ISDN

QUESTION 1

You are a systems administrator of an HR company in Dallas. You want to connectyour company's head office with a branch office in Detroit. To do this, you want touse two data link layer encapsulations: one exclusively for data and the otherexclusively for signaling. Which one of the following WAN services would best suityour needs?A. ISDNB. ATMC. FDDID. ATXE. Frame Relay

QUESTION 2

Study the information and the relevant configuration file below for the CertkillerBranch router.Hostname: BranchPH# 123-6000, 123-6001SPID1: 32055512360001SPID2: 32055512360002isdn switch-type basic-ni1username Remote password ciscointerface bri0ip address 10.1.1.1 255.255.255.0encapsulation pppppp authentication chapisdn spid1 32055512360001isdn spid2 32055512360002dialer map ip 10.1.1.2 name Remote 1238001dialer-list 1 protocol ip permitWhat additional command must be executed on the Branch router beforeinteresting traffic will initiate an ISDN call?A. (config-if)# dialer-group 1B. (config-if)# dialer-list 1C. (config-if)# dialer map 1D. (config-if)# dialer-route 1

QUESTION 3

The Certkiller Network is using ISDN to provide connectivity between Certkiller 1and Certkiller 2 as shown below:

Assuming that the ISDN switch doesn't require SPIDs, which of the followingcommands would you implement to bring up the ISDN connection and provideconnectivity between the two routers? (Select three answer choices)A. Router(config-if)# encapsulation HDLCB. Router(config)# dialer-list 1 protocol ip permitC. Router(config)# isdn switch-type typeD. Router(config)# dialer map ip address name connection numberE. Router(config-if)# dialer-group 1F. Router(config-if)# ip address address subnet mask

QUESTION 4

Your goal is to illustrate the five necessary steps of configuring dial-on-demanrouting (DDR) on an ISDN BRI. Place the parameters on the right to the proper sloton the left. (Note: not all the parameters will be used)

QUESTION 5

You have just obtained a modular Cisco router with 2 serial connections and aBRI/U interface. What other physical piece of hardware is required in order toestablish an ISDN connection?

A. Nothing. The router is already suitable.B. A BRI WAN interface in the router.C. An external NT1 to terminate the local loop.D. A TA/NT1 device on the router.

QUESTION 6

An ISDN link can be encapsulated using either PPP or HDLC. What are theadvantages of using PPP? (Select two answer choices)

A. PPP is easier to configure and maintain than HDLC.B. PPP is consistently implemented among different equipment vendors.C. PPP will run faster and more efficiently than HDLC on circuit-switched ISDNlinks.D. PPP authentication will prevent unauthorized callers from establishing an ISDNcircuit.E. PPP can be routed across public facilities, while HDLC is not routable in circuitswitchednetworks.F. PPP supports asynchronous communication.

QUESTION 7

In the context of configuring dial-on-demand routing using ISDN, what is thepurpose of the dialer-list command?A. to identify valid numbers for incoming callsB. to define the type of ISDN switch at the central officeC. to specify the list of outgoing phone numbers used by the routerD. to associate a dial configuration with a physical interfaceE. to define interesting traffic that will enable the link

QUESTION 8

You are attempting to troubleshoot some problems within your local network.Which of the following are router IOS commands that can be used to troubleshootLAN connectivity problems? (Choose all that apply)A. pingB. tracertC. ipconfigD. show ip routeE. winipcfgF. show interfacesG. All of the above

QUESTION 9

Which WAN service utilizes two different encapsulation types (one for data and onefor signaling) on its data link layer?

A. ISDNB. Frame RelayC. ATMD. FDDI

QUESTION 10

Which one of the WAN data-link protocols below is used for out-of-band signaling?

A. HDLCB. NCPC. PAPD. LAPDE. LAPB

QUESTION 11

Which WAN technology was designed to give homes and small business high speeddigital dial-up service over already existing communication infrastructure?

A. X25B. Frame RelayC. ATMD. ISDNE. ATX

QUESTION 12

A new asynchronous connection is being installed in your network. Which pair ofWAN encapsulations types is suitable for asynchronous lines?

A. PPP and ATMB. PPP and SDLCC. ATM and HDLCD. SDLC and HDLC

QUESTION 13

Classify the ISDN terms on the right hand side to their corresponding descriptionon the left side. (Not all the options on the left will be used)

QUESTION 14

You have a single ISDN BRI B channel. What is its maximum bandwidth capacityof this one channel?A. 16kb/s

B. 64kb/sC. 128kb/sD. 144kb/sE. 192kb/sF. 256kb/s

QUESTION 15

Which of the following are correct regarding ISDN? (Select all that apply)A. Legacy DDR can use port information to define interesting traffic.B. Legacy DDR can configure multiple dialer configurations on the same interface.C. Legacy DDR can use ACLs to define interesting traffic.D. HDLC or PPP can be used to encapsulate ISDN D channel information.E. The BRI interfaces on ISDN routers with dialer profiles configured cannot belongto multiple dialer pools.F. Dialer profiles cannot use extended ACLs to define interesting traffic.

QUESTION 16

Which of the following statements regarding ISDN are correct? (Select all thatapply)A. Each ISDN B channel has transmission speeds of up to 64 kbps.B. The ISDN B channel can carry video, voice or data.C. The ISDN B channel transmission rate varies depending on the service used.D. The ISDN D channel transmits control information.E. The ISDN B channels can be configured with different subnets and encapsulationtypes when dialer profiles are configured.

QUESTION 17

Which WAN protocol is used for out-of-band signaling?

A. NCPB. HDLCC. LAPBD. LAPD

QUESTION 18

Which ISDN device converts the four-wire BRI signals from an S/T interface intothe two-wire signals of a U interface?A. TE1B. NT-2C. TAD. TE2E. NT-1

QUESTION 19

Which statements are true regarding ISDN channels? Select threeA. Each B channel can transmit up to 64 kbpsB. The ISDN B channel carries voice or dataC. the ISDN D channel transmits control information.D. The D channel transmission rate varies depending on the service used.E. HDLC or PPP can be used to encapsulate D channel information.

QUESTION 20

Which device enables a router serial interface to connect to the ISDN BRI?A. NT2B. NT1C. TED. TAE. TE1