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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. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
A broadcast address will never be the source address of a frame
The port is experiencing errors
Auto - Desirable - and On
Show cdp neighbor detail

2. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
It operates without collisions and It provides faster data transfer
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.
Telnet and FTP

3. 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 will forward the frame to a specific port
An electrical pulse indicates that the collision has cleared.
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.
A cross-over cable

4. 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
Device Identifiers - Capabilities list - Platform
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Information about a route should never be sent back in the direction from which the original update came.

5. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Layer 4
Transport
802.3ab and 802.3z
It operates without collisions and It provides faster data transfer

6. 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 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 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 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.
Layer 3

7. 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?
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 switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The network layer
The Bridgeg ID and The bridge priority

8. 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?
Auto - On - and Desirable
Switches increase the number of collision domains in the network.
HTTPS
It will prevent segment 1's broadcasts from getting to segment 2.

9. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
CertK Switch(config)# ip default-gateway 192.168.1.115
Information about a route should never be sent back in the direction from which the original update came.
HTTPS
Decrease the window size.

10. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
A cross-over cable
A broadcast address will never be the source address of a frame
TCP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

11. Which of the following services use TCP?
SMTP FTP and HTTP
Layer 4
MAC Address and Bridge Priority
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

12. What is the purpose of the spanning-tree algorithm in a switched LAN?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Application
To prevent switching loops in networks with redundant switched paths.
An electrical pulse indicates that the collision has cleared.

13. You need to perform some initial configuration tasks on a new Certkiller switch. What is the purpose of assigning an IP address to a switch?
Increased latency and Filtering of all frame errors
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Source Port - Acknowledgment Number - and Window
To allow remote management of the switch.

14. 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 port is experiencing errors
Sequence number - Window size - and Acknowledgment number
Decrease the window size.
Configure the switch so that it has a lower priority than other switches in the network.

15. CDP is running between two CK devices. What information is supplied by CDP?
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
A broadcast address will never be the source address of a frame
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

16. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Learning - Listening - and Forwarding
The sequence number in the TCP header.
It is the sum of the costs based on bandwidth
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

17. Which of the following correctly describe steps in the OSI date encapsulation process?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Switches - Bridges - and Routers
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 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.

18. 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
Information about a route should never be sent back in the direction from which the original update came.
SMTP FTP and HTTP
Application

19. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Transport
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Fiber optic cable.
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.

20. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Learning - Listening - and Forwarding
A broadcast address will never be the source address of a frame

21. 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?
Information about a route should never be sent back in the direction from which the original update came.
Certkiller B > trace
Physical Layer and Datalink Layer
The network layer

22. 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
Learning - Listening - and Forwarding
Packet switching - Packet filtering and Internetwork communication.
Network

23. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Layer 3
Show cdp neighbor detail
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Decrease the window size.

24. 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?
VTP
In an improperly implemented redundant topology
All switch and bridge ports are in either the forwarding or blocking state.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

25. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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 - On - and Desirable
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
HTTPS

26. 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.
The port is experiencing errors
Packet switching - Packet filtering and Internetwork communication.
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

27. 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
Device Identifiers - Capabilities list - Platform
Data link
STP
MAC Address and Bridge Priority

28. With regard to Ethernet media access methods - which of the following are true?
All switch and bridge ports are in either the forwarding or blocking state.
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.
STP
CertK Switch(config)# ip default-gateway 192.168.1.115

29. 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.
Learning - Listening - and Forwarding
Encapsulations PPP and authentication CHAP
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.

30. 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?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The switch will forward the frame to a specific port
Buffering - Cut-through - and Congestion avoidance
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.

31. As a Certkiller trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?
It will prevent segment 1's broadcasts from getting to segment 2.
It is the sum of the costs based on bandwidth
CertK Switch(config)# ip default-gateway 192.168.1.115
Application

32. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Network
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
STP
802.1Q and ISL

33. 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?
Auto - Desirable - and On
Duplex mismatch
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.

34. 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?
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 hub and A repeater.
Learning - Listening - and Forwarding
The system is malfunctioning.

35. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
A cross-over cable
Network
Information about a route should never be sent back in the direction from which the original update came.
A hub and A repeater.

36. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
VTP will allow switches to share VLAN configuration information
In an improperly implemented redundant topology
MAC Address and Bridge Priority
To prevent switching loops in networks with redundant switched paths.

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.)
Network
VTP will allow switches to share VLAN configuration information
MAC Address and Bridge Priority
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.

38. Which of the following correctly describe the various functions and virtues of a router?
An additional broadcast domain will be created.
Packet switching - Packet filtering and Internetwork communication.
Fiber optic cable.
HTTPS

39. 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?
Buffering - Cut-through - and Congestion avoidance
Show cdp neighbor detail
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Layer 3

40. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Configure the switch so that it has lower priority than other switches in the network
802.3ab and 802.3z
It is used to prevent switching loops in networks with redundant switched routes.
Serial0/1 is down - line protocol is down

41. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches - Bridges - and Routers
Show cdp neighbor detail
Physical Layer and Datalink Layer
Certkiller B > trace

42. 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?
VTP
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Increased latency and Filtering of all frame errors
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

43. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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.
An additional broadcast domain will be created.
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. 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?
A hub and A repeater.
Sequence number - Window size - and Acknowledgment number
100 meters
Layer 4

45. Which OSI layer header contains the address of a destination host that is on another network?
Hosts use a logical bus topology
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
ARP and ICMP

46. 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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Information about a route should never be sent back in the direction from which the original update came.

47. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
It operates without collisions and It provides faster data transfer
All switch and bridge ports are in either the forwarding or blocking state.
Switches increase the number of collision domains in the network.
Certkiller B > trace

48. 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?
To prevent switching loops in networks with redundant switched paths.
ARP and ICMP
Data link
Configure the switch so that it has a lower priority than other switches in the network.

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?
Auto - On - and Desirable
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.
Congestion avoidance - Windowing and Buffering
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

50. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Data link
A cross-over cable
Switches increase the number of collision domains in the network.
SMTP FTP and HTTP