Test your basic knowledge |

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. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Increased latency and Filtering of all frame errors
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.
Layer 3
The Bridgeg ID and The bridge priority

2. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
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
Path selections and Packet switching.
The port is experiencing errors
SMTP - FTP - HTTP - and HTTPS

3. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Information about a route should never be sent back in the direction from which the original update came.
A hub and A repeater.
Configure the switch so that it has a lower priority than other switches in the network.
Encapsulations PPP and authentication CHAP

4. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
HTTPS - SMTP - and TFTP
ARP and ICMP
Learning - Listening - and Forwarding

5. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Sequence number - Window size - and Acknowledgment number
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Switches increase the number of collision domains in the network.
Data link

6. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
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
Switches - Bridges - and Routers
It operates without collisions and It provides faster data transfer

7. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
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.
Network
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.

8. By default - which of the following factors determines the spanning-tree path cost?
The Bridgeg ID and The bridge priority
An additional broadcast domain will be created.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
It is the sum of the costs based on bandwidth

9. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VTP will allow switches to share VLAN configuration information
Source Port - Acknowledgment Number - and Window
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Information about a route should never be sent back in the direction from which the original update came.

10. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Device Identifiers - Capabilities list - Platform
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
It will prevent segment 1's broadcasts from getting to segment 2.

11. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
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.
Switches increase the number of collision domains in the network.
The system is malfunctioning.
MAC Address and Bridge Priority

12. Which fields are included in the TCP header?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Physical Layer and Datalink Layer
Source Port - Acknowledgment Number - and Window
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

13. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The interfaces must be configured for NAT.
Certkiller B > trace
Data link

14. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
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.
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.
Information about a route should never be sent back in the direction from which the original update came.
All switch and bridge ports are in either the forwarding or blocking state.

15. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Port security
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Data link
Physical Layer and Datalink Layer

16. An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location?
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.
Network
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.
The network layer

17. Which of the following are true of Ethernet technology?
It operates without collisions and It provides faster data transfer
Switches - Bridges - and Routers
Hosts use a logical bus topology
Auto - Desirable - and On

18. Which of the following services use TCP?
SMTP FTP and HTTP
The system is malfunctioning.
Switches increase the number of collision domains in the network.
Learning - Listening - and Forwarding

19. 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?
Increased latency and Filtering of all frame errors
Hosts use a logical bus topology
A cross-over cable
The network layer

20. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
Auto - Desirable - and On
Physical Layer and Datalink Layer
The switch will forward the frame to a specific port

21. A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch assumes the role of the Root Bridge?
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.
Configure the switch so that it has a lower priority than other switches in the network.
VTP will allow switches to share VLAN configuration information

22. 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?
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
Layer 4
Application
The system is malfunctioning.

23. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
The network layer
Packet switching - Packet filtering and Internetwork communication.
VTP

24. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
A broadcast address will never be the source address of a frame
VLAN and Swtich
The network layer

25. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
STP
It will prevent segment 1's broadcasts from getting to segment 2.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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.

26. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Increased latency and Filtering of all frame errors
Serial0/1 is down - line protocol is down

27. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The network layer
Physical Layer and Datalink Layer

28. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
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
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
MAC Address and Bridge Priority
100 meters

29. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
802.3ab and 802.3z
Auto - Desirable - and On
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Source Port - Acknowledgment Number - and Window

30. Two buildings on the London campus of a CK corporation must be connected to use Ethernet with a bandwidth of at least 100 Mbps. CK is concerned about possible problems from voltage potential differences between the two buldings. Which media type shou
Fiber optic cable.
It will prevent segment 1's broadcasts from getting to segment 2.
It is the sum of the costs based on bandwidth
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.

31. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Show cdp neighbor detail
Packet switching - Packet filtering and Internetwork communication.
It is used to prevent switching loops in networks with redundant switched routes.
All switch and bridge ports are in either the forwarding or blocking state.

32. 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
Network
Increased latency and Filtering of all frame errors
Buffering - Cut-through - and Congestion avoidance
Show arp and Show interface

33. Both bridges are switches are being used throughout the CK LAN. Which of the following statements are true regarding bridges and switches in this network?
Packet switching - Packet filtering and Internetwork communication.
It is used to prevent switching loops in networks with redundant switched routes.
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.
It operates without collisions and It provides faster data transfer

34. In a switched LAN network - What is the Spanning-Tree algorithm used for?
An electrical pulse indicates that the collision has cleared.
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.
It is used to prevent switching loops in networks with redundant switched routes.
Switches increase the number of collision domains in the network.

35. Which of the protocols below use TCP at the transport layer?
It will prevent segment 1's broadcasts from getting to segment 2.
A hub and A repeater.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
SMTP - FTP - HTTP - and HTTPS

36. 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?
The sequence number in the TCP header.
Telnet and FTP
All switch and bridge ports are in either the forwarding or blocking state.
Layer 4

37. Which two of the following values does STP take into consideration when it elects the root bridge?
It is used to prevent switching loops in networks with redundant switched routes.
Auto - On - and Desirable
The Bridgeg ID and The bridge priority
Device Identifiers - Capabilities list - Platform

38. While troubleshooting a network connectivity problem - a Certkiller technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However - when the ping command is issued from the works
Encapsulations PPP and authentication CHAP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The network layer
Device Identifiers - Capabilities list - Platform

39. Which of the following devices can the Certkiller network administrator use to segment the LAN?
A cross-over cable
VTP
Switches - Bridges - and Routers
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

40. 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?
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
It operates without collisions and It provides faster data transfer
SMTP - FTP - HTTP - and HTTPS
Network

41. Which of the following can lead to the contribution of LAN traffic congestion?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Decrease the window size.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Layer 4

42. On a half-duplex Ethernet LAN - two hosts attempt to send data simultaneously - resulting in a collision. Following this collision - what will the hosts do?
An electrical pulse indicates that the collision has cleared.
It operates without collisions and It provides faster data transfer
Network
CertK Switch(config)# ip default-gateway 192.168.1.115

43. 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?
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.
Decrease the window size.
It will prevent segment 1's broadcasts from getting to segment 2.
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.

44. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
It will prevent segment 1's broadcasts from getting to segment 2.
Transport
All switch and bridge ports are in either the forwarding or blocking state.
Show cdp neighbor detail

45. 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
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.
The network layer
Information about a route should never be sent back in the direction from which the original update came.
To allow remote management of the switch.

46. Which of the following are types of flow control?
An additional broadcast domain will be created.
Buffering - Cut-through - and Congestion avoidance
802.3ab and 802.3z
VTP will allow switches to share VLAN configuration information

47. Certkiller users have noticed extremely slow network performance - intermittent connectivity - and connection losses. After entering the 'show interfaces' command - you notice that the Ethernet interface is configured as 100 Mbps full-duplex and that
Application
Duplex mismatch
Switches increase the number of collision domains in the network.
Telnet and FTP

48. Although TCP segments are similar to UDP segments - TCP packets contains some additional fields. Which of the following are found in a TCP header - but not in a UDP header?
CertK Switch(config)# ip default-gateway 192.168.1.115
Sequence number - Window size - and Acknowledgment number
Switches - Bridges - and Routers
It is used to prevent switching loops in networks with redundant switched routes.

49. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
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
Application
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.

50. 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.)
VTP will allow switches to share VLAN configuration information
Layer 4
MAC Address and Bridge Priority
To prevent switching loops in networks with redundant switched paths.