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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. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
A cross-over cable
A hub and A repeater.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

2. 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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Network
Fiber optic cable.
An electrical pulse indicates that the collision has cleared.

3. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
To allow remote management of the switch.
SMTP - FTP - HTTP - and HTTPS
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.

4. 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 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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Data link

5. 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?
SMTP - FTP - HTTP - and HTTPS
It will prevent segment 1's broadcasts from getting to segment 2.
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.
Sequence number - Window size - and Acknowledgment number

6. 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.
This is an Ethernet port operating at half duplex
Information about a route should never be sent back in the direction from which the original update came.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

7. Which of the following are spanning tree port states?
Device Identifiers - Capabilities list - Platform
Show cdp neighbor detail
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Learning - Listening - and Forwarding

8. With regard to Ethernet media access methods - which of the following are true?
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.
Device Identifiers - Capabilities list - Platform
Packet switching - Packet filtering and Internetwork communication.
VTP

9. Which of the following correctly describe the various functions and virtues of a router?
Switches - Bridges - and Routers
STP
Packet switching - Packet filtering and Internetwork communication.
Transport

10. 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?
To allow remote management of the switch.
Transport
The network layer
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

11. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Device Identifiers - Capabilities list - Platform
In an improperly implemented redundant topology
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Switches increase the number of collision domains in the network.

12. Which two of the following values does STP take into consideration when it elects the root bridge?
To allow remote management of the switch.
A cross-over cable
The Bridgeg ID and The bridge priority
Port security

13. 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?
STP
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
Information about a route should never be sent back in the direction from which the original update came.
Layer 4

14. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
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
VTP will allow switches to share VLAN configuration information

15. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Switches increase the number of collision domains in the network.
Layer 3
Switches - Bridges - and Routers
Serial0/1 is down - line protocol is down

16. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Device Identifiers - Capabilities list - Platform
The Bridgeg ID and The bridge priority
Switches - Bridges - and Routers
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.

17. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Application
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
All switch and bridge ports are in either the forwarding or blocking state.
It is used to prevent switching loops in networks with redundant switched routes.

18. 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 allow remote management of the switch.
Packet switching - Packet filtering and Internetwork communication.
Show arp and Show interface
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.

19. 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?
802.1Q and ISL
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The interfaces must be configured for NAT.
Application

20. 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
Information about a route should never be sent back in the direction from which the original update came.
Switches increase the number of collision domains in the network.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

21. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Information about a route should never be sent back in the direction from which the original update came.
It is the sum of the costs based on bandwidth
Layer 3

22. What is the purpose of the spanning-tree algorithm in a switched LAN?
A cross-over cable
To prevent switching loops in networks with redundant switched paths.
MAC Address and Bridge Priority
Sequence number - Window size - and Acknowledgment number

23. 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
Information about a route should never be sent back in the direction from which the original update came.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.

24. The Certkiller corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?

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25. 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
The network layer
A broadcast address will never be the source address of a frame
Network

26. 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 is the sum of the costs based on bandwidth
All switch and bridge ports are in either the forwarding or blocking state.
Network
Show arp and Show interface

27. 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?
Application
802.1Q and ISL
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.

28. Which of the following are types of flow control?
Layer 3
Decrease the window size.
Buffering - Cut-through - and Congestion avoidance
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

29. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
HTTPS

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?
Port security
It is used to prevent switching loops in networks with redundant switched routes.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Network

31. A Certkiller switch is configured with all ports assigned to VLAN 2. In addition - all ports are configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on this switch?
The sequence number in the TCP header.
An additional broadcast domain will be created.
Data link
Layer 4

32. 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.
All switch and bridge ports are in either the forwarding or blocking state.
Application
Buffering - Cut-through - and Congestion avoidance
Network

33. 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?
Layer 4
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Switches increase the number of collision domains in the network.
Network

34. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.1Q and ISL
The Bridgeg ID and The bridge priority
The interfaces must be configured for NAT.
An additional broadcast domain will be created.

35. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
HTTPS
CertK Switch(config)# ip default-gateway 192.168.1.115
The network layer
Encapsulations PPP and authentication CHAP

36. 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?
Show cdp neighbor detail
Physical Layer and Datalink Layer
The interfaces must be configured for NAT.
An electrical pulse indicates that the collision has cleared.

37. 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.
SMTP - FTP - HTTP - and HTTPS
The port is experiencing errors
SMTP FTP and HTTP

38. 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?
100 meters
An electrical pulse indicates that the collision has cleared.
ARP and ICMP
TCP

39. Which of the following correctly describe steps in the OSI date encapsulation process?
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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
100 meters
Sequence number - Window size - and Acknowledgment number

40. 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?
A cross-over cable
Layer 4
A hub and A repeater.
Layer 4

41. Which OSI layer header contains the address of a destination host that is on another network?
Configure the switch so that it has lower priority than other switches in the network
Switches - Bridges - and Routers
Learning - Listening - and Forwarding
Network

42. 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.
It is used to prevent switching loops in networks with redundant switched routes.
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.
Fiber optic cable.

43. Which fields are included in the TCP header?
Application
Source Port - Acknowledgment Number - and Window
It is the sum of the costs based on bandwidth
Switches increase the number of collision domains in the network.

44. 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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
802.3ab and 802.3z
802.1Q and ISL
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

45. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Fiber optic cable.
The system is malfunctioning.
The network layer
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.

46. 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?
All switch and bridge ports are in either the forwarding or blocking state.
Telnet and FTP
Application
Packet switching - Packet filtering and Internetwork communication.

47. 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
HTTPS
The interfaces must be configured for NAT.
Information about a route should never be sent back in the direction from which the original update came.

48. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
Increased latency and Filtering of all frame errors
The network layer
802.1Q and ISL

49. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Application
Sequence number - Window size - and Acknowledgment number
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.

50. 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?
STP
Decrease the window size.
Network
HTTPS