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CCENT Practice Certification Exam # 2 - CCNA Exploration: Accessing the WAN (Version 4!"1. Data is being sent from a source PC to a destination server. Which three statements correctly describe the function of TCP or UDP in this situation? (Choose three.)

The $P %estination port n&m'er i%entifies the application or serice on the serer )hich )ill han%le the %ataTCP is the referred rotocol !hen a function re"uires lo!er net!or# overhead.$P segments are encaps&late% )ithin *P pac+ets for transport across the net)or+The so&rce port fiel% i%entifies the r&nning application or serice that )ill han%le %ata ret&rning to the PC

The TCP source ort number identifies the sending host on the net!or#.The TCP rocess running on the PC randomly selects the destination ort !hen establishing a session !ith the server.

$. %n !hat t!o situations !ould UDP be the referred transort rotocol over TCP? (Choose t!o.)!hen alications need to guarantee that a ac#et arrives intact& in se"uence& and undulicated)hen a faster %elier, mechanism is nee%e%!hen delivery overhead is not an issue)hen applications %o not nee% to g&arantee %elier, of the %ata!hen destination ort numbers are dynamic

'. efer to the ehibit. Wor#station * sends an %P ac#et to !or#station +. Which t!o statements describe the encasulation of the ac#et as it asses through the net!or#?

The a,er 2 hea%er is strippe% from the pac+et ', each ro&terThe destination ,ayer $ address of the ac#et does not change.The source ,ayer ' address of the ac#et changes at each router.The a,er 2 hea%er changes at each ro&terThe ,ayer ' header is stried from the ac#et by each router.

-. efer to the ehibit. * s!itch !ith a default configuration connects four hosts. The *P table for host * is sho!n. What haens !hen host * !ants to send an %P ac#et tohost D?

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ost * sends an *P re"uest to the /*C address of host D.ost D sends an *P re"uest to host *.ost * sends out the ac#et to the s!itch. The s!itch sends the ac#et only to the host D& !hich in turn resonds.

.ost A sen%s o&t a 'roa%cast of //://://://://:// Eer, other host connecte% to the s)itch receies the 'roa%cast an% host $ respon%s )ith its 0ACa%%ress

0. What three services are rovided by the transort layer? (Choose three.)flo) controlencrytion of dataath determinationconnection esta'lishmenterror recoer,bit transmissiondata reresentation

. Which layer of the 23% model handles the rocess of identifying and discarding damaged frames?resentation

sessiontransortnet!or#%ata lin+hysical

4. efer to the ehibit. Considering the information that follo!s and the ehibit& !here is the data flo!ing?3ource %P address5 16$.17.1.77

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Destination %P address5 $86.10.$88.$$03ource /*C address5 8891191$94a9-1918Destination /*C address5 8898d9cc9f-9ad9$c3ource Port5 1--Destination Port5 $'

* : from lato to access oint+ : from access oint to attached s!itchC 1 from host to %efa&lt gate)a, ro&terD : from router to %3P

7. efer to the ehibit. %f ost 1 needs to re"uest its %P address from the server& !hat rotocol !ould be used to rocess that re"uest?

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C3/*;CDC3/*;C*$.CP%C/P

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only alication and %nternet layersonly %nternet and net!or# access layersonly alication& %nternet& and net!or# access layersapplication transport *nternet an% net)or+ access la,ersonly alication& transort& net!or#& data lin#& and hysical layersalication& session& transort& net!or#& data lin#& and hysical layers

18. *+C comany needs to connect its router to an %3P to access the %nternet. What device is needed to connect the router to the %3P if the %3P sulies a T1 leased line for theconnection?

C3$3modemD3, router

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1'. * net!or# administrator !ants to configure a Cisco $68 s!itch so that access to each s!itch ort is limited to one /*C address. What !ill accomlish the administrator>sobective?

Cisco Discovery Protocolport sec&rit,%nternet Control /essage Protocolaccess lists

flo! control

1-. When !ould you !ant to use the s)itchport port-sec&rit, mac-a%%ress stic+,command?!henever you need to rotect an unused s!itch ort!henever you !ant the ort to only allo! a single host device to connect!henever you need the ort to recogni@e the statically assigned /*C address in the /*C address table)heneer m&ltiple %eices share the same port

10. efer to the ehibit. 3WA1 and 3WA$ have been configured !ith B,*

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A%% a a,er 7 %eice to the net)or+

1. When configuring a s!itch to use 33 for virtual terminal connections& !hat is the urose of the cr,pto +e, generate rsacommand?sho! 33 connected hostsdisconnect 33 connected hostscreate a p&'lic an% priate +e, pairsho! active 33 orts on the s!itch

access the 33 database configuration

14. Which three statements are true about full9dule oeration on an thernet net!or#? (Choose three.)There are no collisions in f&ll-%&plex mo%eA %e%icate% s)itch port is re8&ire% for each no%eub orts are reconfigured for full9dule mode.The host net!or# card must detect the availability of the media before transmitting.The host net)or+ car% an% the s)itch port m&st 'oth 'e in f&ll-%&plex mo%e

17. What are three characteristics of C3/*;CD? (Choose three.)Devices can be configured !ith a higher transmission riority.

* am signal indicates that the collision has cleared and the media is not busy.A %eice listens an% )aits &ntil the me%ia is not '&s, 'efore transmittingThe device !ith the electronic to#en is the only one that can transmit after a collision.

All of the %eices on a segment see %ata that passes on the net)or+ me%i&mAfter %etecting a collision hosts can attempt to res&me transmission after a ran%om time %ela, has expire%

16.

$8. Which three addresses are valid ublic addresses? (Choose three.)595772595;16$.17.1.$-018.10.$08.0525!;5255;16$.10.'81.$-8

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14$.1.11$.$005;25

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55!!!!!!!!!55555!!!!!5555!555!55

$0. iven a host !ith the %P address 16$.17.0.0- and a subnet mas# of $00.$00.$00.$-8& to !hich net!or# does the host belong?16$.17.0.116$.17.0.'$5925

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$0$$0-$0=!01801$

$6. What are three valid host addresses given a subnet mas# of $00.$00.$0-.8? (Choose three.)

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A>CD=

'1. What tye of cable is used for connectivity bet!een a model $$8 router and a model $608 s!itch (oint *)& a model $608 s!itch and a model 1688 s!itch (oint +)& and amodel $608 s!itch and a host (oint C)?

* : straight9throughE + : rolloverE C : straight9through* : crossoverE + : straight9throughE C : straight9through* : straight9throughE + : straight9throughE C : crossover* : crossoverE + : straight9throughE C : crossoverA 1 straight-thro&gh? > 1 crossoer? C 1 straight-thro&gh

* : straight9throughE + : crossoverE C : crossover

'$. efer to the ehibit. * small business has as#ed for advice about !hat tye of cable !ill be needed to connect their modular routers. What tye of connector is used by eachdevice that is sho!n?

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W%C9$T is a D+8 connector& W%C1T is a 3mart 3erial connector& and W%C91

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'-. Why is it imortant for the router to maintain an accurate routing table?to rovide ,ayer $ addressing information for the net hoto revent broadcasts from occurring on the ,*