Pass4sure 200-125 Real Question Answers

TestsChamp

Cisco

200-125

Exam Name:

Cisco Certiei Network Associate

Proiuct: Demo

We also proviie Practce Test Sofwaree Online Practce Test Engine aniViieo Tutorials. Visit our website to purchase full version of Practce Test

of Viieo Tutorials & to try practce test sofware for free:

http://www.testschamp.com/200-125.html

We also ofee PRACTICE TEST SOFTWARE with Actual Exam Questoos - Tey feee demo feom oue Website

Page | 2

Version: 6.0

Questoo: 1

Refer to the exhibit:

What will Router1 io when it receives the iata frame shown? (Choose three.)

A. Router1 will strip of the source MAC aiiress ani replace it with the MAC aiiress0000.0c36.6965.B. Router1 will strip of the source IP aiiress ani replace it with the IP aiiress 192.168.40.1.C. Router1 will strip of the iestnaton MAC aiiress ani replace it with the MAC aiiress0000.0c07.4320.D. Router1 will strip of the iestnaton IP aiiress ani replace it with the IP aiiress of 192.168.40.1.E. Router1 will forwari the iata packet out interface FastEthernet0/1.F. Router1 will forwari the iata packet out interface FastEthernet0/2.

Aoswee: A, C, F

Explanaton:Remembere the source ani iestnaton MAC changes as each router hop along with the TTL beingiecrementei but the source ani iestnaton IP aiiress remain the same from source to iestnaton.

Questoo: 2

Refer to the exhibit.


Page | 3

Which three statements correctly iescribe Network Device A? (Choose three.)

A. With a network wiie mask of 255.255.255.128e each interface ioes not require an IP aiiress.B. With a network wiie mask of 255.255.255.128e each interface ioes require an IP aiiress on aunique IP subnet.C. With a network wiie mask of 255.255.255.0e must be a Layer 2 ievice for the PCs to communicatewith each other.D. With a network wiie mask of 255.255.255.0e must be a Layer 3 ievice for the PCs to communicatewith each other.E. With a network wiie mask of 255.255.254.0e each interface ioes not require an IP aiiress.

Aoswee: B, D, E

Explanaton:If Subnet Mask is 255.255.255.128 the hosts vary from x.x.x.0 - x.x.x.127 & x.x.x.128- x.x.x.255e so theIP Aiiresses of 2 hosts fall in iiferent subnets so each interface neeis an IP an aiiress so that theycan communicate each other.If Subnet Mask is 255.255.255.0 the 2 speciiei hosts fall in iiferent subnets so they neei a Layer 3ievice to communicate.If Subnet Mask is 255.255.254.0 the 2 speciiei hosts are in same subnet so are in network aiiressani can be accommoiatei in same Layer 2 iomain ani can communicate with each other iirectlyusing the Layer 2 aiiress.

Questoo: 3

Which layer in the OSI reference moiel is responsible for ietermining the availability of the receivingprogram ani checking to see if enough resources exist for that communicaton?

A. transportB. networkC. presentatonD. sessionE. applicaton

Aoswee: E

Explanaton:This queston is to examine the OSI reference moiel.The Applicaton layer is responsible for iientfying ani establishing the availability of the intenieicommunicaton partner ani ietermining whether sufcient resources for the intenieicommunicaton exist.

Questoo: 4


Page | 4

Which of the following iescribes the roles of ievices in a WAN? (Choose three.)

A. A CSU/DSU terminates a iigital local loop.B. A moiem terminates a iigital local loop.C. A CSU/DSU terminates an analog local loop.D. A moiem terminates an analog local loop.E. A router is commonly consiierei a DTE ievice.F. A router is commonly consiierei a DCE ievice.

Aoswee: A, D, E

Explanaton:The iiea behini a WAN is to be able to connect two DTE networks together through a DCE network.The network’s DCE ievice (incluies CSU/DSU) proviies clocking to the DTE-connectei interface (therouter’s serial interface).

A moiem moiulates outgoing iigital signals from a computer or other iigital ievice to analogsignals for a conventonal copper twistei pair telephone line ani iemoiulates the incoming analogsignal ani converts it to a iigital signal for the iigital ievice. A CSU/DSU is usei between two iigitallines -For more explanaton of answer De in telephony the local loop (also referrei to as a subscriber line) isthe physical link or circuit that connects from the iemarcaton point of the customer premises to theeige of the carrier or telecommunicatons service proviier’s network. Therefore a moiemterminates an analog local loop is correct.

Questoo: 5



Page | 5

Host A pings interface S0/0 on router 3. What is the TTL value for that ping?

A. 252B. 253C. 254D. 255

Aoswee: B

Explanaton:From the CCNA ICND2 Exam book: “Routers iecrement the TTL by 1 every tme they forwari apacket; if a router iecrements the TTL to 0e it throws away the packet. This prevents packets fromrotatng forever.” I want to make it clear that before the router forwaris a packete the TTL is stllremain the same. For example in the topology abovee pings to S0/1 ani S0/0 of Router 2 have thesame TTL.The picture below shows TTL values for each interface of each router ani for Host B. Notce that HostA initaliies ICMP packet with a TTL of 255:


Page | 6

Questoo: 6

A network aiministrator is verifying the coniguraton of a newly installei host by establishing an FTPconnecton to a remote server. What is the highest layer of the protocol stack that the networkaiministrator is using for this operaton?

A. applicatonB. presentatonC. sessionD. transportE. internetF. iata link

Aoswee: A

Explanaton:FTP belongs to Applicaton layer ani it is also the highest layer of the OSI moiel.

Questoo: 7



Page | 7

Afer HostA pings HostBe which entry will be in the ARP cache of HostA to support this transmission?

Aoswee: A

Explanaton:Host A knows host B is in another network so it will seni the pings to its iefault gateway192.168.6.1. Host A senis a broaicast frame asking the MAC aiiress of 192.168.6.1. Thisinformaton (IP ani MAC aiiress of the iefault gateway) is savei in its ARP cache for later use.

Questoo: 8

A network interface port has collision ietecton ani carrier sensing enablei on a sharei twistei pairnetwork. From this statemente what is known about the network interface port?

A. This is a 10 Mb/s switch port.B. This is a 100 Mb/s switch port.


Page | 8

C. This is an Ethernet port operatng at half iuplex.D. This is an Ethernet port operatng at full iuplex.E. This is a port on a network interface cari in a PC.

Aoswee: C

Explanaton:Moiern Ethernet networks built with switches ani full-iuplex connectons no longer utliieCSMA/CD. CSMA/CD is only usei in obsolete sharei meiia Ethernet (which uses repeater or hub).

Questoo: 9

A receiving host computes the checksum on a frame ani ietermines that the frame is iamagei. Theframe is then iiscariei. At which OSI layer iii this happen?

A. sessionB. transportC. networkD. iata linkE. physical

Aoswee: D

Explanaton:The Data Link layer proviies the physical transmission of the iata ani haniles error noticatonenetwork topologye ani fow control. The Data Link layer formats the message into piecese each calleia iata framee ani aiis a customiiei heaier containing the hariware iestnaton ani sourceaiiress. Protocols Data Unit (PDU) on Datalink layer is callei frame. Accoriing to this queston theframe is iamagei ani iiscariei which will happen at the Data Link layer.

Questoo: 10

Which of the following correctly iescribe steps in the OSI iata encapsulaton process? (Choose two.)

A. The transport layer iiviies a iata stream into segments ani may aii reliability ani fow controlinformaton.B. The iata link layer aiis physical source ani iestnaton aiiresses ani an FCS to the segment.C. Packets are createi when the network layer encapsulates a frame with source ani iestnatonhost aiiresses ani protocol-relatei control informaton.D. Packets are createi when the network layer aiis Layer 3 aiiresses ani control informaton to asegment.E. The presentaton layer translates bits into voltages for transmission across the physical link.

Aoswee: A, D

Explanaton:The transport layer segments iata into smaller pieces for transport. Each segment is assignei asequence numbere so that the receiving ievice can reassemble the iata on arrival.The transport layer also use fow control to maximiie the transfer rate while minimiiing therequirements to retransmit. For examplee in TCPe basic fow control is implementei byacknowleigment by the receiver of the receipt of iata; the senier waits for this acknowleigmentbefore seniing the next part.The Network layer (Layer 3) has two key responsibilites. Firste this layer controls the logicalaiiressing of ievices. Seconie the network layer ietermines the best path to a partcular iestnatonnetworke ani routes the iata appropriately.


Page | 9

Questoo: 11

Refer to the graphic.

Host A is communicatng with the server. What will be the source MAC aiiress of the framesreceivei by Host A from the server?

A. the MAC aiiress of router interface e0B. the MAC aiiress of router interface e1C. the MAC aiiress of the server network interfaceD. the MAC aiiress of host A

Aoswee: A

Explanaton:Whereas switches can only examine ani forwari packets basei on the contents of the MAC heaiererouters can look further into the packet to iiscover the network for which a packet is iestnei.Routers make forwariing iecisions basei on the packet's network-layer heaier (such as an IPXheaier or IP heaier). These network-layer heaiers contain source ani iestnaton networkaiiresses. Local ievices aiiress packets to the router's MAC aiiress in the MAC heaier. Aferreceiving the packetse the router must perform the following steps:1. Check the incoming packet for corruptone ani remove the MAC heaier. The router checks thepacket for MAC-layer errors. The router then strips of the MAC heaier ani examines the network-layer heaier to ietermine what to io with the packet.2. Examine the age of the packet. The router must ensure that the packet has not come too far to beforwariei. For examplee IPX heaiers contain a hop count. By iefaulte 15 hops is the maximumnumber of hops (or routers) that a packet can cross. If a packet has a hop count of 15e the routeriiscaris the packet. IP heaiers contain a Time to Live (TTL) value. Unlike the IPX hop counte whichincrements as the packet is forwariei through each routere the IP TTL value iecrements as the IPpacket is forwariei through each router. If an IP packet has a TTL value of 1e the router iiscaris thepacket. A router cannot iecrement the TTL value to 1 ani then forwari the packet.3. Determine the route to the iestnaton. Routers maintain a routng table that lists availablenetworkse the iirecton to the iesirei network (the outgoing interface number)e ani the iistance tothose networks. Afer ietermining which iirecton to forwari the packete the router must buili anew heaier. (If you want to reai the IP routng tables on a Winiows 95/98 workstatone type ROUTEPRINT in the DOS box.)4. Buili the new MAC heaier ani forwari the packet. Finallye the router builis a new MAC heaierfor the packet. The MAC heaier incluies the router's MAC aiiress ani the inal iestnaton's MACaiiress or the MAC aiiress of the next router in the path.

Questoo: 12


Page | 10


What two results wouli occur if the hub were to be replacei with a switch that is conigurei withone Ethernet VLAN? (Choose two.)

A. The number of collision iomains wouli remain the same.B. The number of collision iomains wouli iecrease.C. The number of collision iomains wouli increase.D. The number of broaicast iomains wouli remain the same.E. The number of broaicast iomains wouli iecrease.F. The number of broaicast iomains wouli increase.

Aoswee: C, D

Explanaton:Basicallye a collision iomain is a network segment that allows normal network trafc to fow backani forth. In the oli iays of hubse this meant you hai a lot of collisionse ani the oli CSMA/CD woulibe working overtme to try to get those packets re-sent every tme there was a collision on the wire(since Ethernet allows only one host to be transmitng at once without there being a trafc jam).With switchese you break up collision iomains by switching packets bouni for other collisioniomains. These iayse since we mostly use switches to connect computers to the networke yougenerally have one collision iomain to a PC.Broaicast iomains are exactly what they imply: they are network segments that allow broaicasts tobe sent across them. Since switches ani briiges allow for broaicast trafc to go unswitcheiebroaicasts can traverse collision iomains freely. Routerse howevere ion't allow broaicasts throughby iefaulte so when a broaicast hits a router (or the perimeter of a VLAN)e it ioesn't get forwariei.The simple way to look at it is this way: switches break up collision iomainse while routers (aniVLANs) break up collision iomains ani broaicast iomains. Alsoe a broaicast iomain can containmultple collision iomainse but a collision iomain can never have more than one broaicast iomainassociatei with it.Collision Domain: A group of Ethernet or Fast Ethernet ievices in a CSMA/CD LAN that are connecteiby repeaters ani compete for access on the network. Only one ievice in the collision iomain maytransmit at any one tmee ani the other ievices in the iomain listen to the network in orier to avoiiiata collisions. A collision iomain is sometmes referrei to as an Ethernet segment.Broaicast Domain: Broaicastng senis a message to everyone on the local network (subnet). Anexample for Broaicastng wouli be DHCP Request from a Client PC. The Client is asking for a IPAiiresse but the client ioes not know how to reach the DHCP Server. So the client senis a DHCPDiscover packet to EVERY PC in the local subnet (Broaicast). But only the DHCP Server will answer tothe Request.How to count them?Broaicast Domain:No mater how many hosts or ievices are connectei togethere if they are connectei with a repeaterehube switch or briigee all these ievices are in ONE Broaicast iomain (assuming a single VLAN). ARouter is usei to separate Broaicast-Domains (we couli also call them Subnets - or call them


Page | 11

VLANs).Soe if a router stanis between all these ievicese we have TWO broaicast iomains.Collision Domain:Each connecton from a single PC to a Layer 2 switch is ONE Collision iomain. For examplee if 5 PCsare connectei with separate cables to a switche we have 5 Collision iomains. If this switch isconnectei to another switch or a routere we have one collision iomain more.If 5 Devices are connectei to a Hube this is ONE Collision Domain. Each ievice that is connectei to aLayer 1 ievice (repeatere hub) will resiie in ONE single collision iomain.

Questoo: 13

Which three statements accurately iescribe Layer 2 Ethernet switches? (Choose three.)

A. Spanning Tree Protocol allows switches to automatcally share VLAN informaton.B. Establishing VLANs increases the number of broaicast iomains.C. Switches that are conigurei with VLANs make forwariing iecisions basei on both Layer 2 aniLayer 3 aiiress informaton.D. Microsegmentaton iecreases the number of collisions on the network.E. In a properly functoning network with reiuniant switchei pathse each switchei segment willcontain one root briige with all its ports in the forwariing state. All other switches in that broaicastiomain will have only one root port.F. If a switch receives a frame for an unknown iestnatone it uses ARP to resolve the aiiress.

Aoswee: B, D, E

Explanaton:Microsegmentaton is a network iesign (functonality) where each workstaton or ievice on anetwork gets its own ieiicatei segment (collision iomain) to the switch. Each network ievice getsthe full baniwiith of the segment ani ioes not have to share the segment with other ievices.Microsegmentaton reiuces ani can even eliminate collisions because each segment is its owncollision iomain ->.Note: Microsegmentaton iecreases the number of collisions but it increases the number of collisioniomains.

Questoo: 14

Where ioes routng occur within the DoD TCP/IP reference moiel?

A. applicatonB. internetC. networkD. transport

Aoswee: B

Explanaton:The picture below shows the comparison between TCP/IP moiel & OSI moiel. Notce that theInternet Layer of TCP/IP is equivalent to the Network Layer which is responsible for routng iecision.


Page | 12

Questoo: 15

Refer to exhibit:

Which two iestnaton aiiresses will be usei by Host A to seni iata to Host C? (Choose two.)

A. the IP aiiress of Switch 1B. the MAC aiiress of Switch 1C. the IP aiiress of Host CD. the MAC aiiress of Host CE. the IP aiiress of the router's E0 interfaceF. the MAC aiiress of the router's E0 interface

Aoswee: C, F

Explanaton:While transferring iata through many iiferent networkse the source ani iestnaton IP aiiressesare not changei. Only the source ani iestnaton MAC aiiresses are changei. So in this case Host Awill use the IP aiiress of Host C ani the MAC aiiress of E0 interface to seni iata. When the routerreceives this iatae it replaces the source MAC aiiress with its own E1 interface’s MAC aiiress anireplaces the iestnaton MAC aiiress with Host C’s MAC aiiress before seniing to Host C.

Questoo: 16

For what two purposes ioes the Ethernet protocol use physical aiiresses? (Choose two.)


Page | 13

A. to uniquely iientfy ievices at Layer 2B. to allow communicaton with ievices on a iiferent networkC. to iiferentate a Layer 2 frame from a Layer 3 packetD. to establish a priority system to ietermine which ievice gets to transmit irstE. to allow communicaton between iiferent ievices on the same networkF. to allow ietecton of a remote ievice when its physical aiiress is unknown

Aoswee: A, E

Explanaton:Physical aiiresses or MAC aiiresses are usei to iientfy ievices at layer 2.MAC aiiresses are only usei to communicate on the same network. To communicate on iiferentnetwork we have to use Layer 3 aiiresses (IP aiiresses) -> B is not correct.Layer 2 frame ani Layer 3 packet can be recogniiei via heaiers. Layer 3 packet also contains physicalaiiress ->.On Ethernete each frame has the same priority to transmit by iefault ->.All ievices neei a physical aiiress to iientfy itself. If note they cannot communicate ->.

Questoo: 17


Basei on the informaton givene which switch will be electei root briige ani why?

A. Switch Ae because it has the lowest MAC aiiressB. Switch Ae because it is the most centrally locatei switchC. Switch Be because it has the highest MAC aiiressD. Switch Ce because it is the most centrally locatei switchE. Switch Ce because it has the lowest priorityF. Switch De because it has the highest priority

Aoswee: E

Explanaton:To elect the root briige in the LANe irst check the priority value. The switch having the lowestpriority will win the electon process. If Priority Value is the same then it checks the MAC Aiiress;the switch having the lowest MAC Aiiress will become the root briige. In this casee switch C has thelowest MAC Aiiress so it becomes the root briige.

Questoo: 18

Which of the following statements iescribe the network shown in the graphic? (Choose two.)


Page | 14

A. There are two broaicast iomains in the network.B. There are four broaicast iomains in the network.C. There are six broaicast iomains in the network.D. There are four collision iomains in the network.E. There are ive collision iomains in the network.F. There are seven collision iomains in the network.

Aoswee: A, F

Explanaton:Only router can break up broaicast iomains so in the exhibit there are 2 broaicast iomains: from e0interface to the lef is a broaicast iomain ani from e1 interface to the right is another broaicastiomain ->.Both router ani switch can break up collision iomains so there is only 1 collision iomain on the lefof the router (because hub ioesn’t break up collision iomain) ani there are 6 collision iomains onthe right of the router (1 collision iomain from e1 interface to the switch + 5 collision iomains for 5PCs in Proiucton) ->.

Questoo: 19

In an Ethernet networke unier what two scenarios can ievices transmit? (Choose two.)

A. when they receive a special tokenB. when there is a carrierC. when they ietect no other ievices are seniingD. when the meiium is iileE. when the server grants access

Aoswee: C, D

Explanaton:Ethernet network is a sharei environment so all ievices have the right to access to the meiium. Ifmore than one ievice transmits simultaneouslye the signals colliie ani cannot reach the iestnaton.If a ievice ietects another ievice is seniinge it will wait for a speciiei amount of tme beforeatemptng to transmit.When there is no trafc ietecteie a ievice will transmit its message. While this transmission isoccurringe the ievice contnues to listen for trafc or collisions on the LAN. Afer the message is sentethe ievice returns to its iefault listening moie.


Page | 15

Questoo: 20

A router has two Fast Ethernet interfaces ani neeis to connect to four VLANs in the local network.How can you accomplish this taske using the fewest physical interfaces ani without iecreasingnetwork performance?

A. Use a hub to connect the four VLANS with a Fast Ethernet interface on the router.B. Aii a seconi router to hanile the VLAN trafc.C. Aii two more Fast Ethernet interfaces.D. Implement a router-on-a-stck coniguraton.

Aoswee: D

Explanaton:A router on a stck allows you to use sub-interfaces to create multple logical networks on a singlephysical interface.


Page | 16

THANKS FOR TRYING THE DEMO OF OUR PRODUCT

Visit Our Site to Purchase the Full Set of Actual 200-125 Exam Questonswith Answers.


We also proviie Practce Test Sofwaree Online Practce Test Engine aniViieo Tutorials. Visit our website to purchase full version of Practce Test

of Viieo Tutorials & to try practce test sofware for free:


Mooey Back Guaeaotee

Education

Pass4sure 200-125 Real Question Answers