Quản trị mạng Chapter4

Quản trị mạng

Dao Xuan Hung - Take Exam Exam questions 1 . Which of the following are true regarding ISDN (Integrated Services Digital Network)? Choose two. ISDN normally runs by means of a microwave network. ISDN will only permit voice and graphics to be transmitted. ISDN involves the digitization of the telephone network, which allows source material such as voice, data, video, and graphics to be transmitted over existing telephone wires. ISDN components include terminal adapters (TA), terminals, line termination equipment, network termination devices, and exchange termination equipment. 2 . What are the three complete and correct options for the “dialer map” command? A B C D E F 3 . What routing protocols are supported by Snapshot routing? IGRP OSPF EIGRP RIP BGP 4 . 13. In North America, the service provider supplies the NT1. In Europe, the customer supplies it. True False 5 . ISDN provides for what technology applications? Choose three. voice data IEEE 4.2 frame relay video 6 . Which of the following are ISDN (Integrated Services Digital Network) reference points? Choose four. W R S T U V 7 . What command would you use to apply a dialer list to an interface? dialer-list dialer-group dialer-interface dialer-apply 8 . What are the two types of ISDN (Integrated Services Digital Network) Network Termination devices? Choose two. WT1 NT2 WT0 NT1 9 . Which two commands would be useful to troubleshoot ISDN Layer 3? debug isdn q931 debug isdn network debug isdn q921 debug isdn event 10 . When a T1 link is configured for B8ZS, what is the maximum bandwidth of a DS0? 64 Kbps 33.6 Kbps 64 Mbps 56 Kbps 11 . The “S” in the ISDN “S” Reference Point stands for: Subscriber Standard Service System 12 . What are the two types of ISDN (Integrated Services Digital Network) terminals? Choose two. TE1 SE1 SE2 TE2 13 . Which one of the following ranges is the Valid Dynamic TE1 value assignment range for an ISDN BRI circuit? 1-24 25-62 64-126 128-256 14 . B8ZS (Bipolar 8 Zero Substitution) allows for: An 8-bit string of all 0’s to be replaced by a substitute byte with three bipolar violations Clear Channel Signaling Bit Surfing Data throughput of only 56 Kbps 15 . Which is the switch type for Europe? Basic-5ess Pri-5ess ISDN-3SC Basic-net3 16 . Multilink PPP (MPPP) can only be configured on individual BRI interfaces. True False 17 . Which two of the following terminals can be connected to an ISDN line? TO2 TE1 TE2/TA NU1 18 . What are Q.921 and Q.931? Choose two. Q.921 is the layer 2 framing protocol used for the D channel data Q.921 is the layer 2 framing protocol used for the B channels Q.931 is the layer 3 protocol used for the D channel Q.931 is the layer 3 protocol used for the B channels 19 . ISDN protocols that begin with "E" deal with: Choose two. International Telephone Numbering Plan International ISDN addressing Concepts, structures and terminology User Network Interface (UNI) LAPD 20 . Given the configuration: access-list 101 permit ip any any access-list 101 deny tcp any any eq ftp dialer-list 2 protocol ip list 101 Which two statements about the configuration are true with respect to FTP traffic and DDR? FTP traffic will be forwarded. FTP traffic will not be forwarded. FTP will cause the line to come up. Since FTP uses two sockets, both must be defined to prevent packet forwarding. 21 . What command would you use to show only the D channel information on the BRI 0 interface? show interface bri 0 1 2 debug bri0 debug bri 0 1 2 show interface bri 0 22 . Select the correctly matching ISDN reference points and their respective interfaces. R = Interface between TE2 and TA S = Interface between TE1 and NT2 T = Interface between NT1 and NT2 U = Interface between NT1 and ISDN network All of the above are correct 23 . On the ISDN BRI, framing and synchronization use: 8 Kbps 16 Kbps 48 Kbps 64 Kbps 24 . How many SPID’s (Service Profile Identifiers) should you have for each ISDN B channel? 1 2 3 4 25 . What is the layer 3 protocol for the D channel? Q.921 DSS1 I.430 LAPD 26 . Which of the following would be a choice regarding framing for PRI T1's? SF/ESF/CRC4 PPP/HDLC/B8ZS SLIP/PPP PAP/CHAP 27 . From the following figure, which command establishes how Router1 will call Router2? dialer map ip 10.120.1.1 name Certkiller-1 4085552222 dialer map ip 10.120.1.2 name Certkiller-1 4085551111 dialer map ip 10.120.1.2 name Certkiller-2 4085552222 dialer map ip 10.120.1.2 name Certkiller-2 4085551111 28 . When is ISDN BRI a viable option as a remote access solution to carry X.25 packets? When a mobile user needs access to the central site while traveling. When a branch office needs to connect to a mobile user. When a remote site with sporadic traffic needs to connect to a central site. When a branch office requires at least 300kbps bandwidth to the central site. Showing page 1 of 1 : 1Go! © 2004 HanoiCTT. All rights reserved. 123doc.vn