Đề Thi Trắc Nghiệm CCNA Full

Answer: D,F Explanation: QUESTION NO: 4 Refer to the exhibit.. to obtain the IP address of a connected device in order to telnet to the device Answer: E,F Explanation: Cisco Discover

Cisco 640-802

Cisco Certified Network Associate (CCNA)

Version: 9.4

Topic 1, Volume A

QUESTION NO: 1

Refer to the exhibit What could be possible causes for the "Serial0/0 is down" interface status?(Choose two.)

A A Layer 1 problem exists

B The bandwidth is set too low

C A protocol mismatch exists

D An incorrect cable is being used

E There is an incorrect IP address on the Serial 0/0 interface

A the amount of available ROM

B the amount of available flash and RAM memory

C the version of the bootstrap software present on the router

QUESTION NO: 3

Refer to the exhibit Which two statements are true about interVLAN routing in the topology that isshown in the exhibit? (Choose two.)

A Host E and host F use the same IP gateway address

B Router1 and Switch2 should be connected via a crossover cable

C Router1 will not play a role in communications between host A and host D

D The FastEthernet 0/0 interface on Router1 must be configured with subinterfaces

E Router1 needs more LAN interfaces to accommodate the VLANs that are shown in the exhibit

F The FastEthernet 0/0 interface on Router1 and Switch2 trunk ports must be configured using

the same encapsulation type

Answer: D,F

Explanation:

QUESTION NO: 4

Refer to the exhibit Which two statements are true about the loopback address that is configured

on RouterB? (Choose two.)

A It ensures that data will be forwarded by RouterB

B It provides stability for the OSPF process on RouterB

C It specifies that the router ID for RouterB should be 10.0.0.1

D It decreases the metric for routes that are advertised from RouterB

E It indicates that RouterB should be elected the DR for the LAN

A In the VTP client mode, a switch is unable to update its local VLAN database

B Configure a trunk link between the switches to forward VTP updates

C In the VTP server mode, a switch is able to update a switch in the VTP transparent mode

D In the VTP transparent mode, a switch will forward the received updates to other switches

E A switch in the VTP server mode only updates switches in the VTP client mode that have a

higher VTP revision number

F A switch in the VTP server mode will update switches in the VTP client mode regardless of the

configured VTP domain membership

Answer: A,B,D

Explanation:

VTP operates in one of three modes:

Server - In this VTP mode you can create, remove, and modify VLANs You can also set otherconfiguration options like the VTP version and also turn on/off VTP pruning for the entire VTPdomain VTP servers advertise their VLAN configuration to other switches in the same VTP

domain and synchronize their VLAN configuration with other switches based on messages

received over trunk links VTP server is the default mode The VLANs information are stored onNVRAM and they are not lost after a reboot

Client - VTP clients behave the same way as VTP servers, but you cannot create, change, ordelete VLANs on the local device In VTP client mode, VLAN configurations are not saved inNVRAM

QUESTION NO: 6

Cisco IOS (originally Internetwork Operating System) is the software used on the vast majority ofCisco Systems routers and all current Cisco network switches Which two of the following devicescould you configure as a source for the IOS image in the boot system command? (Choose two.)

What are two reasons a network administrator would use CDP? (Choose two.)

A to obtain VLAN information from directly connected switches

B to determine the status of network services on a remote device

C to determine the status of the routing protocols between directly connected routers

D to verify the type of cable interconnecting two devices

E to verify Layer 2 connectivity between two devices when Layer 3 fails

F to obtain the IP address of a connected device in order to telnet to the device

Answer: E,F

Explanation:

Cisco Discovery Protocol (CDP) is primarily used to obtain protocol addresses of neighboringdevices and discover the platform of those devices CDP can also be used to show informationabout the interfaces your router uses CDP is an independent media protocol and runs on allCisco-manufactured devices including routers, bridges, access servers, and switches It should benoted that CDP is a protocol which works on the layer2 By default, multicast advertise is sentevery 60 seconds to 01-00-0 c-cc-cc-cc as the destination address When reaching the holdtime

of 180 seconds , if not receiving the advertise from neighboring devices yet, the information ofneighboring devices will be cleared

Cisco Discovery Protocol (CDP) is a proprietary protocol designed by Cisco to help administratorscollect information about both locally attached and remote devices By using CDP, you can gatherhardware and protocol information about neighbor devices, which is useful info for troubleshootingand documenting the network

You can use:

Show cdp neighbor

Show cdp neighbor details

Commands to gather the information of connected neighbors

QUESTION NO: 8

Refer to the exhibit Both switches are using a default configuration Which two destination

addresses will host 4 use to send data to host 1? (Choose two.)

A the IP address of host 1

B the IP address of host 4

C the MAC address of host 1

D the MAC address of host 4

E the MAC address of the Fa0/0 interface of the R1 router

F the MAC address of the Fa0/1 interface of the R1 router

Answer: A,F

Explanation:

QUESTION NO: 9

Exhibit:

Refer to the exhibit The router has been configured with these commands:

What are the two results of this configuration? (Choose two.)

A The default route should have a next hop address of 64.100.0.3

B Hosts on the LAN that is connected to FastEthernet 0/1 are using public IP addressing

C The address of the subnet segment with the WWW server will support seven more servers

D The addressing scheme allows users on the Internet to access the WWW server

E Hosts on the LAN that is connected to FastEthernet 0/1 will not be able to access the Internet

without address translation

Answer: D,E

Explanation:

Since the hosts on the Fast Ethernet 0/1 network are using private RFC 1918 IP addressing

(192.168.10.0/24) their IP addresses will need to be translated into a publicly routable address inorder to access the Internet However, the server is using the 198.133.219.9 IP address, which ispublicly routable and so Internet users can indeed access this server (assuming that the

198.133.219.9 IP address has been correctly assigned to the network)

QUESTION NO: 10

Your Company has installed IP phones Both the phones and the office computers connect to thesame device The phone traffic and the office computer data traffic must be on different networks

to ensure maximum throughput for the phone data Which network device can be best connected

to the phones and computers, and which technology will be performed on this device? (Choosetwo.)

Which two benefits can be obtained by using VTP in a switching environment? (Choose two.)

A Allowing frames from multiple VLANs to use a single interface

B Allowing switches to read frame tags

C Maintaining VLAN consistency across a switched network

D Allowing VLAN information to be automatically propagated throughout the switching

environment

E It allows ports to be assigned to VLANs automatically

Answer: C,D

Explanation:

VTP minimizes the possible configuration inconsistencies that arise when changes are made.These inconsistencies can result in security violations, because VLANs can crossconnect whenduplicate names are used They also could become internally disconnected when they are

mapped from one LAN type to another, for example, Ethernet to ATM LANE ELANs or FDDI

802.10 VLANs VTP provides a mapping scheme that enables seamless trunking within a networkemploying mixed-media technologies

VTP provides the following benefits:

QUESTION NO: 12

Which two statements are true about the command ip route 172.16.3.0 255.255.255.0

192.168.2.4? (Choose two.)

A It establishes a static route to the 172.16.3.0 network

B It configures the router to send any traffic for an unknown destination to the 172.16.3.0 network

C It creates a static route to the 192.168.2.0 network

D It uses the default administrative distance

E It configures the router to send any traffic for an unknown destination out the interface with the

QUESTION NO: 13

Which two of the following are advantages of Layer 2 Ethernet switches over hubs? (Choose two.)

A To increase the size of broadcast domains

B To filter frames according to MAC addresses

C To allow simultaneous frame transmissions

D To increase the maximum length of UTP cabling between devices

E decreasing the number of collision domains

F increasing the size of broadcast domains

Answer: B,E

Explanation:

the whole point of a switch over a hub is to reduce the number of collision domains, so answer

“decreasing the number of collision domains” is a far better one than the very amibiguous answer

“To allow simultaneous frame transmissions”

A hub is a broadcast domain and a collision domain, while a switch is a broadcast domain, eachinterface is a collision domain The switch is a device of data link layer, forwards and floods dataframes based on the MAC address The hub adopts the shared bandwidth working mode, whilethe switch adopts dedicated bandwidth

A half duplex connection is where only one device can send or receive at a time A full duplexconnection is where both devices can send and receive at the same time

QUESTION NO: 14

Refer to the exhibit A network associate needs to configure the switches and router in the graphic

so that the hosts in VLAN3 and VLAN4 can communicate with the enterprise server in VLAN2.Which two Ethernet segments would need to be configured as trunk links? (Choose two.)

Layer 3 routing is needed to implement communication between VLANs, so a trunk link is

configured between ROuter and Switch2 Both Switch1 and Switch2own VLAN3 and VLAN4members, so a trunk link is configured between Switch1 and Switch2

Answer: A,C

Explanation:

Two values are compared to elect a root bridge in STP: bridge priority and MAC address

Switch having lowest bridge ID will become the root bridge The bridge ID is how STP keeps track

of all the switches in the network It is determined by a combination of the bridge priority (32,768

by default on all Cisco switches) and the base MAC address The bridge with the lowest bridge IDbecomes the root bridge in the network

QUESTION NO: 16

Refer to the exhibit Assume that the routing protocol referenced in each choice below is

configured with its default settings and the given routing protocol is running on all the routers.Which two conditional statements accurately state the path that will be chosen between networks10.1.0.0 and 10.3.2.0 for the routing protocol mentioned? (Choose two.)

A If OSPF is the routing protocol, the path will be from R1 to R3 to R4 to R5

B If OSPF is the routing protocol, the path will be from R1 to R2 to R5

C If OSPF is the routing protocol, the path will be from R1 to R5

D If RIPv2 is the routing protocol, the path will be from R1 to R3 to R4 to R5

E If RIPv2 is the routing protocol, the path will be from R1 to R5

Answer: A,E

Explanation:

A The IOS image will be ignored

B The router will prompt to enter initial configuration mode

C The router will boot to ROM

D Any configuration entries in NVRAM will be ignored

E The configuration in flash memory will be booted

Answer: B,D

Explanation:

QUESTION NO: 19

Refer to the exhibit The networks connected to router R2 have been summarized as a

192.168.176.0/21 route and sent to R1 Which two packet destination addresses will R1 forward toR2? (Choose two.)

Which three statements are typical characteristics of VLAN arrangements? (Choose three.)

A A new switch has no VLANs configured

B Connectivity between VLANs requires a Layer 3 device

C VLANs typically decrease the number of collision domains

D Each VLAN uses a separate address space

E A switch maintains a separate bridging table for each VLAN

F VLANs cannot span multiple switches

B The equal cost paths JAX-CHI-ORL and JAX- NY-ORL will be installed in the routing table if

RIPv2 is the routing protocol

C When EIGRP is the routing protocol, only the path JAX-ORL will be installed in the routing table

by default

D When EIGRP is the routing protocol, the equal cost paths JAX-CHI-ORL, and JAX-NY-ORL will

be installed in the routing table by default

E With EIGRP and OSPF both running on the network with their default configurations, the

EIGRP paths will be installed in the routing table

F The OSPF paths will be installed in the routing table, if EIGRP and OSPF are both running on

the network with their default configurations

Answer: A,D,E

Explanation:

QUESTION NO: 22

Refer to the exhibit Which three statements correctly describe Network Device A? (Choose three.)

A With a network wide mask of 255.255.255.128, each interface does not require an IP address

B With a network wide mask of 255.255.255.128, each interface does require an IP address on a

unique IP subnet

C With a network wide mask of 255.255.255.0, must be a Layer 2 device for the PCs to

communicate with each other

D With a network wide mask of 255.255.255.0, must be a Layer 3 device for the PCs to

communicate with each other

E With a network wide mask of 255.255.254.0, each interface does not require an IP address Answer: B,D,E

Explanation:

QUESTION NO: 23

On the basis of the IEEE 802.1w standard, which two switch ports can forward traffic?

A This switch has more than one interface connected to the root network segment in VLAN 2

B This switch is running RSTP while the elected designated switch is running 802.1d Spanning

Tree

C This switch interface has a higher path cost to the root bridge than another in the topology

D This switch has a lower bridge ID for VLAN 2 than the elected designated switch

Answer: C

Explanation:

This question is to check the STP technology

When STP is running in a network with loops, ports will transition into the forwarding state or theblocking state Here decisive factor is the cost to reach the root bridge, the port with the highercost is in the blocking state, while the port with the lower cost is in the forwarding state

QUESTION NO: 25

Refer to the exhibit The network administrator must establish a route by which London

workstations can forward traffic to the Manchester workstations What is the simplest way to

accomplish this?

A Configure a dynamic routing protocol on London to advertise all routes to Manchester

B Configure a dynamic routing protocol on London to advertise summarized routes to

Manchester

C Configure a dynamic routing protocol on Manchester to advertise a default route to the London

router

D Configure a static default route on London with a next hop of 10.1.1.1

E Configure a static route on London to direct all traffic destined for 172.16.0.0/22 to 10.1.1.2

F Configure Manchester to advertise a static default route to London

Answer: E

Explanation:

QUESTION NO: 26

Refer to the exhibit This command is executed on 2960Switch:

2960Switch(config)# mac-address-table static 0000.00aa.aaaa vlan 10 interface fa0/1

Which two of these statements correctly identify results of executing the command? (Choose two.)

A Port security is implemented on the fa0/1 interface

B MAC address 0000.00aa.aaaa does not need to be learned by this switch

C Only MAC address 0000.00aa.aaaa can source frames on the fa0/1 segment

D Frames with a Layer 2 source address of 0000.00aa.aaaa will be forwarded out fa0/1

E MAC address 0000.00aa.aaaa will be listed in the MAC address table for interface fa0/1 only Answer: B,E

Explanation:

QUESTION NO: 27

Which of the following describes the roles of devices in a WAN? (Choose three.)

A A CSU/DSU terminates a digital local loop

B A modem terminates a digital local loop

C A CSU/DSU terminates an analog local loop

D A modem terminates an analog local loop

E A router is commonly considered a DTE device

F A router is commonly considered a DCE device

Answer: A,D,E

Explanation:

Layer 2 switching is considered hardware-based bridging because it uses specialized hardwarecalled an application-specific integrated circuit (ASIC) ASICs can run up to gigabit speeds withvery low latency rates

A router is commonly considered to be a DTE device, while a CSU/DSU is considered the DCEdevice

Switches usually have higher port number then bridge Generally bridges have two ports Bothoperates on Data link layer

QUESTION NO: 28

What are two characteristics of Telnet? (Choose two.)

A It sends data in clear text format

B It is no longer supported on Cisco network devices

C It is more secure than SSH

D It requires an enterprise license in order to be implemented

E It requires that the destination device be configured to support Telnet connections

A single 802.11g access point has been configured and installed in the center of a square office Afew wireless users are experiencing slow performance and drops while most users are operating

at peak efficiency What are three likely causes of this problem? (Choose three.)

A mismatched TKIP encryption

B null SSID

C cordless phones

D mismatched SSID

E metal file cabinets

F antenna type or direction

meanwhile users need to set up SSID manually to enter the appropriate network In simple terms,SSID is the name of a local area network; only those computers that set up the same SSID valuescan communicate with each other If SSID fails to match, wireless will fail in connection, and nowireless network inefficiency will appear

C metal file cabinets may have a certain amount of shielding

D antenna type or direction

QUESTION NO: 31

Given that Host A and Host B are in different networks When Host A is trying to communicate withHost B, which step will Host A take first?

A Send a TCP SYN and wait for the SYN ACK with the IP address of Host B

B Drop the data

C Create an ARP request to get a MAC address for Host B

D Send the data frames to the default gateway

Answer: D

Explanation:

The answer “Create an ARP request to get a MAC address for Host B.” is NOT correct, the hostwill know if the destination is not on the local network and will send to MAC address of its default

gateway setting, it will not ARP for MAC address of remote destination

QUESTION NO: 32

Refer to the exhibit What two facts can be determined from the WLAN diagram? (Choose two.)

A The area of overlap of the two cells represents a basic service set (BSS)

B The network diagram represents an extended service set (ESS)

C Access points in each cell must be configured to use channel 1

D The area of overlap must be less than 10% of the area to ensure connectivity

E The two APs should be configured to operate on different channels

A Global addresses start with 2000::/3

B Link-local addresses start with FE00:/12

C Link-local addresses start with FF00::/10

D There is only one loopback address and it is ::1

E If a global address is assigned to an interface, then that is the only allowable address for the

A The Fa0/11 role confirms that SwitchA is the root bridge for VLAN 20

B VLAN 20 is running the Per VLAN Spanning Tree Protocol

C The MAC address of the root bridge is 0017.596d.1580

D SwitchA is not the root bridge, because not all of the interface roles are designated

Answer: D

Explanation:

QUESTION NO: 36

Which two of these statements are true of IPv6 address representation? (Choose two.)

A There are four types of IPv6 addresses: unicast, multicast, anycast, and broadcast

B A single interface may be assigned multiple IPv6 addresses of any type

C Every IPv6 interface contains at least one loopback address

D The first 64 bits represent the dynamically created interface ID

E Leading zeros in an IPv6 16 bit hexadecimal field are mandatory

Answer: B,C

Explanation:

QUESTION NO: 37

What are three basic parameters to configure on a wireless access point? (Choose three.)

RF is an acronym for Radio Frequency It is the electromagnetic frequency that can be radiated tospace, frequency range from 300 KHz to 30GHz

QUESTION NO: 38

Refer to the exhibit A system administrator installed a new switch using a script to configure it IPconnectivity was tested using pings to SwitchB Later attempts to access NewSwitch using Telnetfrom SwitchA failed Which statement is true?

A Executing password recovery is required

B The virtual terminal lines are misconfigured

C Use Telnet to connect to RouterA and then to NewSwitch to correct the error

D Power cycle of NewSwitch will return it to a default configuration

Answer: C

Explanation:

QUESTION NO: 39

Which two of these statements regarding RSTP are correct? (Choose two.)

A RSTP cannot operate with PVST+

B RSTP defines new port roles

C RSTP defines no new port states

D RSTP is a proprietary implementation of IEEE 802.1D STP

E RSTP is compatible with the original IEEE 802.1D STP

Answer: B,E

Explanation:

When network topology changes, rapid spanning tree protocol (IEEE802.1W, referred to as RSTP)will speed up significantly the speed to re-calculate spanning tree RSTP not only defines the role

of other ports: alternative port and backup port, but also defines status of 3 ports: discarding

status, learning status, forwarding status

RSTP is 802.1D standard evolution, not revolution It retains most of the parameters, and makes

no changes

QUESTION NO: 40

Which three of these statements regarding 802.1 Q trunking are correct? (Choose three.)

A 802.1 Q native VLAN frames are untagged by default

B 802.1 Q trunking ports can also be secure ports

C 802.1 Q trunks can use 10 Mb/s Ethernet interfaces

D 802.1 Q trunks require full-duplex, point-to-point connectivity

E 802.1 Q trunks should have native VLANs that are the same at both ends

Answer: A,C,E

Explanation:

By default, 802.1Q trunk defined Native VLAN in order to forward unmarked frame Switches canforward Layer 2 frame from Native VLAN on unmarked trunks port Receiver switches will transmitall unmarked packets to Native VLAN Native VLAN is the default VLAN configuration of port.Note: for the 802.1Q trunk ports between two devices, the same Native VLAN configuration isrequired on both sides of the link If the Native VLAN in 802.1Q trunk ports on same trunk link isproperly configured, it could lead to layer 2 loops The 802.1Q trunk link transmits VLAN

information through Ethernet

QUESTION NO: 41

Refer to the exhibit Each of these four switches has been configured with a hostname, as well asbeing configured to run RSTP No other configuration changes have been made Which three ofthese show the correct RSTP port roles for the indicated switches and interfaces? (Choose three.)

A SwitchA, Fa0/2, designated

B SwitchA, Fa0/1, root

C SwitchB, Gi0/2, root

D SwitchB, Gi0/1, designated

E SwitchC, Fa0/2, root

F SwitchD, Gi0/2, root

Answer: A,B,F

Explanation:

QUESTION NO: 42

Refer to the exhibit A junior network administrator was given the task of configuring port security

on SwitchA to allow only PC_A to access the switched network through port fa0/1 If any otherdevice is detected, the port is to drop frames from this device The administrator configured theinterface and tested it with successful pings from PC_A to RouterA, and then observes the outputfrom these two show commands

Which two of these changes are necessary for SwitchA to meet the requirements? (Choose two.)

A Configure port security to shut down the interface in the event of a violation

B Port security needs to be enabled on the interface

C Enable port security globally

D Port security needs to be configured to allow only one learned MAC address

E Port security interface counters need to be cleared before using the show command

F The port security configuration needs to be saved to NVRAM before it can become active Answer: B,D

Explanation:

This question is to examine the layer 2 port security

According to the exhibit, we know that the port security is configured to restrict the interface in theevent of a violation So A is wrong

The port security should be enabled on the interface, not globally

So the correct answers are B and D

QUESTION NO: 43

Which of the following correctly describe steps in the OSI data encapsulation process? (Choosetwo)

A The transport layer divides a data stream into segments and may add reliability and flow control

information

B The data link layer adds physical source and destination addresses and an FCS to the

segment

C Packets are created when the network layer encapsulates a frame with source and destination

host addresses and protocol-related control information

D Packets are created when the network layer adds Layer 3 addresses and control information to

a segment

E The presentation layer translates bits into voltages for transmission across the physical link Answer: A,D

Explanation:

The Application Layer (Layer 7) refers to communications services to applications and is the

interface between the network and the application Examples include: Telnet, HTTP, FTP, Internetbrowsers, NFS, SMTP gateways, SNMP, X.400 mail, and FTAM

The Presentation Layer (Layer 6) defining data formats, such as ASCII text, EBCDIC text, binary,BCD, and JPEG Encryption also is defined as a presentation layer service Examples include:JPEG, ASCII, EBCDIC, TIFF, GIF, PICT, encryption, MPEG, and MIDI

The Session Layer (Layer 5) defines how to start, control, and end communication sessions Thisincludes the control and management of multiple bidirectional messages so that the applicationcan be notified if only some of a series of messages are completed This allows the presentationlayer to have a seamless view of an incoming stream of data The presentation layer can be

presented with data if all flows occur in some cases Examples include: RPC, SQL, NFS, NetBiosnames, AppleTalk ASP, and DECnet SCP

The Transport Layer (Layer 4) defines several functions, including the choice of protocols Themost important Layer 4 functions are error recovery and flow control The transport layer mayprovide for retransmission, i.e., error recovery, and may use flow control to prevent unnecessarycongestion by attempting to send data at a rate that the network can accommodate, or it might not,depending on the choice of protocols Multiplexing of incoming data for different flows to

applications on the same host is also performed Reordering of the incoming data stream whenpackets arrive out of order is included Examples include: TCP, UDP, and SPX

The Network Layer (Layer 3) defines end-to-end delivery of packets and defines logical

addressing to accomplish this It also defines how routing works and how routes are learned; andhow to fragment a packet into smaller packets to accommodate media with smaller maximumtransmission unit sizes Examples include: IP, IPX, AppleTalk DDP, and ICMP Both IP and IPXdefine logical addressing, routing, the learning of routing information, and end-to-end deliveryrules The IP and IPX protocols most closely match the OSI network layer (Layer 3) and are calledLayer 3 protocols because their functions most closely match OSI's Layer 3

The Data Link Layer (Layer 2) is concerned with getting data across one particular link or medium.The data link protocols define delivery across an individual link These protocols are necessarilyconcerned with the type of media in use Examples include: IEEE 802.3/802.2, HDLC, FrameRelay, PPP, FDDI, ATM, and IEEE 802.5/802.2

Which set of commands is recommended to prevent the use of a hub in the access layer?

A switch(config-if)#switchport mode trunk

switch(config-if)#switchport port-security maximum 1

B switch(config-if)#switchport mode trunk

switch(config-if)#switchport port-security mac-address 1

C switch(config-if)#switchport mode access

switch(config-if)#switchport port-security maximum 1

D switch(config-if)#switchport mode access

switch(config-if)#switchport port-security mac-address 1

Answer: C

Explanation:

This question is to examine the layer 2 security configuration

In order to satisfy the requirements of this question, you should perform the following

configurations in the interface mode:

First, configure the interface mode as the access mode

Second, enable the port security and set the maximum number of connections to 1

QUESTION NO: 46

By default, each port in a Cisco Catalyst switch is assigned to VLAN1 Which two

recommendations are key to avoid unauthorized management access? (Choose two.)

A Create an additional ACL to block the access to VLAN 1

B Move the management VLAN to something other than default

C Move all ports to another VLAN and deactivate the default VLAN

D Limit the access in the switch using port security configuration

E Use static VLAN in trunks and access ports to restrict connections

F Shutdown all unused ports in the Catalyst switch

Which layer of the OSI reference model uses the hardware address of a device to ensure

message delivery to the proper host on a LAN?

What is the principle reason to use a private IP address on an internal network?

A Subnet strategy for private companies

B Manage and scale the growth of the internal network

C Conserve public IP addresses so that we do not run out of them

D Allow access reserved to the devices

The correct answer is C

What will happen if a private IP address is assigned to a public interface connected to an ISP?

A Addresses in a private range will be not routed on the Internet backbone

B Only the ISP router will have the capability to access the public network

C The NAT process will be used to translate this address in a valid IP address

D Several automated methods will be necessary on the private network

E A conflict of IP addresses happens, because other public routers can use the same range Answer: A

Explanation:

QUESTION NO: 57

When is it necessary to use a public IP address on a routing interface?

A Connect a router on a local network

B Connect a router to another router

C Allow distribution of routes between networks

D Translate a private IP address

E Connect a network to the Internet

This question is to examine the MAC address structure

The MAC address is expressed as a 48-bit hexadecimal number The first 24-bit number is toidentify the vendor/manufacturer, also called OUI The latter 24-bit is assigned by the vendor

QUESTION NO: 59

In an Ethernet network, under what two scenarios can devices transmit? (Choose two.)

A when they receive a special token

B when there is a carrier

C when they detect no other devices are sending

D when the medium is idle

E when the server grants access

This question is to examine the IPv6 application

There are three IPv6 transition mechanisms:

Which statement about RIPng is true?

A RIPng uses broadcasts to exchange routes

B RIPng is enabled on each interface separately

C There can be only one RIPng process per router

D RIPng allows for routes with up to 30 hops

Answer: B

Explanation:

QUESTION NO: 62

Which statement about IPv6 is true?

A Addresses are not hierarchical and are assigned at random

B Only one IPv6 address can exist on a given interface

C There are 2.7 billion addresses available

D Broadcasts have been eliminated and replaced with multicasts

Answer: D

Explanation:

This question is to check the concept of IPv6

IPv4 supports three address types: unicast, multicast and broadcast

In IPv6, broadcasts have been eliminated and replaced with multicasts At the same time, IPv6introduces another address type - anycast

QUESTION NO: 63

Which line from the output of the show ip interface command indicates a layer 1 problem?

A Serial0/1 is up, line protocol is down

B Serial0/1 is down, line protocol is down

C Serial0/1 is up, line protocol is up

D Serial0/1 is administratively down, line protocol is down

command is the most appropriate to use?

QoS policies are applied on the switches of a LAN Which type of command will show the effects

of the policy in real time?