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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. The Certkiller LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
MAC Address and Bridge Priority

2. Which of the following are true of Ethernet technology?
Switches - Bridges - and Routers
Application
Hosts use a logical bus topology
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

3. Which IOS user EXEC command will allow a network technician to determine which router in the path to an unreachable network host should be examined more closely for the cause of the network failure?
Source Port - Acknowledgment Number - and Window
HTTPS - SMTP - and TFTP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Certkiller B > trace

4. By default - which of the following factors determines the spanning-tree path cost?
Configure the switch so that it has lower priority than other switches in the network
It will prevent segment 1's broadcasts from getting to segment 2.
It is the sum of the costs based on bandwidth
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

5. Which of the following are spanning tree port states?
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
Application
Learning - Listening - and Forwarding
VTP

6. While troubleshooting a connectivity problem - the Certkiller network administrator notices that a port status LED on a Cisco Catalyst Series switch is alternating between green and amber. Which condition could this indicate?
Certkiller B > trace
The port is experiencing errors
An electrical pulse indicates that the collision has cleared.
In an improperly implemented redundant topology

7. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Physical Layer and Datalink Layer
Telnet and FTP
Path selections and Packet switching.
The Bridgeg ID and The bridge priority

8. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Serial0/1 is down - line protocol is down
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Information about a route should never be sent back in the direction from which the original update came.
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.

9. While troubleshooting an issue in the Certkiller LAN you notice that 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?
Switches increase the number of collision domains in the network.
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.
This is an Ethernet port operating at half duplex
A broadcast address will never be the source address of a frame

10. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Telnet and FTP
An additional broadcast domain will be created.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Layer 4

11. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
The network layer
Physical Layer and Datalink Layer
Layer 4
VTP will allow switches to share VLAN configuration information

12. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.
Duplex mismatch
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.

13. What are two characteristics of 'store and forward' switching?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Switches increase the number of collision domains in the network.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The switch will forward the frame to a specific port

14. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
A cross-over cable
Telnet and FTP
Auto - On - and Desirable
Port security

15. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
A hub and A repeater.
100 meters
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to
To prevent switching loops in networks with redundant switched paths.

16. Both the switches and hubs are being utilized within the CK network. Which of the following is true regarding the use of switches and hubs for the network connectivity in this network?
Switches increase the number of collision domains in the network.
Application
It is used to prevent switching loops in networks with redundant switched routes.
The system is malfunctioning.

17. You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operations?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
In an improperly implemented redundant topology
Application
Information about a route should never be sent back in the direction from which the original update came.

18. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Sequence number - Window size - and Acknowledgment number
Device Identifiers - Capabilities list - Platform
A broadcast address will never be the source address of a frame
802.3ab and 802.3z

19. A network administrator wants to control which user hosts can access the network based on their MAC address. What will prevent workstations with unauthorized MAC addresses from connecting to the network through a switch?
Configure the switch so that it has lower priority than other switches in the network
The port is experiencing errors
MAC Address and Bridge Priority
Port security

20. The Certkiller corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?

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21. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Serial0/1 is down - line protocol is down
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Packet switching - Packet filtering and Internetwork communication.

22. You are the administrator of the Certkiller LAN and you have been reviewing error logs of networking devices and notice a large number of errors associated with several MAC addresses. You suspect that some of the errors are being generated by the rou
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Show arp and Show interface
Device Identifiers - Capabilities list - Platform
VLAN and Swtich

23. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Auto - On - and Desirable
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
HTTPS
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.

24. Which three of the protocols below belong to the application layer? (Select three answer choices)
VTP will allow switches to share VLAN configuration information
Application
HTTPS - SMTP - and TFTP
Data link

25. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
It will prevent segment 1's broadcasts from getting to segment 2.
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

26. You unsuccessfully try to ping the Internet from the PC host on the LAN. During the troubleshooting process - you enter the 'show ip nat translations' command but the output is blank. What is the most likely cause of the problem?
The interfaces must be configured for NAT.
Layer 4
Network
Application

27. Certkiller is installing IP phones in a new office. The phones and office computers connect to the same device. To ensure maximum throughout for the phone data sessions - the company needs to make sure that the phone traffic is on a different network
VLAN and Swtich
The system is malfunctioning.
In an improperly implemented redundant topology
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

28. As the Certkiller network administrator - you are required to have a firmunderstanding of the OSI model. Why does the data communication industry use the layered OSI reference model?
Switches - Bridges - and Routers
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
To prevent switching loops in networks with redundant switched paths.

29. Which of the following correctly describe the various functions and virtues of a router?
Fiber optic cable.
It provides a mechanism for the receiver to control the transmission speed - You have just installed a new web server on the Certkiller network. You are required to ensure that the web server is accessible from the Internet. The network uses private
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
Packet switching - Packet filtering and Internetwork communication.

30. Which OSI layer header contains the address of a destination host that is on another network?
Switches - Bridges - and Routers
Telnet and FTP
Network
Congestion avoidance - Windowing and Buffering

31. As a CCNA candidate - you will be expected to know the OSI model very well. Which of the following are associated with the application layer (layer 7) of the OSI model?
Configure the switch so that it has a lower priority than other switches in the network.
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
Telnet and FTP

32. when files are transferred between a host and an FTP server - the data is divided into smaller pieces of transmission. As these pieces arrive at the destination host they must be reassembled to reconstruct the original file. What provides for the rea
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.
Duplex mismatch
The sequence number in the TCP header.
A hub and A repeater.

33. Some of the older Certkiller switches store the entire frame before forwarding it to the destination. What are two effects on network performance of configuring a switch to do this?
Switches - Bridges - and Routers
Increased latency and Filtering of all frame errors
An electrical pulse indicates that the collision has cleared.
All switch and bridge ports are in either the forwarding or blocking state.

34. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Sequence number - Window size - and Acknowledgment number
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
This is an Ethernet port operating at half duplex

35. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Buffering - Cut-through - and Congestion avoidance
Information about a route should never be sent back in the direction from which the original update came.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Switches increase the number of collision domains in the network.

36. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
To allow remote management of the switch.
It will prevent segment 1's broadcasts from getting to segment 2.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

37. A new switch is installed in the Certkiller network. This switch is to be configured so that VLAN information will be automatically distributed to all the other Cisco Catalyst switches in the network. Which of the conditions below have to be met in o
Hosts use a logical bus topology
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

38. What is the purpose of the spanning-tree algorithm in a switched LAN?
Transport
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
To prevent switching loops in networks with redundant switched paths.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

39. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
The interfaces must be configured for NAT.
Hosts use a logical bus topology
TCP
Path selections and Packet switching.

40. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?
Decrease the window size.
It is used to prevent switching loops in networks with redundant switched routes.
The Bridgeg ID and The bridge priority
A hub and A repeater.

41. A host computer has been correctly configured with a static IP address - but the default gateway is incorrectly set. Which layer of the OSI model will be first effected by this configuration error?
Configure the switch so that it has a lower priority than other switches in the network.
VTP
MAC Address and Bridge Priority
Layer 3

42. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Configure the switch so that it has a lower priority than other switches in the network.
Path selections and Packet switching.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Transport

43. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
All switch and bridge ports are in either the forwarding or blocking state.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
SMTP FTP and HTTP
Switches increase the number of collision domains in the network.

44. As a CCNA candidate - you must know the various layers of the OSI model. At which layers of the OSI model do Wide Area Networks operate in?
Physical Layer and Datalink Layer
HTTPS
CertK Switch(config)# ip default-gateway 192.168.1.115
It provides a mechanism for the receiver to control the transmission speed - You have just installed a new web server on the Certkiller network. You are required to ensure that the web server is accessible from the Internet. The network uses private

45. Which protocol uses TCP port 443 at layer 4?
A broadcast address will never be the source address of a frame
Switches increase the number of collision domains in the network.
Serial0/1 is down - line protocol is down
HTTPS

46. You want to influence the root bridge selection within the Certkiller LAN. Which two values are used by spanning tree protocol to elect a root bridge? (Choose two.)
An additional broadcast domain will be created.
MAC Address and Bridge Priority
Fiber optic cable.
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.

47. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Configure the switch so that it has a lower priority than other switches in the network.

48. While troubleshooting a connectivity problem on the network - you issure the ping command from your PC command prompt - but the output shows 'request times out' At which OSI layer is this problem associated with?
In an improperly implemented redundant topology
The network layer
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
Auto - Desirable - and On

49. You need to describe the various types of flow control to your co-workers. Which of the following are types of flow control that can be used in a network?
Increased latency and Filtering of all frame errors
Configure the switch so that it has lower priority than other switches in the network
Auto - On - and Desirable
Congestion avoidance - Windowing and Buffering

50. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
HTTPS
Telnet and FTP
To allow remote management of the switch.
Data link