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. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Transport
Packet switching - Packet filtering and Internetwork communication.
MAC Address and Bridge Priority
A broadcast address will never be the source address of a frame

2. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
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.
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 port is experiencing errors
Auto - On - and Desirable

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

4. Which of the following correctly describe the various functions and virtues of a router?
Physical Layer and Datalink Layer
It operates without collisions and It provides faster data transfer
A hub and A repeater.
Packet switching - Packet filtering and Internetwork communication.

5. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Path selections and Packet switching.
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.
Encapsulations PPP and authentication CHAP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

6. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
The system is malfunctioning.
Network
Transport
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

7. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.1Q and ISL
HTTPS
The switch will forward the frame to a specific port
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.

8. 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
Duplex mismatch
Switches - Bridges - and Routers
Data link
802.3ab and 802.3z

9. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
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.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
HTTPS - SMTP - and TFTP

10. 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?
Switches - Bridges - and Routers
A hub and A repeater.
The network layer
All switch and bridge ports are in either the forwarding or blocking state.

11. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Switches increase the number of collision domains in the network.
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.
VTP will allow switches to share VLAN configuration information
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.

12. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
TCP
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.
Auto - Desirable - and On
Port security

13. 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.)
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.
MAC Address and Bridge Priority
STP
The switch will forward the frame to a specific port

14. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
STP
Information about a route should never be sent back in the direction from which the original update came.
The network layer
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.

15. You have set up an Internet based FTP server - where people can upload and download files. In terms of the OSI model - What is the highest layer used during the FTP sessions.
Switches increase the number of collision domains in the network.
Application
Show cdp neighbor detail
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

16. In a switched LAN network - What is the Spanning-Tree algorithm used for?
802.3ab and 802.3z
It is used to prevent switching loops in networks with redundant switched routes.
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.
HTTPS - SMTP - and TFTP

17. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
The Bridgeg ID and The 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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

18. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
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.
Layer 4
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Switches increase the number of collision domains in the network.

19. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
ARP and ICMP
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.
100 meters
Switches increase the number of collision domains in the network.

20. Which three of the protocols below belong to the application layer? (Select three answer choices)
Switches - Bridges - and Routers
Application
TCP
HTTPS - SMTP - and TFTP

21. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free 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
STP
Buffering - Cut-through - and Congestion avoidance
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

22. 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
Configure the switch so that it has a lower priority than other switches in the network.
802.1Q and ISL
Application

23. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
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
In an improperly implemented redundant topology
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Congestion avoidance - Windowing and Buffering

24. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
The system is malfunctioning.
Auto - Desirable - and On
Learning - Listening - and Forwarding
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.

25. Which of the following can lead to the contribution of LAN traffic congestion?
The network layer
Information about a route should never be sent back in the direction from which the original update came.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
VTP

26. By default - which of the following factors determines the spanning-tree path cost?
Application
Application
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
It is the sum of the costs based on bandwidth

27. 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?
Network
HTTPS - SMTP - and TFTP
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The Bridgeg ID and The bridge priority

28. 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 network layer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Sequence number - Window size - and Acknowledgment number

29. 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?
Configure the switch so that it has a lower priority than other switches in the network.
A hub and A repeater.
SMTP FTP and HTTP
Decrease the window size.

30. 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?
To prevent switching loops in networks with redundant switched paths.
HTTPS
STP
Port security

31. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Serial0/1 is down - line protocol is down
TCP
Buffering - Cut-through - and Congestion avoidance
A hub and A repeater.

32. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
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.
Transport
Path selections and Packet switching.

33. 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
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
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.
HTTPS - SMTP - and TFTP

34. 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?
The system is malfunctioning.
Show cdp neighbor detail
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.
802.1Q and ISL

35. 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
Source Port - Acknowledgment Number - and Window
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Serial0/1 is down - line protocol is down
ARP and ICMP

36. 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?
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.
HTTPS
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.
Layer 4

37. Which of the following are true of Ethernet technology?
HTTPS - SMTP - and TFTP
Device Identifiers - Capabilities list - Platform
Hosts use a logical bus topology
802.1Q and ISL

38. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A hub and A repeater.
The network layer
Layer 4

39. 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.
Decrease the window size.
Switches increase the number of collision domains in the network.
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.

40. 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 increase the number of collision domains in the network.
Application
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
Increased latency and Filtering of all frame errors

41. 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?
Increased latency and Filtering of all frame errors
To prevent switching loops in networks with redundant switched paths.
Physical Layer and Datalink Layer
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

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?
The network layer
Layer 3
MAC Address and Bridge Priority
Network

43. 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
An additional broadcast domain will be created.
VTP
HTTPS

44. 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?
Configure the switch so that it has a lower priority than other switches in the network.
Network
MAC Address and Bridge Priority
Application

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
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.
Data link
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.
Layer 3

46. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Layer 4
In an improperly implemented redundant topology
The system is malfunctioning.
All switch and bridge ports are in either the forwarding or blocking state.

47. A Certkiller Ethernet switch receives a unicast frame with a destination MAC that IS listed in the switch table. What will this switch do with the frame?
The switch will forward the frame to a specific port
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
VTP will allow switches to share VLAN configuration information
Data link

48. 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?
SMTP - FTP - HTTP - and HTTPS
VTP will allow switches to share VLAN configuration information
Path selections and Packet switching.
VTP

49. 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?
Certkiller B > trace
Telnet and FTP
Configure the switch so that it has a lower priority than other switches in the network.
Serial0/1 is down - line protocol is down

50. 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
The network layer
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
802.1Q and ISL
100 meters