Examen CCNA Certificacion Test

Diego Arturo Aba
Quiz by Diego Arturo Aba, updated more than 1 year ago
Diego Arturo Aba
Created by Diego Arturo Aba almost 4 years ago
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Quiz on Examen CCNA Certificacion Test, created by Diego Arturo Aba on 04/18/2016.
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Question 1

Question
Which layer in the OSI reference model is responsible for determining the availability of the receiving program and checking to see if enough resources exist for that communication?
Answer
  • transport
  • network
  • presentation
  • session
  • application

Question 2

Question
A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port?
Answer
  • This is a 10 Mb/s switch port.
  • This is a 100 Mb/s switch port.
  • This is an Ethernet port operating at half duplex.
  • This is an Ethernet port operating at full duplex.
  • This is a port on a network interface card in a PC.

Question 3

Question
A receiving host computes the checksum on a frame and determines that the frame is damaged. The frame is then discarded. At which OSI layer did this happen?
Answer
  • physical
  • session
  • data link
  • transport
  • network

Question 4

Question
Which of the following correctly describe steps in the OSI data encapsulation process? (Choose two)
Answer
  • The transport layer divides a data stream into segments and may add reliability and flow control information.
  • The data link layer adds physical source and destination addresses and an FCS to the segment.
  • Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.
  • Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
  • The presentation layer translates bits into voltages for transmission across the physical link.

Question 5

Question
Host A is communicating with the server. What will be the source MAC address of the frames received by Host A from the server?
Answer
  • The MAC address of the server network interface
  • The MAC address of host A
  • The MAC address of router interface e1
  • The MAC address of router interface e0

Question 6

Question
Refer to the exhibit. What two results would occur if the hub were to be replaced with a switch that is configured with one Ethernet VLAN? (Choose two.)
Answer
  • The number of broadcast domains would remain the same.
  • The number of collision domains would increase.
  • The number of collision domains would decrease.
  • The number of broadcast domains would decrease.
  • The number of collision domains would remain the same.
  • he number of broadcast domains would increase.

Question 7

Question
For what two purposes does the Ethernet protocol use physical addresses? (Choose two.)
Answer
  • To uniquely identify devices at Layer 2
  • To allow communication with devices on a different network
  • To differentiate a Layer 2 frame from a Layer 3 packet
  • To establish a priority system to determine which device gets to transmit first
  • To allow communication between different devices on the same network
  • To allow detection of a remote device when its physical address is unknown

Question 8

Question
In an Ethernet network, under what two scenarios can devices transmit? (Choose two.)
Answer
  • When they receive a special token
  • when there is a carrier
  • When they detect no other devices are sending
  • When the medium is idle
  • When the server grants access

Question 9

Question
Which of the following statements describe the network shown in the graphic? What are the proper statements?. (Choose two)
Answer
  • There are two broadcast domains in the network.
  • There are four broadcast domains in the network.
  • There are six broadcast domains in the network.
  • There are four collision domains in the network. in the network.
  • There are five collision domains in the network.
  • There are seven collision domains

Question 10

Question
How many broadcast domains are shown in the graphic assuming only the default VLAN is configured on the switches?
Answer
  • one
  • six
  • twelve
  • two

Question 11

Question
What is the first 24 bits in a MAC address called?
Answer
  • NIC
  • BIA
  • OUI
  • VAI

Question 12

Question
A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server. What is the highest layer of the protocol stack that the network administrator is using for this operation?
Answer
  • Application
  • Presentation
  • Session
  • Transport
  • Internet
  • data link

Question 13

Question
Where does routing occur within the DoD TCP/IP reference model?
Answer
  • Application
  • Internet
  • Network
  • Transport

Question 14

Question
Which statement describes the process of dynamically assigning IP addresses by the DHCP server?
Answer
  • Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
  • Addresses are permanently assigned so that the hosts uses the same address at all times.
  • Addresses are assigned for a fixed period of time, at the end of the period, a new request for an address must be made.
  • Addresses are leased to hosts, which periodically contact the DHCP server to renew the lease.

Question 15

Question
How does a DHCP server dynamically assign IP addresses to hosts?
Answer
  • Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
  • Addresses are permanently assigned so that the hosts uses the same address at all times.
  • Addresses are assigned for a fixed period of time, at the end of the period, a new request for an address must be made.
  • Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.

Question 16

Question
Which two tasks does the Dynamic Host Configuration Protocol perform? (Choose two.)
Answer
  • Set the IP gateway to be used by the network.
  • Perform host discovery used DHCPDISCOVER message.
  • Configure IP address parameters from DHCP server to a host.
  • Provide an easy management of layer 3 devices.
  • Monitor IP performance using the DHCP server.
  • Assign and renew IP address from the default pool.

Question 17

Question
Which statement is correct regarding the operation of DHCP?
Answer
  • A DHCP client uses a ping to detect address conficts.
  • A DHCP server uses a gratuitous ARP to detect DHCP clients.
  • A DHCP client uses a gratuitous ARP to detect a DHCP server.
  • f an address conflict is detected, the address is removed from the pool and an administrator must resolve the conflict.
  • If an address conflict is detected, the address is removed from the pool for an amount of time configurable by the administrator.
  • If an address conflict is detected, the address is removed from the pool and will not be reused until the server is rebooted.

Question 18

Question
Refer to the exhibit. Host A pings interface S0/0 on router 3. What is the TTL value for that ping?
Answer
  • 252
  • 253
  • 254
  • 255

Question 19

Question
Which command can be used from a PC to verify the connectivity between hosts that connect through a switch in the same LAN?
Answer
  • Ping address
  • Tracert address
  • Traceroute address
  • Arp address

Question 20

Question
An administrator must assign static IP addresses to the servers in a network. For network 192.168.20.24/29, the router is assigned the first usable host address while the sales server is given the last usable host address. Which of the following should be entered into the IP properties box for the sales server?
Answer
  • - IP address: 192.168.20.14 - Subnet Mask: 255.255.255.248 - Default Gateway: 192.168.20.9
  • - IP address: 192.168.20.254 - Subnet Mask: 255.255.255.0 - Default Gateway: 192.168.20.1
  • - P address: 192.168.20.30 - Subnet Mask: 255.255.255.248 - Default Gateway: 192.168.20.25
  • - IP address: 192.168.20.30 - Subnet Mask: 255.255.255.240 - Default Gateway: 192.168.20.17
  • - IP address: 192.168.20.30 - Subnet Mask: 255.255.255.240 - Default Gateway: 192.168.20.25

Question 21

Question
Which subnet mask would be appropriate for a network address range to be subnetted for up to eight LANs, with each LAN containing 5 to 26 hosts?
Answer
  • 0.0.0.240
  • 255.255.255.252
  • 255.255.255.0
  • 255.255.255.224
  • 255.255.255.240

Question 22

Question
When a DHCP server is configured, which two IP addresses should never be assignable to hosts? (Choose two.)
Answer
  • Network or subnetwork IP address
  • Broadcast address on the network
  • P address leased to the LAN
  • IP address used by the interfaces
  • Manually assigned address to the clients
  • Designated IP address to the DHCP server

Question 23

Question
A national retail chain needs to design an IP addressing scheme to support a nationwide network. The company needs a minimum of 300 sub-networks and a maximum of 50 host addresses per subnet. Working with only one Class B address, which of the following subnet masks will support an appropriate addressing scheme? (Choose two.)
Answer
  • 255.255.255.0
  • 255.255.255.128
  • 255.255.252.0
  • 255.255.255.224
  • 255.255.255.192
  • 255.255.248.0

Question 24

Question
What will happen if a private IP address is assigned to a public interface connected to an ISP?
Answer
  • Addresses in a private range will be not routed on the Internet backbone.
  • Only the ISP router will have the capability to access the public network.
  • The NAT process will be used to translate this address in a valid IP address.
  • Several automated methods will be necessary on the private network.
  • A conflict of IP addresses happens, because other public routers can use the same range.

Question 25

Question
Refer to the exhibit. An administrator pings the default gateway at 10.10.10.1 and sees the output as shown. At which OSI layer is the problem?
Answer
  • Data link layer
  • Application layer
  • Access layer
  • Session layer
  • Network layer

Question 26

Question
Refer to the exhibit. A new subnet with 60 hosts has been added to the network. Which subnet address should this network use to provide enough usable addresses while wasting the fewest addresses?
Answer
  • 92.168.1.56/27
  • 192.168.1.64/26
  • 192.168.1.64/27
  • 192.168.1.56/26

Question 27

Question
Refer to the exhibit. All of the routers in the network are configured with the ip subnet-zero command. Which network addresses should be used for Link A and Network A? (Choose two.)
Answer
  • Network A – 172.16.3.48/26
  • Network A – 172.16.3.128/25
  • Network A – 172.16.3.192/26
  • Link A – 172.16.3.0/30
  • Link A – 172.16.3.40/30
  • Link A – 172.16.3.112/30

Question 28

Question
Refer to the exhibit. Which subnet mask will place all hosts on Network B in the same subnet with the least amount of wasted addresses?
Answer
  • 255.255.255.0
  • 255.255.254.0
  • 255.255.252.0
  • 255.255.248.0

Question 29

Question
Refer to the exhibit. What is the most appropriate summarization for these routes?
Answer
  • 10.0.0.0 /21
  • 10.0.0.0 /22
  • 10.0.0.0 /23
  • 10.0.0.0 /24

Question 30

Question
Given an IP address 172.16.28.252 with a subnet mask of 255.255.240.0, what is the correct network address?
Answer
  • 172.16.16.0
  • 172.16.24.0
  • 172.16.0.0
  • 172.16.28.0

Question 31

Question
You are working in a data center environment and are assigned the address range 10.188.31.0/23. You are asked to develop an IP addressing plan to allow the maximum number of subnets with as many as 30 hosts each. Which IP address range meets these requirements?
Answer
  • 10.188.31.0/27
  • 10.188.31.0/26
  • 10.188.31.0/29
  • 10.188.31.0/28
  • 10.188.31.0/25

Question 32

Question
The network administrator needs to address seven LANs. RIP version 1 is the only routing protocol in use on the network and subnet 0 is not being used. What is the maximum number of usable IP addresses that can be supported on each LAN if the organization is using one class C address block?
Answer
  • 8
  • 6
  • 30
  • 32
  • 14
  • 16

Question 33

Question
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 to R2? (Choose two.)
Answer
  • 192.168.194.160
  • 192.168.183.41
  • 192.168.159.2
  • 192.168.183.255
  • 192.168.179.4
  • 192.168.184.45

Question 34

Question
Refer to the exhibit. What will Router1 do when it receives the data frame shown? (Choose three.)
Answer
  • Router1 will strip off the source MAC address and replace it with the MAC address 0000.0c36.6965.
  • Router1 will strip off the source IP address and replace it with the IP address 192.168.40.1.
  • Router1 will strip off the destination MAC address and replace it with the MAC address 0000.0c07.4320.
  • Router1 will strip off the destination IP address and replace it with the IP address of 192.168.40.1.
  • Router1 will forward the data packet out interface FastEthernet0/1.
  • Router1 will forward the data packet out interface FastEthernet0/2.

Question 35

Question
Refer to the exhibit. What is the meaning of the output MTU 1500 bytes?
Answer
  • The maximum number of bytes that can traverse this interface per second is 1500.
  • The minimum segment size that can traverse this interface is 1500 bytes.
  • The maximum segment size that can traverse this interface is 1500 bytes.
  • The minimum packet size that can traverse this interface is 1500 bytes.
  • The maximum packet size that can traverse this interface is 1500 bytes.
  • The maximum frame size that can traverse this interface is 1500 bytes.

Question 36

Question
Which command would you use on a Cisco router to verify the Layer 3 path to a host?
Answer
  • tracert address
  • traceroute address
  • telnet address
  • ssh address

Question 37

Question
Refer to the exhibit. A network administrator configures a new router and enters the copy startup-config runningconfig command on the router. The network administrator powers down the router and sets it up at a remote location. When the router starts, it enters the system configuration dialog as shown. What is the cause of the problem?
Answer
  • The network administrator failed to save the configuration.
  • The configuration register is set to 0x2100.
  • The boot system flash command is missing from the configuration.
  • The configuration register is set to 0x2102.
  • The router is configured with the boot system startup command.

Question 38

Question
Refer to the exhibit. What can be determined about the router from the console output?
Answer
  • No configuration file was found in NVRAM.
  • No configuration file was found in flash.
  • No configuration file was found in the PCMCIA card.
  • Configuration file is normal and will load in 15 seconds.

Question 39

Question
When you are troubleshooting an ACL issue on a router, which command can help you to verify which interfaces are affected by the ACL?
Answer
  • Show access-lists
  • Show interface
  • Show ip interface
  • Show ip access-lists
  • List ip interface

Question 40

Question
Which router IOS commands can be used to troubleshoot LAN connectivity problems? (Choose three.)
Answer
  • winipcfg
  • tracert
  • ping
  • ip config
  • Show ip route
  • show interfaces

Question 41

Question
Refer to the exhibit. What is the reason that the interface status is “administratively down, line protocol down”?
Answer
  • There is no encapsulation type configured.
  • There is a mismatch in encapsulation types.
  • The interface is not receiving any keepalives.
  • The interface has been configured with the shutdown command.
  • The interface needs to be configured as a DTE device.
  • The wrong type of cable is connected to the interface.

Question 42

Question
What is a global command?
Answer
  • a command that is set once and affects the entire router.
  • a command that is implemented in all foreign and domestic IOS versions.
  • a command that is universal in application and supports all protocols.
  • a command that is available in every release of IOS, regardless of the version or deployment status
  • a command that can be entered in any configuration mode.

Question 43

Question
Which command can you use to manually assign a static IPv6 address to a router interface?
Answer
  • ipv6 address PREFIX_1::1/64
  • ipv6 autoconfig 2001:db8:2222:7272::72/64
  • ipv6 autoconfig
  • ipv6 address 2001:db8:2222:7272::72/64
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