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. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Auto - Desirable - and On
Duplex mismatch
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.
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.

2. Which of the following can lead to the contribution of LAN traffic congestion?
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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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
Port security

3. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Path selections and Packet switching.
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.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
A broadcast address will never be the source address of a frame

4. Which of the following correctly describe steps in the OSI date encapsulation process?
Increased latency and Filtering of all frame errors
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.
The network layer
Duplex mismatch

5. 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
An electrical pulse indicates that the collision has cleared.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Duplex mismatch
The interfaces must be configured for NAT.

6. 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?
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.
Switches increase the number of collision domains in the network.
In an improperly implemented redundant topology
Increased latency and Filtering of all frame errors

7. 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
Configure the switch so that it has a lower priority than other switches in the network.
The Bridgeg ID and The bridge priority
The network layer
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

8. 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?
Data link
It is the sum of the costs based on bandwidth
Telnet and FTP
Layer 4

9. 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?
Physical Layer and Datalink Layer
Port security
Transport
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.

10. 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
All switch and bridge ports are in either the forwarding or blocking state.
Fiber optic cable.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Application

11. You are logged into a router and wish to view the layer 3 information about your neighboring Cisco routers. What IOS command gives layer 3 information for of the directly connected router interfaces?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Port security
To prevent switching loops in networks with redundant switched paths.
Show cdp neighbor detail

12. In a switched LAN network - What is the Spanning-Tree algorithm used for?
It is used to prevent switching loops in networks with redundant switched routes.
Switches increase the number of collision domains in the network.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The interfaces must be configured for NAT.

13. With regard to Ethernet media access methods - which of the following are true?
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
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.
The sequence number in the TCP header.
An additional broadcast domain will be created.

14. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
TCP
Switches increase the number of collision domains in the network.
Telnet and FTP
Duplex mismatch

15. 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?
Data link
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Configure the switch so that it has lower priority than other switches in the network
The network layer

16. Which of the following services use TCP?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
It is the sum of the costs based on bandwidth
SMTP FTP and HTTP

17. 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 electrical pulse indicates that the collision has cleared.
MAC Address and Bridge Priority
Data link
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

18. The Certkiller network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?
All switch and bridge ports are in either the forwarding or blocking state.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Congestion avoidance - Windowing and Buffering
ARP and ICMP

19. Which fields are included in the TCP header?
Device Identifiers - Capabilities list - Platform
Source Port - Acknowledgment Number - and Window
The network layer
Layer 3

20. 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?
It is used to prevent switching loops in networks with redundant switched routes.
Encapsulations PPP and authentication CHAP
VLAN and Swtich
Congestion avoidance - Windowing and Buffering

21. CDP is running between two CK devices. What information is supplied by CDP?
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.
802.3ab and 802.3z
All switch and bridge ports are in either the forwarding or blocking state.
Device Identifiers - Capabilities list - Platform

22. 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?
To prevent switching loops in networks with redundant switched paths.
An additional broadcast domain will be created.
Source Port - Acknowledgment Number - and Window
Sequence number - Window size - and Acknowledgment number

23. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
Network
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Source Port - Acknowledgment Number - and Window

24. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Congestion avoidance - Windowing and Buffering
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Application

25. 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?
Configure the switch so that it has a lower priority than other switches in the 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.
It will prevent segment 1's broadcasts from getting to segment 2.
Sequence number - Window size - and Acknowledgment number

26. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
A hub and A repeater.
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.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Layer 4

27. 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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The port is experiencing errors
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.
Data link

28. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
An additional broadcast domain will be created.
It is used to prevent switching loops in networks with redundant switched routes.
Packet switching - Packet filtering and Internetwork communication.

29. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Auto - Desirable - and On
Auto - On - and Desirable
Physical Layer and Datalink Layer
Network

30. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VLAN and Swtich
Decrease the window size.
VTP will allow switches to share VLAN configuration information
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

31. As a network Admin - you will need to decide on the appropriate network devices to use. Which of the following correctly describes the roles of the devices in a WAN?
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.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
It operates without collisions and It provides faster data transfer
All switch and bridge ports are in either the forwarding or blocking state.

32. The LAN needs are expanding at the CK corporate office - which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the CK network. Which of the following are layer 1 devices that you can use?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
A broadcast address will never be the source address of a frame
A hub and A repeater.
SMTP FTP and HTTP

33. What are two characteristics of 'store and forward' switching?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

34. The Certkiller network administrator wants to use a router named CK1 to segment the local network. What are some of the advantages of using CK1 to segment the network? (Choose two)
802.1Q and ISL
Network
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

35. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Certkiller B > trace
This is an Ethernet port operating at half duplex
MAC Address and Bridge Priority
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

36. The Certkiller network administrator needs to a switch named CK1 to become the root bridge for a redundant path switched network. What can be done to ensure that CK1 will always assume the role as the root bridge?
Configure the switch so that it has lower priority than other switches in the network
Hosts use a logical bus topology
Sequence number - Window size - and Acknowledgment number
The switch will forward the frame to a specific port

37. Which of the following correctly describe the various functions and virtues of a router?
Show arp and Show interface
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Packet switching - Packet filtering and Internetwork communication.
Serial0/1 is down - line protocol is down

38. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Switches increase the number of collision domains in the network.
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

39. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Application
Path selections and Packet switching.
Network

40. Which three of the protocols below belong to the application layer? (Select three answer choices)
100 meters
HTTPS - SMTP - and TFTP
Auto - On - and Desirable
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

41. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Show cdp neighbor detail
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.
802.3ab and 802.3z

42. 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?
Port security
HTTPS
Configure the switch so that it has a lower priority than other switches in the network.
Layer 3

43. 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
Show arp and Show interface
Learning - Listening - and Forwarding
To allow remote management of the switch.
The system is malfunctioning.

44. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Fiber optic cable.
802.3ab and 802.3z
A cross-over cable
Data link

45. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
This is an Ethernet port operating at half duplex
Transport
Packet switching - Packet filtering and Internetwork communication.
Layer 4

46. A Certkiller technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the sh
The interfaces must be configured for NAT.
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.
Data link
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

47. 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?
Physical Layer and Datalink Layer
To allow remote management of the switch.
This is an Ethernet port operating at half duplex
Serial0/1 is down - line protocol is down

48. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
To allow remote management of the switch.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
An additional broadcast domain will be created.
STP

49. 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?
802.3ab and 802.3z
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Increased latency and Filtering of all frame errors
Auto - Desirable - and On

50. 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?
A cross-over cable
Serial0/1 is down - line protocol is down
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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.