1Why must routers be configured to specify the ISDN switch type?*** Switches use various implementations of Q.931.The IOS of most routers lacks the ability to autosense the switch.The switch must know what type of router it is communicating with.The Layer 3 connection between the terminal equipment and the ISDN switch is not standardized. 2Which of the following is essential for all ISDN BRI interface configurations?*** ISDN switch typeline encoding techniqueline framing methodlocal directory numberservice profile identifier 3You have just taken delivery of a new US standard Cisco 2620 router that includes a BRI "U" interface? Which of the following describes how this router will be connected in the ISDN network?An external terminal adapter (TA) must be attached to the router for connectivity.An NT1 must be connected to the router for connectivity.*** The router is a TE1 device and is ready to connect to the provider's network.The router is a TE2 device and requires both a TA and NT1 for connectivity. 4What must be configured for an ISDN PRI connection? (Choose three.)*** ISDN switch typeService Profile Identifier (SPID)Dial-on-Demand Routing (DDR)*** PRI group time slot*** T1/E1 controller, framing type and line coding 5Which command configures an ISDN interface to use a switch type which is different from that used on other interfaces on the router?Router(config)#switch-type switch-typeRouter(config-if)#switch-type switch-typeRouter(config)#isdn switch-type switch-type*** Router(config-if)#isdn switch-type switch-type 6A network administrator in Europe has been asked to provide the network with an ISDN WAN link. The router available to provide the WAN connection is a non-modular Cisco router with an S/T interface. What further equipment will be provided by the ISP for the ISDN connection?Nothing. The router is already suitable.BRI WAN interface card to install in the router*** an external NT1 to terminate the local loopa TA/NT1 device to install on the router 7Which router command would be used to enter the mode for configuring a T1 PRI connection?*** Router(config)# controller t1 {slot/port}Router(config)# interface pri t1 {slot/port}Router(config)# interface pri {slot/port} t1Router(config)# controller {slot/port} t1 8A network administrator is troubleshooting an ISDN connectivity problem. Users are complaining they cannot connect to the Internet. The network administrator suspects the ISDN connection attempt is timing out before a connection can be established. What command would the network administrator use to determine what the "wait for carrier" timeout value is set to?show isdn statusshow isdn active*** show dialershow interfaces bri0/0debug isdn q931show ISDN interfaces 9What is a reason why static routes are preferred over dynamic routes for DDR to operate on an ISDN interface?An ISDN interface will not allow dynamic routing updates that use broadcast technology.A dynamic route will take precedence over a static route because of its lower administrative distance.Dynamic routing can never be considered interesting traffic by default.Dialer-list configuration does not support dynamic routing.*** Dynamic routes may cause the ISDN connection to dial constantly to transmit updates. 10Which of the following describes the use of a SPID? (Choose two.)selects the ISDN switch type*** identifies the line configuration of the BRI service*** allows multiple ISDN devices to share the local loopdesignates whether a device is a TE1 or TE2allows ISDN broadcasts 11The network administrator of XYZ company needs to configure a new ISDN router. After entering the commands shown in the graphic, the administrator tries to access the Internet but the ISDN connection does not open. If the service provider verifies that the problem is with XYZ's configuration, what is a possible cause of the problem?The dialer map is configured incorrectly.The encapsulation type is configured incorrectly.*** The dialer group is configured incorrectly.The ACL is configured incorrectly.The isdn switch-type command needs to be configured globally. 12A network administrator is troubleshooting ISDN connectivity. The administrator suspects the problem lies with the authentication protocol. What command should the administrator use to view the authentication process between the router and the ISDN switch?debug pap authenticationdebug chap authentication*** debug ppp authenticationdebug isdn authentication 13A small company uses an ISDN WAN link to transfer e-mail to remote sites. What command would the administrator use to determine if the ISDN link is up?*** show isdn statusshow isdn activeshow dialershow interface bri0/0debug isdn active 14Which of the following are true of ISDN routers configured with dialer profiles? (Choose two.)They do not use ACL to define interesting traffic.*** Their B channels can be configured with different subnets and encapsulation types.*** Their BRI interfaces can belong to multiple dialer pools.They use PPP only.They can only use the CHAP authentication protocol. 15Which of the following protocols can be used to encapsulate data traffic sent from a router BRI interface? (Choose two.)Link Access Protocol - Data*** High-Level Data Link ControlLogical Link ControlSerial Data Link Control*** Point to Point protocolBinary Synchronous Control protocol16Which of the following correctly describes ISDN BRI? (Choose three.)*** two 64 kbps B channels and one 16 kbps D channel*** B channel is suitable for voice datauses in-band signaling*** uses out-of-band signalingoffers the equivalent of a T1/E1 connectiontwenty-three 64 kbps B channels and one 16 kbps D channel 17Which of the following is considered out-of-band signaling?using a frequency outside of the rated bandwidth for transmissiontransmitting data over a control channel*** using a separate channel for control signalstransmitting control signals over a data channel 18Which command is used within an existing ISDN network to display current call information, including the called number?show isdn status*** show isdn activeshow interfaces bri0/0show ip interfaces Kaynak: Cisco Curr v3.1 belgesi-1271