Chapter 10. ISDN

1:	What is the data transfer rate for an ISDN bearer channel? A. 12Kbps B. 16Kbps C. 56Kbps D. 64Kbps E. 128Kbps
2:	What is the data transfer rate for a BRI ISDN delta channel? A. 12Kbps B. 16Kbps C. 56Kbps D. 64Kbps E. 128Kbps
3:	Which protocol recommends telephone network standards for ISDN? A. A-series B. E-series C. I-series D. Q-series
4:	Which protocol deals with concepts, terminology, and methods? A. A-series B. E-series C. I-series D. Q-series
5:	Which protocol covers switching and signaling in ISDN? A. A-series B. E-series C. I-series D. Q-series
6:	How many bearer channels are provided in BRI? A. 1 B. 2 C. 16 D. 23
7:	How many bearer channels are provided in PRI for North America? A. 1 B. 2 C. 16 D. 23
8:	What is the data transfer rate for a PRI ISDN delta channel? A. 12Kbps B. 16Kbps C. 56Kbps D. 64Kbps E. 128Kbps
9:	How many bearer channels are provided in PRI for Europe? A. 16 B. 24 C. 30 D. 32
10:	Which channel provides setup, signaling, and termination in ISDN? A. B channel B. D channel C. S channel D. T channel
11:	Which channel in ISDN is used for the transfer of data and the bulk of network traffic? A. B channel B. D channel C. S channel D. T channel
12:	Which of the following designates a router or ISDN telephone as a device having a native ISDN interface? A. TE1 B. NT-2 C. NT-1 D. TE2 E. TA
13:	Which of the following is the point at which all ISDN lines at a customer site are aggregated and switched using a customer-switching device? A. TE1 B. NT-2 C. NT-1 D. TE2 E. TA
14:	Which of the following converts the four-wire BRI signals from an S/T interface into two-wire signals of a U interface? A. TE1 B. NT-2 C. NT-1 D. TE2 E. TA
15:	Which of the following designates a device such as a PC or router requiring a TA to adapt communication for BRI signals? A. TE1 B. NT-2 C. NT-1 D. TE2
16:	Which of the following converts EIA/TIA-232, V.35, and other signals into BRI signals? A. TE1 B. NT-2 C. NT-1 D. TE2 E. TA
17:	Which of the following reference points refers to the connection between a non–ISDN-compatible device and a terminal adapter? A. R B. S C. T D. U
18:	Which of the following reference points refers to the point that connects into the NT-2, or customer-switching device? A. R B. S C. T D. U
19:	Which of the following reference points refers to the outbound connection from the NT-2 to the ISDN network? A. R B. S C. T D. U
20:	Which of the following reference points refers to the connection between the NT-1 and the ISDN network owned by the telephone company? A. R B. S C. T D. U
21:	Which of the following components is supplied by the end user in the United States and by the provider in Europe? A. TE1 B. NT-2 C. NT-1 D. TE2 E. TA
22:	Which of the following designations indicates that the NT-1 is built in? A. TE1 B. NT-2 C. S/T D. U E. TA
23:	Which of the following is a series of characters that identifies you to the switch at the central office? A. UID B. SID C. SPID D. Terminal ID
24:	You need to specify the type of ISDN switch you are using to configure ISDN BRI. You are using a National ISDN-1. Which command is correct? A. switch-type ni1 B. switch-type basic-ni1 C. isdn switch-type ni1 D. isdn switch-type basic-ni1
25:	You have configured the switch type; however, your ISDN BRI connection is not working. What else should you do? A. Re-enter the switch type. B. Reload the router configuration. C. Restart the router. D. Flush NVRAM.
26:	You've set the switch type to AT&T 5ESS for your BRI connection. Your provider has given you your SPID. What is your next step? A. Configure only the SPID on the first B channel. B. Configure only the SPID on the second B channel. C. Configure the SPID on both B channels. D. Configure the SPID on neither B channel.
27:	You need to configure the SPID for your router. What command is appropriate? A. isdn spid1 spid-number B. isdn spid spid-number C. spid spid-number D. spid1 spid-number
28:	You are reviewing your device's current configuration. You notice that you have configured different switch type settings for your switch in both Global Configuration mode and Interface Configuration mode. What is the effective switch type? A. The global setting overrides all settings. B. The interface setting overrides the global setting for that interface. C. Neither setting takes effect. D. This configuration cannot be created.
29:	You have a T1 interface that needs to have ISDN PRI configured on all 24 channels. After you set the switch type and controller, what command should you enter next? A. pri-group timeslots 1-24 B. pri-group timeslots 0-23 C. timeslots 0-23 D. timeslots 1-24
30:	You type the following configuration into a router: access-list 110 permit tcp any any eq www dialer-list 1 protocol ip list 110 isdn switch-type basic-5ess interface bri0 ip address 10.0.0.1 255.0.0.0 dialer-group 1 dialer map ip 10.0.0.2 5551111 isdn spid1 55511110101 5551111 Next, you test the ISDN connection by attempting to send HTTP traffic. The line comes up successfully, and the HTTP traffic is transmitted across the ISDN connection. You then send SMTP traffic and notice that SMTP traffic is also being permitted. Why is SMTP traffic going across the ISDN connection? A. The access list is configured wrong. B. The dialer list is not applied correctly. C. The dialer-list command specifies only what traffic brings up the ISDN connection, not what traffic is allowed across after the connection is up. D. SMTP traffic is a subset of HTTP; therefore, it is allowed across the ISDN connection.
31:	You want to display statistics for the BRI interface configured on the router. What command should you enter? A. show isdn statistics B. show isdn bri C. show interfaces bri0 D. show isdn status
32:	You want to ensure the router is communicating properly with the switch by viewing the status of both Layer 1 and Layer 2, as well as by viewing the number of active calls. What command permits this? A. show isdn layers B. display isdn layers C. show isdn status D. show isdn info
33:	You need to examine Layer 2 messages regarding the D channel. Which command displays this information? A. debug isdn q921 B. debug show isdn C. show isdn layer2 D. show isdn q921
34:	You need to view Layer 3 messages regarding the setup and teardown of the ISDN network connection. Which command is appropriate? A. show isdn q931 B. show isdn layer3 C. debug isdn q931 D. debug isdn layer3
35:	You want to view CHAP and PAP information for your ISDN connection. Which command shows you the packet exchange information? A. debug isdn authentication B. debug ppp authentication C. debug authentication D. show isdn ppp
36:	You enter the following configuration into a router, but when you test it, you are unable to initiate the ISDN call. What is wrong? Router#config terminal Router(config)#hostname Arizona Arizona(config)#router rip Arizona(config-router)#network 10.0.0.0 Arizona(config-router)#network 192.168.200.0 Arizona(config-router)#version 2 Arizona(config-router)# no auto-summary Arizona(config-router)#passive-interface default Arizona(config-router)# no passive-interface eth0 Arizona(config-router)#exit Arizona(config)#interface ethernet0 Arizona(config-if)#ip address 10.0.0.1 255.0.0.0 Arizona(config-if)#interface bri0 Arizona(config-if)#ip address 192.168.200.93 255.255.255.252 Arizona(config-if)#encapsulation ppp Arizona(config-if)#ppp authentication chap Arizona(config-if)#dialer map ip 192.168.200.94 name Indiana 5553333 Arizona(config-if)# isdn spid1 55511110101 5551111 Arizona(config-if)#isdn spid2 55522220101 5552222 Arizona(config-if)# dialer-group 40 Arizona(config-if)#dialer idle-timeout 30 Arizona(config-if)#isdn switch-type basic-ni Arizona(config-if)#exit Arizona(config)#ip route 192.168.200.96 255.255.255.224 192.168.200.94 Arizona(config)#dialer-list 4 protocol ip permit Arizona(config)#username Indiana password sanjose A. The dialer group is applied wrong. B. The RIP configuration is wrong. C. The PPP authentication is configured wrong. D. The dialer map is configured wrong. E. The configuration is incomplete.
37:	You want to monitor PPP traffic and exchanges, including Link Control Protocol and Network Control Protocol. What command shows this information? A. debug ppp traffic B. show ppp traffic C. debug ppp negotiation D. show ppp negotiation
38:	Dial-on-demand routing (DDR) is designed for which of the following types of connections? A. Low-volume periodic connections B. High-volume periodic connections C. Low-volume persistent connections D. High-volume persistent connections
39:	In DDR operation, what is "interesting traffic"? A. Traffic signaling a possible attack B. Traffic that should be blocked C. Traffic that should initiate the connection D. Traffic that initiates from the router
40:	Which command allows you to specify interesting traffic for DDR? A. dialer-list B. accesslist C. dial list D. dial-list
41:	What command associates a port with a dial list? A. dialer-group B. dial port C. dialer port D. dialer-port
42:	What command associates a dialer string with a dial list? A. dialer-map B. dialer-list C. dial map D. dial list
43:	What three things are necessary to complete a DDR ISDN call? (Choose three.) A. Static routes B. Dialer information C. Interesting traffic D. Routing protocols E. SPID numbers F. DLCIs
44:	You've configured static routes for use with your DDR connection. You want to review the routes the router is using. What command displays these routes? A. show ip static B. show ip route C. show route D. show route static
45:	What BRI command displays statistics for the ISDN DDR call, including the source and destination information for the packet initiating the call? A. show ddr B. show dialer interface bri0 C. show dialer interface D. show interface bri0
46:	Which command allows you to receive debugging information about the packets received on a dialer interface? A. debug packets B. debug dialer C. debug interface D. debug dialer interface
47:	You need to disable the interface. Disconnecting any call in progress is acceptable. What command should you issue? A. no isdn B. shutdown isdn C. disable isdn D. shutdown
48:	You need to configure the line to disconnect if it has been idle for two minutes. What command should you use? A. dialer timeout 120 B. dialer idle-timeout 120 C. dialer idle 120 D. dialer line idle 120
49:	You have set the dialer load threshold value to 25. What is the minimum percentage load that will cause the line to initiate another call to the destination? A. 2.5% B. 10% C. 25% D. 100%
50:	Which of the following types of traffic are acceptable for ISDN BRI bearer channels? (Choose three.) A. Voice B. Data C. Signaling D. Acknowledgments E. Video