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. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Learning - Listening - and Forwarding
A hub and A repeater.
It is used to prevent switching loops in networks with redundant switched routes.
It will prevent segment 1's broadcasts from getting to segment 2.

2. 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
Path selections and Packet switching.
Information about a route should never be sent back in the direction from which the original update came.
Data link

3. The CK network administrator needs to determine what LAN devices to install on the CK network. What are two advantages of using Layer 2 Ethernet switches over hubs?
SMTP - FTP - HTTP - and HTTPS
The system is malfunctioning.
Show cdp neighbor detail
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

4. 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?
Switches increase the number of collision domains in the network.
VLAN and Swtich
CertK Switch(config)# ip default-gateway 192.168.1.115
An electrical pulse indicates that the collision has cleared.

5. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
SMTP - FTP - HTTP - and HTTPS
Network
Auto - On - and Desirable
Application

6. 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
The system is malfunctioning.
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.
Fiber optic cable.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

7. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Physical Layer and Datalink Layer
Switches increase the number of collision domains in the network.
It will prevent segment 1's broadcasts from getting to segment 2.
Data link

8. Which fields are included in the TCP header?
A hub and A repeater.
Source Port - Acknowledgment Number - and Window
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
VTP will allow switches to share VLAN configuration information

9. 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
Network
The interfaces must be configured for NAT.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

10. What kind of cable should be used to establish a trunked line between two Catalyst switches?
This is an Ethernet port operating at half duplex
The interfaces must be configured for NAT.
A cross-over cable
Show cdp neighbor detail

11. 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?
The port is experiencing errors
The system is malfunctioning.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

12. 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
100 meters
To prevent switching loops in networks with redundant switched paths.
TCP
The network layer

13. 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
Device Identifiers - Capabilities list - Platform
MAC Address and Bridge Priority
Configure the switch so that it has lower priority than other switches in the network

14. With regard to Ethernet media access methods - which of the following are true?
Application
HTTPS - SMTP - and TFTP
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

15. Network equipment supporting the use of flow control mechanisms has been recently installed in the CK network. What is the purpose of flow control in a data 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
The switch will forward the frame to a specific port
Decrease the window size.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

16. 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?
VLAN and Swtich
Configure the switch so that it has a lower priority than other switches in the network.
Hosts use a logical bus topology
Packet switching - Packet filtering and Internetwork communication.

17. 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
The sequence number in the TCP header.
Fiber optic cable.
Certkiller B > trace
All switch and bridge ports are in either the forwarding or blocking state.

18. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Layer 4
Application
Encapsulations PPP and authentication CHAP
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

19. Which of the following correctly describe the various functions and virtues of a router?
Buffering - Cut-through - and Congestion avoidance
Port security
Packet switching - Packet filtering and Internetwork communication.
Hosts use a logical bus topology

20. 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?
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 interfaces must be configured for NAT.
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.
Transport

21. The corporate head office of Certkiller has a teleconferencing system that uses VOIP (voice over IP) technology. This system uses UDP as the transport for the data transmissions. If these UDP datagrams arrive at their destination out of sequence - wh
It operates without collisions and It provides faster data transfer
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
All switch and bridge ports are in either the forwarding or blocking state.
The switch will forward the frame to a specific port

22. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
An electrical pulse indicates that the collision has cleared.
Encapsulations PPP and authentication CHAP
It is the sum of the costs based on bandwidth
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

23. 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?
The network layer
Congestion avoidance - Windowing and Buffering
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.
Application

24. 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?
Configure the switch so that it has lower priority than other switches in the network
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Transport

25. 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?
Auto - On - and Desirable
The network layer
SMTP - FTP - HTTP - and HTTPS
Auto - Desirable - and On

26. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
VTP will allow switches to share VLAN configuration information
Data link
Buffering - Cut-through - and Congestion avoidance
The interfaces must be configured for NAT.

27. Which of the following correctly describe steps in the OSI date encapsulation process?
HTTPS
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
The sequence number in the TCP header.
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.

28. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Switches - Bridges - and Routers
The port is experiencing errors
Path selections and Packet switching.
It is the sum of the costs based on bandwidth

29. 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?
This is an Ethernet port operating at half duplex
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Telnet and FTP
All switch and bridge ports are in either the forwarding or blocking state.

30. 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
It operates without collisions and It provides faster data transfer
Show arp and Show interface
A cross-over cable
Serial0/1 is down - line protocol is down

31. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Hosts use a logical bus topology
100 meters
ARP and ICMP
In an improperly implemented redundant topology

32. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
Physical Layer and Datalink Layer
Layer 4
TCP

33. 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?
ARP and ICMP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Layer 4
VLAN and Swtich

34. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Buffering - Cut-through - and Congestion avoidance
Application
The Bridgeg ID and The bridge priority
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.

35. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
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.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Device Identifiers - Capabilities list - Platform
Data link

36. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
VLAN and Swtich
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
MAC Address and Bridge Priority
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

37. 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.)
MAC Address and Bridge Priority
Data link
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The network layer

38. 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 - Bridges - and Routers
The interfaces must be configured for NAT.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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.

39. By default - which of the following factors determines the spanning-tree path cost?
Source Port - Acknowledgment Number - and Window
The system is malfunctioning.
It is the sum of the costs based on bandwidth
Decrease the window size.

40. 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
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Information about a route should never be sent back in the direction from which the original update came.
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.
Configure the switch so that it has a lower priority than other switches in the network.

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?
The switch will forward the frame to a specific port
Switches increase the number of collision domains in the network.
Layer 3
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.

42. 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?
Port security
Configure the switch so that it has lower priority than other switches in the network
Serial0/1 is down - line protocol is down
Data link

43. 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?
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
Encapsulations PPP and authentication CHAP
An additional broadcast domain will be created.

44. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The port is experiencing errors
Transport

45. Which of the following are types of flow control?
Auto - On - and Desirable
VLAN and Swtich
Buffering - Cut-through - and Congestion avoidance
In an improperly implemented redundant topology

46. Which of the following are spanning tree port states?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Learning - Listening - and Forwarding
To prevent switching loops in networks with redundant switched paths.
Duplex mismatch

47. Which two of the following values does STP take into consideration when it elects the root bridge?
Application
To prevent switching loops in networks with redundant switched paths.
Fiber optic cable.
The Bridgeg ID and The bridge priority

48. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
In an improperly implemented redundant topology
The network layer
VTP will allow switches to share VLAN configuration information
HTTPS

49. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
To prevent switching loops in networks with redundant switched paths.
SMTP FTP and HTTP
All switch and bridge ports are in either the forwarding or blocking state.
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.

50. You need to configure two Certkiller switches to exchange VLAN information. Which protocol provides a method of sharing VLAN configuration information between these two switches?
It is used to prevent switching loops in networks with redundant switched routes.
VTP
CertK Switch(config)# ip default-gateway 192.168.1.115
A cross-over cable