three statements are true regarding LCP? (Choose three.)http://ccna-4.blogspot.comhttp://360.yahoo.com/quocvuong_itIt is responsible for negotiating link establishment.It negotiates options for Layer 3 protocols running over PPP.It uses MD5 encryption while negotiating link establishment parameters.It terminates the link upon user request or the expiration of an inactivity timer.It can test the link to determine if link quality is sufficient to bring up the link.It monitors the link for congestion and dynamically adjusts the acceptable window size.11Refer to the exhibit.
What statement is true regarding the output shown?LCP is in the process of negotiating a link.LCP and NCP are waiting for CHAP authentication to complete.LCP negotiation has been successful, but NCP negotiation is in progress.Data is able to flow across this link.What does the demarcation point represent in data communication physical circuits?DTE/DCE interface on the device connecting to the Internetlocation of the firewall or router12physical point at which the public network ends and the private customer network beginstag assigned to the physical block where a cross-connect occursWhich two statements are true regarding time-division multiplexing (TDM)? (Choose two.)It allows information from multiple channels to be allocated bandwidth on a multiple wires.13Multiple sources can transmit over a single channel.Original data streams must be reconstructed at the destination.TDM relies on Layer 3 protocols to operate.TDM methods vary depending on the Layer 2 protocol used.-14http://ccna-4.blogspot.comhttp://360.yahoo.com/quocvuong_itRefer to the exhibit.
What statement is true regarding the output shown?NCP has successfully negotiated.The PAP passwords did not match, so the routers are trying CHAP authentication.One router has suggested PAP authentication, and the other has accepted authentication butsuggested CHAP authentication.One router can only use PAP authentication while the other router can only use CHAP, so the connhas been rejected.15Refer to the exhibit. Which two statements are true regarding the output shown? (Choose two.)LCP negotiation has been successful.The router has agreed on IP parameters.The router is negotiating IP compression options.The router is requesting an IP address from its peer.The router has accepted IP but not the suggested IP options.What function do Network Control Protocols provide for a PPP connection?to establish and terminate data linkserror detectionto manage network congestion and to allow quality testing of the link16to allow multiple Layer 3 protocols to operate over the same physical linkto provide authentication capabilities to PPP17http://ccna-4.blogspot.comhttp://360.yahoo.com/quocvuong_itRefer to the exhibit.
Which series of statements accurately describes the PPP link establishmentprocess for these routers?LCP negotiates the authentication optionLCP tests link qualityPAP authenticationNCP negotiates Layer 3 protocol optionsLCP negotiates the compression and authentication optionsLCP tests link qualityCHAP authenticationNCP negotiates Layer 3 protocol optionsLCP tests the link qualityLCP negotiates compression and authentication optionsCHAP authenticationNCP negotiates Layer 3 protocol optionsCHAP authenticationLCP tests link qualityLCP negotiates compression optionsNCP negotiates Layer 3 protocol optionsLCP negotiates the compression and authentication optionsNCP negotiates Layer 3 protocol optionsLCP tests link qualityCHAP authentication18What is the reason why parallel data communications is not feasible over long transmission lengths?crosstalk between wires and clock skewhttp://ccna-4.blogspot.comhttp://360.yahoo.com/quocvuong_iterror checking not possibletransmission rate is too lowtoo much attenuation19Which advantage does the multilink option provide when using PPP?Data transmission has load balancing possibilities.Interfaces can be configured using both HDLC and PPP.More than one authentication method can be used.More than one compression protocol can be configured.20 What would show interface s0/0/0 indicate if show controllers s0/0/0 indicated a cable type ofunknown?serial 0/0/0 is down, line protocol is downserial 0/0/0 is up, line protocol is downserial 0/0/0 is up, line protocol is up (looped)serial 0/0/0 is up, line protocol is down (disabled)serial 0/0/0 is administratively down, line protocol is down21Refer to the exhibit.
According to the the provided router output, which statement is truehttp://ccna-4.blogspot.comhttp://360.yahoo.com/quocvuong_itregarding PPP operation?Only the link-establishment phase completed successfully.Only the network-layer phase completed successfully.Neither the link-establishment phase nor the the network-layer phase completedsuccessfully.Both the link-establishment and network-layer phase completed successfully..
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