Quản trị mạng Chapter2

Quản trị mạng

Phung Manh Duc - Take Exam

Exam questions

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1 What is the defined standard for the DCE/DTE interface?

RS-232-C

EIA/TIA-232

IETF DCE/DTE interface specification

RFC 232

2 Which of the following are true? Choose two

DTE = Data Terminal Equipment(PC’s, workstations, Mainframes)

DCE = Data Communications Equipment(PC’s, workstations,Mainframes)

DCE = Data Communications Equipment(modems, CSU/DSU’s)

DTE = Data Terminal Equipment(modems, CSU/DSU’s)

3 With asynchronous communication, which three of the eight pins in a DB25 connector are used to handle modem control? Choose three

Pin 2

Pin 3

Pin 4

Pin 5

Pin 6

Pin 7

Pin 8

Pin 20

4 Which command is used to enable asynchronous dialup on a serial interface?

physical-mode async

dialer-group layer async

physical-layer async

modem inout

5 What are three functions that chat scripts perform?

SNMP management

modem configuration

failure detection

dialing and remote login

6 Which one of the following modem commands on a USR modem shows the settings and configuration?

AT and F

ATI4

ATE0

ATM0

7 With asynchronous communication, which three of the eight pins in a DB25 connector are used for data transfer? Choose three Pin 2

Pin 3

Pin 4

Pin 5

Pin 6

Pin 7

Pin 8

Pin 20

8 Frame Relay describes the interconnection process between which two types of equipment?

DTE and DTE

DCE and DCE

CPE and DTE

CPE and DCE

9 When a modem powers up, how does the connected computer know that the DCE is ready to use?

The modem sets DTR pin 20

The modem sets DSR pin 5

The modem sets DSR pin 6

The modem sets DTE pin 4

10 Which three statements are true regarding the command “telnet 10.10.30.4 2009”?

It is used to reverse Telnet using port 2009

It is used to access port 2009 on a specific device

A modem is connected to line 9

It specifies a BRI connection to be used for Telnet

The “modem inout” command has not been configured on the line

11 Which command will allow a router to attempt to discover the modem to which it is attached?

modem autoconfigure discovery

modem discovery autoconfigure

modem autoconfigure type discovery

modem discovery type autoconfigure

12 What are the three types of modulation within asynchronous signaling?

parity

amplitude

frequency

phase

13 When configuring an asynchronous line, what is the result of issuing the command “flowcontrol hardware”?

It sets RAM aside to buffer incoming and outgoing data

It sets the line to use CTS/RTS flow control

It sets the modem to handle flow control instead of the router

It sets the modem to use MNP4 firmware

14 On the digital end, a modem should be set:

As fast as it can go (usually 115 Kbps)

As slow as it can go

At a speed that matches the modem’s capability

At 56 KBPS

15 What does the lock DTE modem attribute do?

Protects the modem from being hacked

Prevents the DCE from receiving information from the DTE

Prevents the DTE from receiving information from the DCE

Locks the data speed between the modem and the DTE device

16 If you wish to add a new entry to the modem capabilities database, which command would you use?

modem cap

modem add

set modem

modem edit

17 For the DTE to terminate an existing connection, it must:

Drop DTR

Drop CTS

Send ATH to the DCE

Drop CD

18 What eight pins on a DB25 connector are used to connect a DTE?

2,3,4,5,6,7,8,20

1,2,3,4,5,6,7,8

2,4,5,6,7,8,9,20

2,3,4,5,6,7,9,20

19 With asynchronous communication, which two of the eight pins in a DB25 connector are used to control the flow of data? Choose two

Pin 2

Pin 3

Pin 4

Pin 5

Pin 6

Pin 7

Pin 8

Pin 20

20 Which three commands are configured from the line configuration mode?

encapsulation ppp

async mode interactive

modem inout

speed 115200

flowcontrol hardware

21 On an EIA/TIA-232 null modem cable with DB25 connectors, which two pins are cross- connected? Pin 2

Pin 3

Pin 4

Pin 5

Pin 7

Pin 8

22 What occurs when there is no longer a signal on the DTR?

The CD tells the DTE that a DCE-to-DCE connection has been established

The DTE issues a RTS to the DCE enabling communication

The DCE terminates its connection with the remote modem

The DTE applies voltage on pin 20 to alert the DCE that it is connected and available to receive data

23 Which signal indicates that the DTE is available to accept a call?

DSR up

RTS up

CTS up

DTR up

24 What does a modem use to transmit data?

TD

CTS

RTS

RD

25 Which two statements are true regarding the command “telnet 1.2.3.4 2007”?

Establishes a reverse telnet connection

The data is sent to individual line 2007

The data is sent to individual line 7

The data is sent to individual line 2

26 On a Cisco 3640 Access router, what is the line number of the 8th port in slot number 1?

40

64

65

98

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